Ajuda:Extensão:ParserFunctions

<languages/> <translate> The <tvar|1>Extension:ParserFunctions </> extension provides eleven additional parser functions to supplement the "{{<tvar|2>ll|Help:Magic words#Parser functions</>|magic words}}", which are already present in MediaWiki.</translate> <translate> (It may be configured to provide additional parser functions for string handling; these string functions are documented {{<tvar|ext-sf>ll|Extension:StringFunctions#Functions</>|elsewhere}}.)</translate> <translate> All the parser functions provided by this extension take the form:</translate>

{{<translate> #functionname: argument 1 | argument 2 | argument 3 ... </translate>}}

#expr

<translate> Type</translate>	<translate> Operators</translate>
<translate> Grouping (parentheses)</translate>	( )
<translate> Numbers</translate>	1234.5   e (2.718)   pi (3.142)
	<translate> binary operator</translate> e   <translate> unary</translate> +,-
<translate> Unary</translate>	not ceil trunc floor abs exp ln sin cos tan acos asin atan
<translate> Binary</translate>	^
	* / div mod
	+ -
<translate> Round</translate>	round
<translate> Logic</translate>	= != <> > < >= <=
	and
	or

<translate> This function evaluates a mathematical expression and returns the calculated value.</translate> <translate> This function is also available in <tvar|1>Extension:Scribunto </> via the <tvar|expr>mw.ext.ParserFunctions.expr</> function.</translate>

{{#expr: <translate> expression</translate> }}

<translate> The available operators are listed to the right, in order of precedence. See [[<tvar|1>m:Special:MyLanguage/Help:Calculation</>|Help:Calculation]] for more details of the function of each operator. The accuracy and format of the result returned will vary depending on the operating system of the server running the wiki and the number format of the site language.

When evaluating using boolean algebra, zero evaluates to false, and any nonzero value, positive or negative, evaluates to true: </translate>

{{#expr: 1 and -1 }} → 1

{{#expr: 1 and 0 }} → 0

{{#expr: 1 or -1 }} → 1

{{#expr: -1 or 0 }} → 1

{{#expr: 0 or 0 }} → 0

<translate> An empty input expression returns an empty string. Invalid expressions return one of several error messages, which can be caught using the <tvar|iferror>#iferror</> function: </translate>

{{#expr: }} →

{{#expr: 1+ }} →

{{#expr: 1 = }} →

{{#expr: 1 foo 2 }} →

<translate> The order of addition and subtraction operands before or after a number is meaningful and may be treated as a positive or negative value instead of as an operand with an erroneous input: </translate>

{{#expr: +1 }} → 1

{{#expr: -1 }} → -1

{{#expr: + 1 }} → 1

{{#expr: - 1 }} → -1

<translate> Note, if using the output of magic words, you must raw-format them in order to remove commas and translate the numerals. For example, <tvar|numberofusers>{{NUMBEROFUSERS}}</> results in <tvar|nou-result>23</>, where we want <tvar|nou-result-raw>23</>, which can be obtained using <tvar|numberofusers2>{{formatnum :{{NUMBEROFUSERS}}|R}}</>. This is especially important in some languages, where numerals are translated. For example, in Bengali, <tvar|numberofusers3>{{NUMBEROFUSERS}}</> produces <tvar|bengali>৩০,০৬১</>. </translate>

{{#expr:{{NUMBEROFUSERS}}+100}} → 123

{{#expr:{{formatnum:{{NUMBEROFUSERS}}|R}}+100}} → 123

<translate>

Rounding

[<tvar|php>https://php.net/function.round</> Rounds] off the number on the left to a multiple of 1/10 raised to a power, with the exponent equal to the truncated value of the number given on the right.

To round up or down use unary <tvar|ceil>ceil</> or <tvar|floor>floor</> respectively. </translate>

<translate> Test case</translate>	<translate> Result</translate>	<translate> Method of rounding</translate>
{{#expr: 1/3 round 5 }}	0.33333	<translate> Final digit is < 5, so no apparent rounding occurs</translate>
{{#expr: 1/6 round 5 }}	0.16667	<translate> Final digit is ≥ 5, so it is rounded up</translate>
{{#expr: 8.99999/9 round 5 }}	1	<translate> Again, the result is rounded up on the last digit, which results in additional rounding</translate>
{{#expr: 1234.5678 round -2 }}	1200	<translate> Rounded to nearest 100 because negative values round to the left of the decimal point</translate>
{{#expr: 1234.5678 round 2 }}	1234.57	<translate> Rounded to nearest 100th because positive values round to the right of the decimal point</translate>
{{#expr: 1234.5678 round 2.3 }}	1234.57	<translate> Decimals in the rounding index make no difference in the rounded result</translate>
{{#expr: trunc 1234.5678 }}	1234	<translate> Decimal portion truncated (chopped off)</translate>
<translate> Rounding to the nearest integer</translate>
{{#expr: 1/3 round 0 }}	0	<translate> Down to the nearest integer, which is zero</translate>
{{#expr: 1/2 round 0 }}	1	<translate> Up to the nearest integer, which is one</translate>
{{#expr: 3/4 round 0 }}	1	<translate> Up to the nearest integer, which is one</translate>
{{#expr: -1/3 round 0 }}	-0	<translate> Up to the nearest integer, which is zero</translate>
{{#expr: -1/2 round 0 }}	-1	<translate> Down to the nearest integer, which is negative one</translate>
{{#expr: -3/4 round 0 }}	-1	<translate> Down to the nearest integer, which is negative one</translate>
<translate> Rounding up or down with ceil and floor</translate>
{{#expr: ceil(1/3) }}	1	<translate> Up to the next larger integer, which is one</translate>
{{#expr: floor(1/3) }}	0	<translate> Down to the next smaller integer, which is zero</translate>
{{#expr: ceil(-1/3) }}	-0	<translate> Up to the next larger integer, which is zero</translate>
{{#expr: floor(-1/3) }}	-1	<translate> Down to the next smaller integer, which is negative one</translate>
{{#expr: ceil 1/3 }}	0.33333333333333	<translate> Not rounded, since 1 already is an integer</translate>

<translate>

Strings

Expressions only work with number-like values, they cannot compare strings or characters. <tvar|ifeq>#ifeq</> can be used instead. </translate>

{{#expr: "a" = "a" }} →

{{#expr: a = a }} →

{{#ifeq: a | a | 1 | 0 }} → 1

#if

<translate> This function evaluates a test string and determines whether or not it is empty. A test string containing only white space is considered to be empty. </translate>

{{#if: <translate> test string</translate> | <translate> value if test string is not empty</translate> | <translate> value if test string is empty (or only white space)</translate> }}

{{#if: <translate> first parameter</translate> | <translate> second parameter</translate> | <translate> third parameter</translate> }}

<translate> This function first tests whether the first parameter is not empty. If the first parameter is not empty the function displays the second argument. If the first parameter is empty or contains only whitespace characters (spaces, newlines, etc.) it displays the third argument. </translate>

{{#if: | yes | no}} → no

{{#if: string | yes | no}} → yes

{{#if:      | yes | no}} → no

{{#if:


| yes | no}} → no

<translate> The test string is always interpreted as pure text, so mathematical expressions are not evaluated: </translate>

{{#if: 1==2 | yes | no }} → yes

{{#if: 0 | yes | no }} → yes

<translate> The last parameter (false) may be omitted: </translate>

{{#if: foo | yes }} → yes

{{#if: | yes }} →

{{#if: foo | | no}} →

<translate> The function may be nested. To do so, nest the inner #if function in its full form in place of a parameter of the enclosing #if function. Up to seven levels of nesting is possible, although that may depend on the wiki or a memory limit.

