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vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Simple_example"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Simple example</span> </div> </a> <button aria-controls="toc-Simple_example-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Simple example subsection</span> </button> <ul id="toc-Simple_example-sublist" class="vector-toc-list"> <li id="toc-Within_LocalSettings.php" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Within_LocalSettings.php"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Within LocalSettings.php</span> </div> </a> <ul id="toc-Within_LocalSettings.php-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Longer_functions" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Longer_functions"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Longer functions</span> </div> </a> <ul id="toc-Longer_functions-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Parser_interface" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Parser_interface"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Parser interface</span> </div> </a> <button aria-controls="toc-Parser_interface-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Parser interface subsection</span> </button> <ul id="toc-Parser_interface-sublist" class="vector-toc-list"> <li id="toc-Controlling_the_parsing_of_output" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Controlling_the_parsing_of_output"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Controlling the parsing of output</span> </div> </a> <ul id="toc-Controlling_the_parsing_of_output-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Naming" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Naming"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Naming</span> </div> </a> <ul id="toc-Naming-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-The_setFunctionHook_hook" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#The_setFunctionHook_hook"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>The setFunctionHook hook</span> </div> </a> <ul id="toc-The_setFunctionHook_hook-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Expensive_parser_functions" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Expensive_parser_functions"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.4</span> <span>Expensive parser functions</span> </div> </a> <ul id="toc-Expensive_parser_functions-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Named_parameters" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Named_parameters"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Named parameters</span> </div> </a> <ul id="toc-Named_parameters-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> 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data-mw-deduplicate="TemplateStyles:r6387430">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li,.mw-parser-output .hlist .mw-empty-elt{display:none}.mw-parser-output .hlist dt:after{content:": "}.mw-parser-output .hlist dd:after,.mw-parser-output .hlist li:after{content:" · ";font-weight:bold}.mw-parser-output .hlist dd:last-child:after,.mw-parser-output .hlist dt:last-child:after,.mw-parser-output .hlist li:last-child:after{content:none}.mw-parser-output .hlist dd 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ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li:before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child:before,.mw-parser-output .hlist dt ol>li:first-child:before,.mw-parser-output .hlist li ol>li:first-child:before{content:" ("counter(listitem)"\a0 "}</style><div class="hlist"> <ul><li><a href="/wiki/Special:MyLanguage/Manual:Developing_extensions" title="Special:MyLanguage/Manual:Developing extensions">Development</a><span style="display:none"><a href="/wiki/Manual:Developing_extensions" title="Manual:Developing extensions"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Tag_extensions" title="Special:MyLanguage/Manual:Tag extensions">Tag extensions</a><span style="display:none"><a href="/wiki/Manual:Tag_extensions" title="Manual:Tag extensions"> </a></span></li> <li><b><a href="/wiki/Special:MyLanguage/Manual:Parser_functions" title="Special:MyLanguage/Manual:Parser functions">Parser functions</a></b><span style="display:none"><a class="mw-selflink selflink"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Hooks" title="Special:MyLanguage/Manual:Hooks">Hooks</a><span style="display:none"><a href="/wiki/Manual:Hooks" title="Manual:Hooks"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Special_pages" title="Special:MyLanguage/Manual:Special pages">Special pages</a><span style="display:none"><a href="/wiki/Manual:Special_pages" title="Manual:Special pages"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Skins" title="Special:MyLanguage/Manual:Skins">Skins</a><span style="display:none"><a href="/wiki/Manual:Skins" title="Manual:Skins"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Magic_words" title="Special:MyLanguage/Manual:Magic words">Magic words</a><span style="display:none"><a href="/wiki/Manual:Magic_words" title="Manual:Magic words"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/API:Extensions" title="Special:MyLanguage/API:Extensions">API</a><span style="display:none"><a href="/wiki/API:Extensions" title="API:Extensions"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Page_content_models" title="Special:MyLanguage/Manual:Page content models">Content models</a><span style="display:none"><a href="/wiki/Manual:Page_content_models" title="Manual:Page content models"> </a></span></li></ul> </div></div> </div> <figure class="mw-halign-right" typeof="mw:File"><a href="/wiki/File:MediaWiki-extensions-icon.svg" class="mw-file-description"><img alt="MediaWiki extensions" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/23/MediaWiki-extensions-icon.svg/125px-MediaWiki-extensions-icon.svg.png" decoding="async" width="125" height="84" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/23/MediaWiki-extensions-icon.svg/188px-MediaWiki-extensions-icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/23/MediaWiki-extensions-icon.svg/250px-MediaWiki-extensions-icon.svg.png 2x" data-file-width="686" data-file-height="463" /></a><figcaption></figcaption></figure> <p>Parser functions, added in MediaWiki 1.7, are a type of extension that integrate closely with the parser. The phrase "parser function" should not be confused with <a href="/wiki/Special:MyLanguage/Extension:ParserFunctions" title="Special:MyLanguage/Extension:ParserFunctions">Extension:ParserFunctions</a><span style="display:none"><a href="/wiki/Extension:ParserFunctions" title="Extension:ParserFunctions"> </a></span>, which is a collection of simple parser functions. (See <a href="/wiki/Special:MyLanguage/Help:Extension:ParserFunctions" title="Special:MyLanguage/Help:Extension:ParserFunctions">Help:Extension:ParserFunctions</a><span style="display:none"><a href="/wiki/Help:Extension:ParserFunctions" title="Help:Extension:ParserFunctions"> </a></span> for those.) </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Description">Description</h2></div> <p>Whereas a <a href="/wiki/Special:MyLanguage/Manual:Tag_extensions" title="Special:MyLanguage/Manual:Tag extensions">tag extension</a> is expected to take unprocessed text and return HTML to the browser, a parser function can 'interact' with other wiki elements in the page. For example, the output of a parser function could be used as a <a href="/wiki/Special:MyLanguage/Help:Templates#Parameters" title="Special:MyLanguage/Help:Templates">template parameter</a> or in the construction of a <a href="/wiki/Special:MyLanguage/Help:Link" title="Special:MyLanguage/Help:Link">link</a>. </p><p>The typical syntax for a parser function is: </p> <blockquote><p> {{ #functionname: param1 | param2 | param3 }} </p></blockquote> <p>For more information, see <span class="plainlinks"><a class="external text" href="https://doc.wikimedia.org/mediawiki-core/master/php/classParser.html#a501ce7bb8f461a1b5fbd9f05970cab67">the documentation</a></span> for <code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="nx">Parser</span><span class="o">::</span><span class="na">setFunctionHook</span> <span class="p">(</span> <span class="nv">$id</span><span class="p">,</span> <span class="nv">$callback</span><span class="p">,</span> <span class="nv">$flags</span> <span class="o">=</span> <span class="mi">0</span> <span class="p">)</span></code>. This documentation states: </p> <dl><dd>The callback function should have the form: <dl><dd><code>function myParserFunction( $parser, $arg1, $arg2, $arg3 ) { ... }</code></dd></dl></dd> <dd>Or with <code>SFH_OBJECT_ARGS</code>: <dl><dd><code>function myParserFunction( $parser, $frame, $args ) { ... }</code></dd></dl></dd></dl> <p>The first variant of the call passes all arguments as plain text. The second passes all arguments as an array of <a href="/wiki/Special:MyLanguage/Manual:PPNode.php" title="Special:MyLanguage/Manual:PPNode.php">PPNode</a><span style="display:none"><a href="/wiki/Manual:PPNode.php" title="Manual:PPNode.php"> </a></span>s, except for the first (<code>$args[0]</code>), which is currently text, though this may change in the future. These represent the unexpanded wikitext. The <code><a href="/wiki/Special:MyLanguage/Manual:PPFrame.php" title="Special:MyLanguage/Manual:PPFrame.php">$frame</a><span style="display:none"><a href="/wiki/Manual:PPFrame.php" title="Manual:PPFrame.php"> </a></span></code> parameter can be used to expand these arguments as needed. This is commonly used for conditional processing so that only the <code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code> case is evaluated with an <code>if-</code> or <code>switch-like</code> parser function. The frame object can also climb up the document tree to get information about the caller and has functions to determine and manage call depth, time-to-live, and whether the result of the parser function is volatile. </p><p>Creating a parser function is slightly more complicated than creating a new tag because the function name must be a <a href="/wiki/Special:MyLanguage/Help:Magic_words" title="Special:MyLanguage/Help:Magic words">magic word</a>, a keyword that supports aliases and localization. </p> <div class="mw-heading mw-heading2"><h2 id="Simple_example">Simple example</h2></div> <p>Below is an example of an extension that creates a parser function. </p><p>The registration goes into <b>extension.json</b> and the code into <b>src/ExampleExtensionHooks.php</b> respectively: </p> <table class="wikitable"> <tbody><tr> <th>Standard: </th> <th>Using the HookHandler interface: </th></tr> <tr> <td colspan="2"><b>extension.json</b> </td></tr> <tr> <td><div class="mw-highlight mw-highlight-lang-json mw-content-ltr" dir="ltr"><pre><span></span><span class="p">{</span> <span class="w"> </span><span class="nt">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ExampleExtension"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"author"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Me"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"version"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1.0.0"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"url"</span><span class="p">:</span><span class="w"> </span><span class="s2">"https://www.mediawiki.org/wiki/Extension:ExampleExtension"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"descriptionmsg"</span><span class="p">:</span><span class="w"> </span><span class="s2">"exampleextension-desc"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"license-name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"GPL-2.0-or-later"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"parserhook"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"MessagesDirs"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ExampleExtension"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span> <span class="w"> </span><span class="s2">"i18n"</span> <span class="w"> </span><span class="p">]</span> <span class="w"> </span><span class="p">},</span> <span class="w"> </span><span class="nt">"AutoloadClasses"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ExampleExtensionHooks"</span><span