<tvar|code1>{{#if</>: test string | value if test string is not empty | <tvar|code2>{{#if</>: test string | value if test string is not empty | value if test string is empty (or only white space) <tvar|code3>}} }}</>

</translate>

<translate> You can also use a parameter as the test string in your #if statement. You need to ensure you add the <tvar|pipe>|</> (pipe symbol) after the name of the variable.</translate> <translate> (So that if the parameter does not have a value, it evaluates to an empty string instead of the string "{{{1}}}".)</translate>

<translate>

<tvar|code1>{{#if:{{{1|}}}</>|You entered text in variable 1|There is no text in variable 1 <tvar|code2>}}</>

See <tvar|1>Help:Parser functions in templates </> for more examples of this parser function. </translate>

#ifeq

<translate> This parser function compares two input strings, determines whether they are identical, and returns one of two strings based on the result.</translate> <translate> If more comparisons and output strings are required, consider using <tvar|switch>#switch</>.</translate>

{{#ifeq: string 1 | string 2 | value if identical | value if different }}

<translate> If both strings are valid numerical values, the strings are compared numerically: </translate>

{{#ifeq: 01 | 1 | equal | not equal}} → equal

{{#ifeq: 0 | -0 | equal | not equal}} → equal

{{#ifeq: 1e3 | 1000 | equal | not equal}} → equal

{{#ifeq: {{#expr:10^3}} | 1000 | equal | not equal}} → equal

<translate> Otherwise the comparison is made as text; this comparison is case sensitive: </translate>

{{#ifeq: foo | bar | equal | not equal}} → not equal

{{#ifeq: foo | Foo | equal | not equal}} → not equal

{{#ifeq: "01" | "1" | equal | not equal}} → not equal  <translate> (compare to similar example above, without the quotes)</translate>

{{#ifeq: 10^3 | 1000 | equal | not equal}} → not equal  <translate> (compare to similar example above, with <tvar|expr>#expr</> returning a valid number first)</translate>

<translate> As a practical example, consider an existing {{<tvar|help-templates>ll|Help:Templates</>|template}} Template:Timer using the parser to choose between two standard times, short and long.</translate> <translate> It takes the parameter as the first input to compare against the string "short" – there is no convention for the order, but it is simpler to read if the parameter goes first.</translate> <translate> The template code is defined as:</translate>

{{#ifeq: {{{1|}}} | short | 20 | 40 }}

<translate> the following ensue: </translate>

{{timer|short}} → 20

{{timer|20}} → 40

{{timer}} → 40

#iferror

<translate> This function takes an input string and returns one of two results; the function evaluates to <tvar|true>true</> if the input string contains an HTML object with <tvar|error>class="error"</>, as generated by other parser functions such as <tvar|expr>#expr</>, <tvar|time>#time</> and <tvar|rel2abs>#rel2abs</>, [[<tvar|templates>Special:MyLanguage/Help:Templates</>|template]] errors such as loops and recursions, and other "failsoft" parser errors. </translate>

{{#iferror: test string | value if error | value if correct }}

<translate> One or both of the return strings can be omitted. If the correct string is omitted, the test string is returned if it is not erroneous. If the error string is also omitted, an empty string is returned on an error: </translate>

{{#iferror: {{#expr: 1 + 2 }} | error | correct }} → correct

{{#iferror: {{#expr: 1 + X }} | error | correct }} → error

{{#iferror: {{#expr: 1 + 2 }} | error }} → 3

{{#iferror: {{#expr: 1 + X }} | error }} → error

{{#iferror: {{#expr: 1 + 2 }} }} → 3

{{#iferror: {{#expr: 1 + X }} }} → ‌

{{#iferror: {{#expr: . }} | error | correct }} → correct

{{#iferror: <strong class="error">a</strong> | error | correct }} → error

#ifexpr

<translate> This function evaluates a mathematical expression and returns one of two strings depending on the boolean value of the result: </translate>

{{#ifexpr: expression | value if true | value if false }}

<translate> The expression input is evaluated exactly as for <tvar|expr>#expr</> above, with the same operators being available. The output is then evaluated as a boolean expression.

An empty input expression evaluates to <tvar|false>false</>: </translate>

{{#ifexpr: | yes | no}} → no

<translate> As mentioned above, zero evaluates to <tvar|false>false</> and any nonzero value evaluates to <tvar|true>true</>, so this function is equivalent to one using <tvar|ifeq>#ifeq</> and <tvar|expr>#expr</> only: </translate>

{{#ifeq: {{#expr: expression }} | 0 | value if false | value if true }}

<translate> except for an empty or wrong input expression (an error message is treated as an empty string; it is not equal to zero, so we get value if true). </translate>

{{#ifexpr: = | yes | no }} →

<translate> comparing </translate>

{{#ifeq: {{#expr: = }} | 0 | no | yes }} → yes

<translate> Either or both the return values may be omitted; no output is given when the appropriate branch is left empty: </translate>

{{#ifexpr: 1 > 0 | yes }} → yes

{{#ifexpr: 1 < 0 | yes }} →

{{#ifexpr: 0 = 0 | yes }} → yes

{{#ifexpr: 1 > 0 | | no}} →

{{#ifexpr: 1 < 0 | | no}} → no

{{#ifexpr: 1 > 0 }} →

#ifexist

<translate> This function takes an input string, interprets it as a page title, and returns one of two values depending on whether or not the page exists on the local wiki. </translate>

{{#ifexist: page title | value if exists | value if doesn't exist }}

<translate> The function evaluates to true if the page exists, whether it contains content, is visibly blank (contains meta-data such as category links or {{<tvar|help-magic>ll|Help:Magic words</>|magic words}}, but no visible content), is blank, or is a {{<tvar|help-redirects>ll|Help:Redirects</>|redirect}}. Only pages that are redlinked evaluate to false, including if the page used to exist but has been deleted. </translate>

{{#ifexist: Ajuda:Extensão:ParserFunctions | exists | doesn't exist }} → exists

{{#ifexist: XXAjuda:Extensão:ParserFunctionsXX | exists | doesn't exist }} → doesn't exist

<translate> The function evaluates to true for {{<tvar|system>ll|Help:System message</>|system messages}} that have been customized, and for {{<tvar|special>ll|Help:Special pages</>|special pages}} that are defined by the software. </translate>

{{#ifexist: Especial:Páginas vigiadas | exists | doesn't exist }} → exists

{{#ifexist: Especial:CheckUser | exists | doesn't exist }} → 1>Extension:Checkuser </> extension is installed on this wiki)</translate>

{{#ifexist: MediaWiki:Copyright | exists | doesn't exist }} → doesn't exist <translate> (because MediaWiki:Copyright has not been customized)</translate>

<translate> If a page checks a target using <tvar|ifexist>#ifexist:</>, then that page will appear in the <tvar|spec-wth>Especial:Páginas afluentes</> list for the target page. So if the code <tvar|code1>{{#ifexist</>:Foo <tvar|code2>}}</> were included live on this page (<tvar|fullpagename1>Ajuda:Extensão:ParserFunctions</>), [[<tvar|wth>Especial:Páginas afluentes</>/Foo]] will list <tvar|fullpagename2>Ajuda:Extensão:ParserFunctions</>.

On wikis using a shared media repository, <tvar|ifexist>#ifexist:</> can be used to check if a file has been uploaded to the repository but not to the wiki itself: </translate>

{{#ifexist: Arquivo:Example.png | exists | doesn't exist }} → exists

{{#ifexist: Image:Example.png | exists | doesn't exist }} → exists

{{#ifexist: Mídia:Example.png | exists | doesn't exist }} → exists

<translate> If a local description page has been created for the file, the result is exists for all of the above.

<tvar|ifexist>#ifexist:</> does not work with interwiki links.

ifexist limits

<tvar|ifexist>#ifexist:</> is considered an "expensive parser function"; only a limited number of which can be included on any one page (including functions inside transcluded templates). When this limit is exceeded, any further <tvar|ifexist>#ifexist:</> functions automatically return false, whether the target page exists or not, and the page is categorized into <tvar|category>Category:Páginas com muitas chamadas a funções do analisador "parser"</>. The name of the {{<tvar|tracking>ll|Help:Tracking categories</>|tracking category}} may vary depending on the content language of your wiki.

For some use cases it is possible to emulate the ifexist effect with css, by using the selectors a.new (to select links to unexisting pages) or a:not(.new) (to select links to existing pages). Furthermore, since the number of expensive parser functions that can be used on a single page is controlled by <tvar|ExpensiveParserFunctionsLimit>$wgExpensiveParserFunctionLimit </>, one can also increase the limit in LocalSettings.php if needed.

ifexist and wanted pages

A page that does not exist and is tested for using #ifexist will end up on the Wanted Pages. </translate>

#rel2abs

<translate> This function converts a relative file path into an absolute filepath. </translate>

{{#rel2abs: path }}

{{#rel2abs: path | base path }}

<translate> Within the <tvar|1>path</> input, the following syntax is valid: </translate>

• . → <translate> the current level</translate>
• .. → <translate> go up one level</translate>
• /foo → <translate> go down one level into the subdirectory <tvar|1>/foo</></translate>

<translate> If the <tvar|1>base path</> is not specified, the full page name of the page will be used instead: </translate>

{{#rel2abs: /quok | Ajuda:Foo/bar/baz }} → Ajuda:Foo/bar/baz/quok

{{#rel2abs: ./quok | Ajuda:Foo/bar/baz }} → Ajuda:Foo/bar/baz/quok

{{#rel2abs: ../quok | Ajuda:Foo/bar/baz }} → Ajuda:Foo/bar/quok

{{#rel2abs: ../. | Ajuda:Foo/bar/baz }} → Ajuda:Foo/bar

<translate> Invalid syntax, such as <tvar|code1>/.</> or <tvar|code2>/./</>, is ignored.</translate> <translate> Since no more than two consecutive full stops are permitted, sequences such as these can be used to separate successive statements:</translate>

{{#rel2abs: ../quok/. | Ajuda:Foo/bar/baz }} → Ajuda:Foo/bar/quok

{{#rel2abs: ../../quok | Ajuda:Foo/bar/baz }} → Ajuda:Foo/quok

{{#rel2abs: ../../../quok | Ajuda:Foo/bar/baz }} → quok

{{#rel2abs: ../../../../quok | Ajuda:Foo/bar/baz }} →

#switch

See also : w:Help:Switch parser function

<translate> This function compares one input value against several test cases, returning an associated string if a match is found. </translate>

{{#switch: comparison string
 | case = result
 | case = result
 | ...
 | case = result
 | default result
}}

<translate> Examples: </translate>

{{#switch: baz | foo = Foo | baz = Baz | Bar }} → Baz

{{#switch: foo | foo = Foo | baz = Baz | Bar }} → Foo

{{#switch: zzz | foo = Foo | baz = Baz | Bar }} → Bar

<translate> <tvar|switch>#switch</> with partial transclusion tags can affect a configuration file that enables an editor unfamiliar with template coding to view and edit configurable elements.

Default

The default result is returned if no case string matches the comparison string: </translate>

{{#switch: test | foo = Foo | baz = Baz | Bar }} → Bar

<translate> In this syntax, the default result must be the last parameter and must not contain a raw equals sign (an equals sign without <tvar|1>{{}}</>).</translate> <translate> If it does, it will be treated as a case comparison, and no text will display if no cases match.</translate> <translate> This is because the default value has not been defined (is empty).</translate> <translate> If a case matches however, its associated string will be returned.</translate>

{{#switch: test | Bar | foo = Foo | baz = Baz }} →

{{#switch: test | foo = Foo | baz = Baz | B=ar }} →

{{#switch: test | test = Foo | baz = Baz | B=ar }} → Foo

<translate> Alternatively, the default result may be explicitly declared with a case string of "#default". </translate>

{{#switch: comparison string
 | case = result
 | case = result
 | ...
 | case = result
 | #default = default result
}}

<translate> Default results declared in this way may be placed anywhere within the function: </translate>

{{#switch: test | foo = Foo | #default = Bar | baz = Baz }} → Bar

<translate> If the default parameter is omitted and no match is made, no result is returned: </translate>

{{#switch: test | foo = Foo | baz = Baz }} →

<translate>

Grouping results

It is possible to have 'fall through' values, where several case strings return the same result string. This minimizes duplication. </translate>

{{#switch: comparison string
 | case1 = result1
 | case2 
 | case3 
 | case4 = result234
 | case5 = result5
 | case6 
 | case7 = result67
 | #default = default result
}}

<translate> Here cases 2, 3 and 4 all return result234; cases 6 and 7 both return result67.</translate> <translate> The "<tvar|1>#default = </>" in the last parameter may be omitted in the above case.</translate>

<translate>

Use with parameters

</translate> <translate> The function may be used with parameters as the test string.</translate> <translate> In this case, it is not necessary to place the pipe after the parameter name, because it is very unlikely that you will choose to set a case to be the string "<tvar|1>{{{parameter name}}}</>".</translate> (<translate> This is the value the parameter will default to if the pipe is absent and the parameter doesn't exist or have a value.</translate> <translate> See <tvar|1>Help:Parser functions in templates </>.</translate>)

{{#switch: {{{1}}} | foo = Foo | baz = Baz | Bar }}

<translate> In the above case, if <tvar|1>{{{1}}}</> equals <tvar|2>foo</>, the function will return <tvar|3>Foo</>.</translate> <translate> If it equals <tvar|1>baz</>, the function will return <tvar|2>Baz</>.</translate> <translate> If the parameter is empty or does not exist, the function will return <tvar|1>Bar</>.</translate>

<translate> As in the section above, cases can be combined to give a single result. </translate>

{{#switch: {{{1}}} | foo | zoo | roo = Foo | baz = Baz | Bar }}

<translate> Here, if <tvar|1>{{{1}}}</> equals <tvar|2>foo</>, <tvar|3>zoo</> or <tvar|4>roo</>, the function will return <tvar|5>Foo</>.</translate> <translate> If it equals <tvar|1>baz</>, the function will return <tvar|2>Baz</>.</translate> <translate> If the parameter is empty or does not exist, the function will return <tvar|1>Bar</>.</translate>

<translate> Additionally, the default result can be omitted if you do not wish to return anything if the test parameter value does not match any of the cases. </translate>

{{#switch: {{{1}}} | foo = Foo | bar = Bar }}

<translate> In this case, the function returns an empty string unless <tvar|1>{{{1}}}</> exists and equals <tvar|2>foo</> or <tvar|3>bar</>, in which case it returns <tvar|4>Foo</> or <tvar|5>Bar</>, respectively.

This has the same effect as declaring the default result as empty. </translate>

{{#switch: {{{1}}} | foo | zoo | roo = Foo | baz = Baz | }}

<translate> If for some reason you decide to set a case as "<tvar|1>{{{parameter name}}}</>", the function will return that case's result when the parameter doesn't exist or doesn't have a value.</translate> <translate> The parameter would have to exist and have a value other than the string "<tvar|1>{{{parameter name}}}</>" to return the function's default result.</translate>

<translate> (when <tvar|1>{{{1}}}</> doesn't exist or is empty):</translate>

{{#switch: {{{1}}} | {{{1}}} = Foo | baz = Baz | Bar }} → Foo

<translate> (when <tvar|1>{{{1}}}</> has the value "test"):</translate>

{{#switch: {{{1}}} | {{{1}}} = Foo | baz = Baz | Bar }} → Bar

<translate> (when <tvar|1>{{{1}}}</> has the value "<tvar|2>{{{1}}}</>"):</translate>

{{#switch: {{{1}}} | {{{1}}} = Foo | baz = Baz | Bar }} → Foo

<translate> In this hypothetical case, you would need to add the pipe to the parameter (<tvar|1>{{{1|}}}</>).

Comparison behavior

As with <tvar|ifeq>#ifeq</>, the comparison is made numerically if both the comparison string and the case string being tested are numeric; or as a case-sensitive string otherwise: </translate>

{{#switch: 0 + 1 | 1 = one | 2 = two | three}} → three

{{#switch: {{#expr: 0 + 1}} | 1 = one | 2 = two | three}} → one

{{#switch: a | a = A | b = B | C}} → A

{{#switch: A | a = A | b = B | C}} → C

<translate> A case string may be empty: </translate>

{{#switch: | = Nothing | foo = Foo | Something }} → Nothing

<translate> Once a match is found, subsequent cases are ignored: </translate>

{{#switch: b | f = Foo | b = Bar | b = Baz | }} → Bar

<translate>

Raw equal signs

"Case" strings cannot contain raw equals signs. To work around this, create a template <tvar|tpl>{{}}

Descrição

Esta predefinição tem a função de criar ligações para outras predefinições. Podem ser usados os redirecionamentos {{Lp}} ou {{tl}} mais facilmente.

Uso

{{Lp|exemplo}} gera {{exemplo}}

== Erro: Não foi indicada nenhuma página na chamada de .

==

• {{Lpu}} ou {{tlu}} – para ligações semelhantes a páginas que não são predefinições
• {{Lpp}} ou {{tlp}} – para indicar a necessidade de um parâmetro
• {{Lpx}} ou {{tlx}} – para indicar até doze parâmetros
• {{Lps}} ou {{tls}} – para indicar que a predefinição deve ser substituída

</> containing a single equals sign: <tvar|code1>=</>, or replace equals sign with html code <tvar|code2>=</>.

Example: </translate>

{{#switch: 1=2

 | 1=2 = raw

 | 1<nowiki>=</nowiki>2 = nowiki

 | 1{{=}}2 = template

 | default

}} → template

{{#switch: 1=2

 | 1=2 = html

 | default

}} → html

<translate>

Replacing #ifeq

#switch can be used to reduce [[<tvar|help>Special:MyLanguage/Help:Expansion depth</>|expansion depth]].

For example: </translate>

• {{#switch:{{{1}}} |condition1=branch1 |condition2=branch2 |condition3=branch3 |branch4}}

<translate> is equivalent to </translate>

• {{#ifeq:{{{1}}}|condition1 |branch1 |{{#ifeq:{{{1}}}|condition2 |branch2 |{{#ifeq:{{{1}}}|condition3 |branch3 |branch4}}}}}}

<translate> i.e. deep nesting, linear: </translate>

{{#ifeq:{{{1}}}|condition1
  |<!--then-->branch1
  |<!--else-->{{#ifeq:{{{1}}}|condition2
                |<!--then-->branch2
                |<!--else-->{{#ifeq:{{{1}}}|condition3
                              |<!--then-->branch3
                              |<!--else-->branch4}}}}}}

<translate> On the other hand, the switch replacement could be complicated/impractical for IFs nested in both branches (shown with alternatives of indentation, indented on both sides), making full symmetrical tree: </translate>

{{#ifeq:{{{1}}}|condition1
 |<!--then-->branch1t{{
  #ifeq:{{{1}}}|condition2
   |<!--then-->branch1t2t{{#ifeq:{{{1}}}|condition4|<!--then-->branch1t2t4t|<!--else-->branch1t2t4e}}
   |<!--else-->branch1t2e{{#ifeq:{{{1}}}|condition5|<!--then-->branch1t2e5t|<!--else-->branch1t2e5e}}
  }}
 |<!--else-->branch1e{{#ifeq:{{{1}}}|condition3
   |<!--then-->branch1e3t{{#ifeq:{{{1}}}|condition6|branch1e3t6t|branch1e3t6e}}
   |<!--else-->branch1e3e{{
    #ifeq:{{{1}}}|condition7
     |branch1e3e7t
     |branch1e3e7t
    }}
  }}
}}

#time

<translate> Code</translate>	<translate> Description</translate>	<translate> Current output </translate>
<translate> Year</translate>
Y	<translate> 4-digit year.</translate>	2024
y	<translate> 2-digit year.</translate>	24
L	<translate> 1 if it's a leap year, 0 if not.</translate>	1
o	<translate> ISO-8601 year of the specified week.</translate>	2024
<translate> Month</translate>
n	<translate> Month index, not zero-padded.</translate>	4
m	<translate> Month index, zero-padded.</translate>	04
M	<translate> An abbreviation of the month name, in the site language.</translate>	abr.
F	<translate> The full month name in the site language.</translate>	abril
xg	<translate> Output the full month name in the genitive form for site languages that distinguish between genitive and nominative forms. This option is useful for many Slavic languages like Polish, Russian, Belarusian, Czech, Slovak, Slovene, Ukrainian, etc.</translate>	<translate> For Polish:</translate> {{#time:F Y|June 2010|pl}} → czerwiec 2010 <translate> (nominative)</translate> {{#time:d xg Y|20 June 2010|pl}} → 20 czerwca 2010 <translate> (genitive)</translate>
<translate> Day of the month or the year</translate>
j	<translate> Day of the month, not zero-padded.</translate>	24
d	<translate> Day of the month, zero-padded.</translate>	24
z	<translate> Day of the year (January 1 = 0). To get the ISO day of the year add 1.</translate>	114
<translate> Week and day of the week</translate>
W	<translate> ISO 8601 week number, zero-padded.</translate>	17
N	<translate> ISO 8601 day of the week (Monday = 1, Sunday = 7).</translate>	3
w	<translate> Number of the day of the week (Sunday = 0, Saturday = 6).</translate>	3
D	<translate> An abbreviation for the day of the week. Rarely internationalized.</translate>	qua
l	<translate> The full weekday name. Rarely internationalized.</translate>	quarta-feira
<translate> Hour</translate>
a	<translate> "am" during the morning (00:00:00 → 11:59:59), "pm" otherwise (12:00:00 → 23:59:59).</translate>	am
A	<translate> Uppercase version of a above.</translate>	AM
g	<translate> Hour in 12-hour format, not zero-padded.</translate>	4
h	<translate> Hour in 12-hour format, zero-padded.</translate>	04
G	<translate> Hour in 24-hour format, not zero-padded.</translate>	4
H	<translate> Hour in 24-hour format, zero-padded.</translate>	04
<translate> Minutes and seconds</translate>
i	<translate> Minutes past the hour, zero-padded.</translate>	03
s	<translate> Seconds past the minute, zero-padded.</translate>	20
U	<translate> Unix time.</translate> <translate> Seconds since January 1 1970 00:00:00 GMT.</translate>	1713931400
<translate> Timezone (as of 1.22wmf2)</translate>
e	<translate> Timezone identifier.</translate>	UTC
I	<translate> Whether or not the date is in daylight savings time.</translate>	0
O	<translate> Difference to Greenwich time (GMT)</translate>	+0000
P	<translate> Difference to Greenwich time (GMT), with colon</translate>	+00:00
T	<translate> Timezone abbreviation.</translate>	UTC
Z	<translate> Timezone offset in seconds.</translate>	0
<translate> Miscellaneous</translate>
t	<translate> Number of days in the current month.</translate>	30
c	iso8601>Y-m-d"T"H:i:s+00:00</>.</translate>	2024-04-24T04:03:20+00:00
r	<translate> RFC 5322 formatted date, equivalent to <tvar|rfc5322>D, j M Y H:i:s +0000</>, with weekday name and month name not internationalized.</translate>	Wed, 24 Apr 2024 04:03:20 +0000
<translate> Non-Gregorian calendars</translate>
<translate> Islamic</translate>
xmj	<translate> Day of the month.</translate>	15
xmF	<translate> Full month name.</translate>	Shawwal
xmn	<translate> Month index.</translate>	10
xmY	<translate> Full year.</translate>	1445
<translate> Iranian (Jalaly)</translate>
xit	<translate> Number of days in the month.</translate>	31
xiz	<translate> Day of the year.</translate>	35
xij	<translate> Day of the month.</translate>	5
xiF	<translate> Full month name.</translate>	Ordibehesht
xin	<translate> Month index.</translate>	2
xiY	<translate> Full year.</translate>	1403
xiy	<translate> 2-digit year.</translate>	03
<translate> Hebrew</translate>
xjj	<translate> Day of the month.</translate>	16
xjF	<translate> Full month name.</translate>	Nisan
xjt	<translate> Number of days in month.</translate>	30
xjx	<translate> Genitive form of the month name.</translate>	Nissan
xjn	<translate> Month number.</translate>	7
xjY	<translate> Full year.</translate>	5784
<translate> Thai solar</translate>
xkY	<translate> Full year in Thai solar calendar. For years before 1941 the dates in Jan-Mar range are not calculated properly.</translate>	2567
<translate> Minguo/Juche year</translate>
xoY	<translate> Full year.</translate>	113
<translate> Japanese nengo</translate>
xtY	<translate> Full year.</translate>	令和6
<translate> Flags</translate>
xn	<translate> Format the next numeric code as a raw ASCII number.</translate>	time>{{#time:H, xnH}}</> produces <tvar|hindi>०६, 06</>.</translate>
xN	<translate> Like xn, but as a toggled flag, which endures until the end of the string or until the next appearance of xN in the string.</translate>
xr	<translate> Format the next number as a roman numeral. Only works for numbers up to 10,000 (up to 3,000 in pre MediaWiki 1.20).</translate>	{{#time:xrY}} → MMXXIV
xh	<translate> Format the next number as a Hebrew numeral.</translate>	{{#time:xhY}} → ב'כ"ד

<translate> This parser function takes a date and/or time (in the Gregorian calendar) and formats it according to the syntax given. A date/time object can be specified; the default is the value of the [[<tvar|magic>Special:MyLanguage/Help:Magic words#Date and time</>|magic word]] <tvar|currenttimestamp>{{CURRENTTIMESTAMP}}</> – that is, the time the page was last rendered into HTML. </translate>

{{#time: format string }}

{{#time: format string | date/time object }}

{{#time: format string | date/time object | language code }}

{{#time: format string | date/time object | language code | local }}

<translate> The list of accepted formatting codes is given in the table to the right. Any character in the formatting string that is not recognized is passed through unaltered; this applies also to blank spaces (the system does not need them for interpreting the codes). There are also two ways to escape characters within the formatting string:

1. A backslash followed by a formatting character is interpreted as a single literal character
2. Characters enclosed in double quotes are considered literal characters, and the quotes are removed.

In addition, the digraph xx is interpreted as a single literal "x". </translate>

{{#time: Y-m-d }} → 2024-04-24

{{#time: [[Y]] m d }} → 2024 04 24

{{#time: [[Y (year)]] }} → 2024 (24UTCamWed, 24 Apr 2024 04:03:20 +0000)

{{#time: [[Y "(year)"]] }} → 2024 (year)

{{#time: i's" }} → 03'20"

<translate> The date/time object can be in any format accepted by PHP's <tvar|strtotime>strtotime()</> function. Both absolute (eg 20 December 2000) and relative (eg +20 hours) times are accepted. </translate>

{{#time: r|now}} → Wed, 24 Apr 2024 04:03:20 +0000

{{#time: r|+2 hours}} → Wed, 24 Apr 2024 06:03:20 +0000

{{#time: r|now + 2 hours}} → Wed, 24 Apr 2024 06:03:20 +0000

{{#time: r|20 December 2000}} → Wed, 20 Dec 2000 00:00:00 +0000

{{#time: r|December 20, 2000}} → Wed, 20 Dec 2000 00:00:00 +0000

{{#time: r|2000-12-20}} → Wed, 20 Dec 2000 00:00:00 +0000

{{#time: r|2000 December 20}} →

<translate> The language code in ISO 639-3 (?) allows the string to be displayed in the chosen language </translate>

{{#time:d F Y|1988-02-28|nl}} → 28 februari 1988

{{#time:l|now|uk}} → середа

{{#time:d xg Y|20 June 2010|pl}} → 20 czerwca 2010

<translate> The <tvar|1>local</> parameter specifies if the date/time object refers to the local timezone or to UTC.

This is a boolean parameters: its value is determined by casting the value of the argument (see the [<tvar|url>https://php.net/language.types.boolean#language.types.boolean.casting</> official PHP documentation] for details on how string are cast to boolean values). </translate>

<translate> See the following examples for details: </translate>

{{#time: Y F d H:i:s|now|it|0}} → 2024 aprile 24 04:03:20

{{#time: Y F d H:i:s|now|it|1}} → 2024 aprile 24 01:03:20

{{#time: Y F d H:i:s|+2 hours||0}} → 2024 abril 24 06:03:20

{{#time: Y F d H:i:s|+2 hours||1}} → 2024 abril 24 03:03:20

{{#time:c|2019-05-16T17:05:43+02:00|it}} → 2019-05-16T15:05:43+00:00

{{#time:c|2019-05-16T17:05:43+02:00|it|0}} → 2019-05-16T15:05:43+00:00

{{#time:c|2019-05-16T17:05:43+02:00|it|true}} → 2019-05-16T12:05:43-03:00

<translate> If you've calculated a Unix timestamp, you may use it in date calculations by pre-pending an @ symbol. </translate>

{{#time: U | now }} → 1713931400

{{#time: r | @1713931400 }} → Wed, 24 Apr 2024 04:03:20 +0000

<translate> Full or partial absolute dates can be specified; the function will "fill in" parts of the date that are not specified using the current values: </translate>

{{#time: Y | January 1 }} → 2024

<translate> A four-digit number is always interpreted as a year, never as hours and minutes: </translate>

{{#time: Y m d H:i:s | 1959 }} → 1959 04 24 00:00:00

<translate> A six-digit number is interpreted as hours, minutes and seconds if possible, but otherwise as an error (not, for instance, a year and month): </translate>

{{#time: Y m d H:i:s | 195909 }} → 2024 04 24 19:59:09 <translate> Input is treated as a time rather than a year+month code.</translate>

{{#time: Y m d H:i:s | 196009 }} → <translate> Although 19:60:09 is not a valid time, 196009 is not interpreted as September 1960.</translate>

<translate> The function performs a certain amount of date mathematics: </translate>

{{#time: d F Y | January 0 2008 }} → 31 dezembro 2007

{{#time: d F | January 32 }} →

{{#time: d F | February 29 2008 }} → 29 fevereiro

{{#time: d F | February 29 2007 }} → 01 março

{{#time:Y-F|now -1 months}} → 2024-março

<translate> The total length of the format strings of the calls of <tvar|time>#time</> is limited to 6000 characters.

Time Zone issue

There is a bug in this #time parser function (more specifically in PHP DateTime) that does not allow the passing-in of non-integers as relative time zone offsets. This issue does not apply when using an on-the-hour time zone, such as EDT. For example: </translate>

• {{#time:g:i A | -4 hours }} → 12:03 AM

<translate> However, India is on a +5.5 hours time offset from UTC, and thus using its time zone will not normally allow the correct calculation of a relative time zone offset. Here's what happens: </translate>

• {{#time:g:i A | +5.5 hours }} → 4:03 AM

<translate> To workaround this issue, simply convert the time into minutes or seconds, like this: </translate>

• {{#time:g:i A | +330 minutes }} → 9:33 AM
• {{#time:g:i A | +19800 seconds }} → 9:33 AM

<translate> (Tim Starling, the developer of this function, provided the exact syntax for this solution.) </translate>

#timel

<translate> This function is identical to <tvar|time>{{#time: ... }}</>, when the <tvar|2>local</> parameter is set to <tvar|3>true</>, so it always uses the local time of the wiki (as set in <tvar|1>$wgLocaltimezone </>).

Syntax of the function is: </translate>

{{#timel: format string }}

{{#timel: format string | date/time object }}

{{#timel: format string | date/time object | language code }}

Arquivo:Time-Timel.png

<translate> Example of the use of #time and #timel parser functions from a server where the timezone is not UTC</translate>

<translate> For instance, see the following examples: </translate>

{{#time:c|now|it}} → 2024-04-24T04:03:20+00:00

{{#time:c|now|it|0}} → 2024-04-24T04:03:20+00:00

{{#time:c|now|it|1}} → 2024-04-24T01:03:20-03:00

{{#timel:c|now|it}} → 2024-04-24T01:03:20-03:00

Arquivo:Maldiskusjon Sommertid–Wikipedia.jpg

no-wp>https://no.wikipedia.org/wiki/Maldiskusjon:Sommertid</></translate>

#titleparts

<translate> This function separates a page title into segments based on slashes, then returns some of those segments as output. </translate>

<translate> <tvar|code0>{{#titleparts:</> pagename <tvar|code1>|</> number of segments to return <tvar|code2>|</> first segment to return <tvar|code3>}}</></translate>

<translate> If the number of segments to return parameter is not specified, it defaults to "0", which returns all the segments from the first segment to return (included). If the first segment to return parameter is not specified or is "0", it defaults to "1": </translate>

{{#titleparts: Discussão:Foo/bar/baz/quok }} → Discussão:Foo/bar/baz/quok

{{#titleparts: Discussão:Foo/bar/baz/quok | 1 }} → Discussão:Foo See also {{ROOTPAGENAME }}.

{{#titleparts: Discussão:Foo/bar/baz/quok | 2 }} → Discussão:Foo/bar

{{#titleparts: Discussão:Foo/bar/baz/quok | 2 | 2 }} → bar/baz

{{#titleparts: Discussão:Foo/bar/baz/quok | | 2 }} → bar/baz/quok

{{#titleparts: Discussão:Foo/bar/baz/quok | | 5 }} →

<translate> Negative values are accepted for both values. Negative values for the number of segments to return parameter effectively 'strips' segments from the end of the string. Negative values for the first segment to return translates to "start with this segment counting from the right": </translate>

{{#titleparts: Discussão:Foo/bar/baz/quok | -1 }} → Discussão:Foo/bar/baz <translate> Strips one segment from the end of the string.</translate> <translate> See also <tvar|1>{{BASEPAGENAME}}</>.</translate>

{{#titleparts: Discussão:Foo/bar/baz/quok | -4 }} → <translate> Strips all 4 segments from the end of the string</translate>

{{#titleparts: Discussão:Foo/bar/baz/quok | -5 }} → <translate> Strips 5 segments from the end of the string (more than exist)</translate>

{{#titleparts: Discussão:Foo/bar/baz/quok | | -1 }} → quok <translate> Returns last segment.</translate> <translate> See also <tvar|1>{{SUBPAGENAME}}</>.</translate>

{{#titleparts: Discussão:Foo/bar/baz/quok | -1 | 2 }} → bar/baz <translate> Strips one segment from the end of the string, then returns the second segment and beyond</translate>

{{#titleparts: Discussão:Foo/bar/baz/quok | -1 | -2 }} → baz <translate> Start copying at the second last element; strip one segment from the end of the string</translate>

<translate> Before processing, the pagename parameter is HTML-decoded: if it contains some standard HTML character entities, they will be converted to plain characters (internally encoded with UTF-8, i.e. the same encoding as in the MediaWiki source page using this parser function). </translate>

<translate> For example, any occurrence of <tvar|q1>"</>, <tvar|q2>"</>, or <tvar|q3>"</> in pagename will be replaced by <tvar|q>"</>.</translate>

<translate> No other conversion from HTML to plain text is performed, so HTML tags are left intact at this initial step even if they are invalid in page titles.</translate>

<translate> Then the decoded pagename is canonicalized into a standard page title supported by MediaWiki, as much as possible: </translate>

1. <translate> All underscores are automatically replaced with spaces:</translate>

   {{#titleparts: Discussão:Foo/bah_boo|1|2}} → bah boo <translate> Not bah_boo, despite the underscore in the original.</translate>

2. <translate> The string is split a maximum of 25 times; further slashes are ignored and the 25th element will contain the rest of the string. The string is also limited to 255 characters, as it is treated as a page title:</translate>

   {{#titleparts: a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/aa/bb/cc/dd/ee | 1 | 25 }} → y/z/aa/bb/cc/dd/ee

   <translate> If for whatever reason you needed to push this function to its limit, although very unlikely, it is possible to bypass the 25 split limit by nesting function calls:</translate>

   {{#titleparts: {{#titleparts: a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/aa/bb/cc/dd/ee| 1 | 25 }} | 1 | 2}} → z

3. <translate> Finally the first substring is capitalized according to the capitalization settings of the local wiki (if that substring also starts by a local namespace name, that namespace name is also normalized).</translate>

   {{#titleparts: talk:a/b/c }} → Discussão:A/b/c

<translate>

StringFunctions

All of these functions (<tvar|1>len, pos, rpos, sub, replace, explode</>) are [[<tvar|2>Special:Code/MediaWiki/50997</>|integrated]] from the <tvar|3>StringFunctions</> extension, but are only available if an administrator sets <tvar|4>$wgPFEnableStringFunctions = true;</> in <tvar|5>LocalSettings.php</>.

All of these functions operate in O(n) time complexity, making them safe against DoS attacks. </translate>

#len

<translate> The <tvar|1>#len</> function returns the length of the given string.</translate> <translate> The syntax is:</translate>

{{#len:string}}

<translate> The return value is always a number of characters in the source string (after expansions of template invocations, but before conversion to HTML).</translate> <translate> If no string is specified, the return value is zero.</translate>

#pos

<translate> The <tvar|1>#pos</> function returns the position of a given search term within the string.</translate> <translate> The syntax is:</translate>

{{#pos:string|<translate> search term</translate>|offset}}

<translate> The <tvar|1>offset</> parameter, if specified, tells a starting position where this function should begin searching.

If the search term is found, the return value is a zero-based integer of the first position within the string.

If the search term is not found, the function returns an empty string. </translate>

#rpos

<translate> The <tvar|1>#rpos</> function returns the last position of a given search term within the string.</translate> <translate> The syntax is:</translate>

 {{#rpos:string|<translate> search term</translate>}}

<translate> If the search term is found, the return value is a zero-based integer of its last position within the string.

If the search term is not found, the function returns -1. </translate>

#sub

<translate> The <tvar|1>#sub</> function returns a substring from the given string.</translate> <translate> The syntax is:</translate>

{{#sub:string|start|length}}

<translate> The <tvar|1>start</> parameter, if positive (or zero), specifies a zero-based index of the first character to be returned. </translate>

<translate> Example:</translate> <translate> <tvar|1>{{#sub:Icecream|3}}</> returns <tvar|2>cream</>.</translate>

<translate> <tvar|1>{{#sub:Icecream|0|3}}</> returns <tvar|2>Ice</>.

If the <tvar|1>start</> parameter is negative, it specifies how many characters from the end should be returned. </translate>

<translate> Example:</translate> <translate> <tvar|1>{{#sub:Icecream|-3}}</> returns <tvar|2>eam</>.</translate>

<translate> The <tvar|1>length</> parameter, if present and positive, specifies the maximum length of the returned string. </translate>

<translate> Example:</translate> <translate> <tvar|1>{{#sub:Icecream|3|3}}</> returns <tvar|2>cre</>.</translate>

<translate> If the <tvar|1>length</> parameter is negative, it specifies how many characters will be omitted from the end of the string. </translate>

<translate> Example:</translate> <translate> <tvar|1>{{#sub:Icecream|3|-3}}</> returns <tvar|2>cr</>.</translate>

<translate> If the <tvar|1>start</> parameter is negative, it specifies how many characters from the end should be returned.</translate> <translate> The <tvar|1>length</> parameter, if present and positive, specifies the maximum length of the returned string from the starting point.</translate>

<translate> Example:</translate> <translate> <tvar|1>{{#sub:Icecream|-3|2}}</> returns <tvar|2>ea</>.</translate>

#replace

<translate> The <tvar|1>#replace</> function returns the given string with all occurrences of a search term replaced with a replacement term. </translate>

{{#replace:string|search term|replacement term}}

<translate> If the <tvar|1>search term</> is unspecified or empty, a single space will be searched for.

If the <tvar|1>replacement term</> is unspecified or empty, all occurrences of the <tvar|2>search term</> will be removed from the string. </translate>

<translate> Case-insensitive replace</translate>

<translate> Currently the syntax doesn't provide a switch to toggle case-sensitivity setting.</translate> <translate> But you may make use of [[<tvar|1>Special:MyLanguage/Help:Magic_words#Formatting</>|magic words of formatting]] as a workaround.</translate> <translate> (e.g. <tvar|1>{{lc:</>your_string_here<tvar|2>}}</>)</translate> <translate> For example, if you want to remove the word "<tvar|1>Category:</>" from the string regardless of its case, you may type:</translate>

{{#replace:{{lc:{{{1}}}}}|category:|}}

<translate> But the disadvantage is that the output will become all lower-case.</translate> <translate> If you want to keep the casing after replacement, you have to use multiple nesting levels (i.e. multiple replace calls) to achieve the same thing.</translate>

#explode

<translate> The <tvar|1>#explode</> function splits the given string into pieces and then returns one of the pieces.</translate> <translate> The syntax is:</translate>

{{#explode:string|delimiter|position|limit}}

<translate> The <tvar|1>delimiter</> parameter specifies a string to be used to divide the <tvar|2>string</> into pieces.</translate> <translate> This <tvar|1>delimiter</> string is then not part of any piece, and when two <tvar|1>delimiter</> strings are next to each other, they create an empty piece between them.</translate> <translate> If this parameter is not specified, a single space is used.</translate> <translate> The <tvar|1>limit</> parameter is available in ParserFunctions only, not the standalone StringFunctions version, and allows you to limit the number of parts returned, with all remaining text included in the final part.</translate>

<translate> The <tvar|1>position</> parameter specifies which piece is to be returned.</translate> <translate> Pieces are counted from 0.</translate> <translate> If this parameter is not specified, the first piece is used (piece with number 0).</translate> <translate> When a negative value is used as <tvar|1>position</>, the pieces are counted from the end.</translate> <translate> In this case, piece number -1 means the last piece.</translate> <translate> Examples:</translate>

• {{#explode:And if you tolerate this| |2}} <translate> returns</translate> you
• {{#explode:String/Functions/Code|/|-1}} <translate> returns</translate> Code
• {{#explode:Split%By%Percentage%Signs|%|2}} <translate> returns</translate> Percentage
• {{#explode:And if you tolerate this| |2|3}} <translate> returns</translate> you tolerate this

<translate> The return value is the position-th piece. If there are fewer pieces than the position specifies, an empty string is returned. </translate>

#urldecode

<translate> <tvar|1>#urldecode</> converts the escape characters from an 'URL encoded' string string back to readable text. The syntax is: </translate>

{{#urldecode:<translate> value</translate>}}

<translate> Notes:

• This function works by directly exposing PHP's <tvar|1>urldecode()</> function.
• A character-code-reference can be found [<tvar|2>http://www.w3schools.com/tags/ref_urlencode.asp</> at www.w3schools.com].
• The opposite, <tvar|3>urlencode</>, has been integrated into MediaWiki as of version 1.18; for examples, see {{<tvar|4>ll|Help:Magic words#URL data</>|Help:Magic Words}}.
• urldecode was merged from Stringfunctions in 2010, by commit <tvar|5>1b75afd18d3695bdb6ffbfccd0e4aec064785363</>

Limits

This module defines three global settings: </translate>

• $wgStringFunctionsLimitSearch
• $wgStringFunctionsLimitReplace
• $wgStringFunctionsLimitPad

<translate> These are used to limit some parameters of some functions to ensure the functions operate in O(n) time complexity, and are therefore safe against DoS attacks. </translate>

$wgStringFunctionsLimitSearch

<translate> This setting is used by <tvar|1>#pos</>, <tvar|2>#rpos</>, <tvar|3>#replace</>, and <tvar|4>#explode</>. All these functions search for a substring in a larger string while they operate, which can run in O(n*m) and therefore make the software more vulnerable to DoS attacks. By setting this value to a specific small number, the time complexity is decreased to O(n).

This setting limits the maximum allowed length of the string being searched for.

The default value is 30 multibyte characters. </translate>

$wgStringFunctionsLimitReplace

<translate> This setting is used by <tvar|1>#replace</>. This function replaces all occurrences of one string for another, which can be used to quickly generate very large amounts of data, and therefore makes the software more vulnerable to DoS attacks. This setting limits the maximum allowed length of the replacing string.

The default value is 30 multibyte characters.

General points

Substitution

Parser functions can be [[<tvar|help>Special:MyLanguage/Help:Substitution</>|substituted]] by prefixing the hash character with <tvar|subst>subst:</>: </translate>

{{subst:#ifexist: Ajuda:Extensão:ParserFunctions | [[Ajuda:Extensão:ParserFunctions]] | Ajuda:Extensão:ParserFunctions }} → <translate> the code [[Ajuda:Extensão:ParserFunctions]] will be inserted in the wikitext since the page Ajuda:Extensão:ParserFunctions exists.</translate>

<translate> Substitution does not work within <tvar|code1><ref>…</ref> </>, you can use <tvar|code2>{{subst:#tag:ref|…}}</> for this purpose.

Redirects

Especially <tvar|time>{{#time:…|now-…}}</> could be handy in {{<tvar|redirects>ll|Help:Redirects</>|redirects}} to pages including dates, but this does not work.

Escaping pipe characters in tables

Parser functions will mangle {{<tvar|help-tables>ll|Help:Tables</>|wikitable}} syntax and pipe characters (<tvar|pipe>|</>), treating all the raw pipe characters as parameter dividers. To avoid this, most wikis used a template <tvar|template>Predefinição:!</> with its contents only a raw pipe character (<tvar|pipe>|</>), since MW 1.24 a {{<tvar|help-magic>ll|Help:Magic words#Other|{{!}}</> magic word}} replaced this kludge. This 'hides' the pipe from the MediaWiki parser, ensuring that it is not considered until after all the templates and variables on a page have been expanded. It will then be interpreted as a table row or column separator. Alternatively, raw HTML table syntax can be used, although this is less intuitive and more error-prone.

You can also escape the pipe character for display as a plain, uninterpreted character using an HTML entity: <tvar|entity>|</> . </translate>

<translate> Description</translate>	<translate> You type</translate>	<translate> You get</translate>
<translate> Escaping pipe character as table row/column separator</translate>	{{!}}
<translate> Escaping pipe character as a plain character</translate>	&#124;

<translate>

Stripping whitespace

Whitespace, including newlines, tabs, and spaces, is stripped from the beginning and end of all the parameters of these parser functions. If this is not desirable, comparison of strings can be done after putting them in quotation marks. </translate>

{{#ifeq: foo           |           foo | equal | not equal }} → equal

{{#ifeq: "foo          " | "          foo" | equal | not equal }} → not equal

<translate> To prevent the trimming of then and else parts, see <tvar|meta-tpl-if>m:Template:If</>. Some people achieve this by using <{{<tvar|markup-nw>ll|Wiki markup#Nowiki</>|nowiki}}> </nowiki> instead of spaces. </translate>

foo{{#if:|| bar }}foo → foobarfoo

foo{{#if:||<nowiki /> bar <nowiki />}}foo → foo bar foo

<translate> However, this method can be used to render a single whitespace character only, since the parser squeezes multiple whitespace characters in a row into one. </translate>

<span style="white-space: pre;">foo{{#if:||<nowiki/> bar <nowiki/>}}foo</span>

→

foo bar foo

<translate> In this example, the white-space: pre style is used to force the whitespace to be preserved by the browser, but even with it the spaces are not shown. This happens because the spaces are stripped by the software, before being sent to the browser.

It is possible to workaround this behavior replacing whitespaces with   (breakable space) or   (non-breakable space), since they are not modified by the software: </translate>

<span style="white-space: pre;">foo{{#if:||&#32;&#32;&#32;bar&#32;&#32;&#32;}}foo</span> → foo bar foo

foo{{#if:||   bar   }}foo → foo   bar   foo

<translate>

See also

</translate>

• Help:Parser functions in templates
• <translate> m:Help:Calculation</translate>
• <translate> m:Help:Newlines and spaces</translate>
• <translate> m:Help:Comparison between ParserFunctions syntax and TeX syntax</translate>
• Help:Magic words
• Parser function hooks , an (incomplete) list of parser functions added by core and extensions.

<translate>

• <tvar|1>Module:String</> obsoleting <tvar|2>Extension:StringFunctions </>

</translate>

• Extension:PhpTags
• Parser functions for Wikibase (the extensions that enables Wikidata): d:Special:MyLanguage/Wikidata:How to use data on Wikimedia projects

<translate>

References

</translate>

[[Category:Extension help{{#translation:}}|ParserFunctions]] [[Category:Magic words{{#translation:}}]]