class="p">:</span><span class="w"> </span><span class="s2">"src/ExampleExtensionHooks.php"</span> <span class="w"> </span><span class="p">},</span> <span class="w"> </span><span class="nt">"ExtensionMessagesFiles"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ExampleExtensionMagic"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ExampleExtension.i18n.php"</span> <span class="w"> </span><span class="p">},</span> <span class="w"> </span><span class="nt">"Hooks"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ParserFirstCallInit"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ExampleExtensionHooks::onParserFirstCallInit"</span> <span class="w"> </span><span class="p">},</span> <span class="w"> </span><span class="nt">"manifest_version"</span><span class="p">:</span><span class="w"> </span><span class="mi">1</span> <span class="p">}</span> </pre></div> </td> <td> <div class="mw-highlight mw-highlight-lang-json mw-content-ltr" dir="ltr"><pre><span></span><span class="p">{</span> <span class="w"> </span><span class="nt">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ExampleExtension"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"author"</span><span class="p">:</span><span class="w"> </span><span class="s2">"Me"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"version"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1.0.0"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"url"</span><span class="p">:</span><span class="w"> </span><span class="s2">"https://www.mediawiki.org/wiki/Extension:ExampleExtension"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"descriptionmsg"</span><span class="p">:</span><span class="w"> </span><span class="s2">"exampleextension-desc"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"license-name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"GPL-2.0-or-later"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"parserhook"</span><span class="p">,</span> <span class="w"> </span><span class="nt">"MessagesDirs"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ExampleExtension"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span> <span class="w"> </span><span class="s2">"i18n"</span> <span class="w"> </span><span class="p">]</span> <span class="w"> </span><span class="p">},</span> <span class="w"> </span><span class="nt">"AutoloadClasses"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ExampleExtensionHooks"</span><span class="p">:</span><span class="w"> </span><span class="s2">"src/ExampleExtensionHooks.php"</span> <span class="w"> </span><span class="p">},</span> <span class="w"> </span><span class="nt">"ExtensionMessagesFiles"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ExampleExtensionMagic"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ExampleExtension.i18n.php"</span> <span class="w"> </span><span class="p">},</span> <span class="w"> </span><span class="nt">"Hooks"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ParserFirstCallInit"</span><span class="p">:</span><span class="w"> </span><span class="s2">"onParserFirstCallInit"</span> <span class="w"> </span><span class="p">},</span> <span class="w"> </span><span class="nt">"HookHandlers"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ExampleExtensionHooks"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"class"</span><span class="p">:</span><span class="w"> </span><span class="s2">"MediaWiki\\Extension\\ExampleExtension\\Hooks"</span> <span class="w"> </span><span class="p">}</span> <span class="w"> </span><span class="p">},</span> <span class="w"> </span><span class="nt">"manifest_version"</span><span class="p">:</span><span class="w"> </span><span class="mi">1</span> <span class="p">}</span> </pre></div> </td></tr> <tr> <td colspan="2"><b>ExampleExtensionHooks.php</b> </td></tr> <tr> <td><div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="cp"><?php</span> <span class="k">class</span> <span class="nc">ExampleExtensionHooks</span> <span class="p">{</span> <span class="c1">// Register any render callbacks with the parser</span> <span class="k">public</span> <span class="k">static</span> <span class="k">function</span> <span class="nf">onParserFirstCallInit</span><span class="p">(</span> <span class="nx">Parser</span> <span class="nv">$parser</span> <span class="p">)</span> <span class="p">{</span> <span class="c1">// Create a function hook associating the <code>example</code> magic word with renderExample()</span> <span class="nv">$parser</span><span class="o">-></span><span class="na">setFunctionHook</span><span class="p">(</span> <span class="s1">'example'</span><span class="p">,</span> <span class="p">[</span> <span class="nx">self</span><span class="o">::</span><span class="na">class</span><span class="p">,</span> <span class="s1">'renderExample'</span> <span class="p">]</span> <span class="p">);</span> <span class="p">}</span> <span class="c1">// Render the output of {{#example:}}.</span> <span class="k">public</span> <span class="k">static</span> <span class="k">function</span> <span class="nf">renderExample</span><span class="p">(</span> <span class="nx">Parser</span> <span class="nv">$parser</span><span class="p">,</span> <span class="nv">$param1</span> <span class="o">=</span> <span class="s1">''</span><span class="p">,</span> <span class="nv">$param2</span> <span class="o">=</span> <span class="s1">''</span><span class="p">,</span> <span class="nv">$param3</span> <span class="o">=</span> <span class="s1">''</span> <span class="p">)</span> <span class="p">{</span> <span class="c1">// The input parameters are wikitext with templates expanded.</span> <span class="c1">// The output should be wikitext too.</span> <span class="nv">$output</span> <span class="o">=</span> <span class="s2">"param1 is </span><span class="si">$param1</span><span class="s2"> and param2 is </span><span class="si">$param2</span><span class="s2"> and param3 is </span><span class="si">$param3</span><span class="s2">"</span><span class="p">;</span> <span class="k">return</span> <span class="nv">$output</span><span class="p">;</span> <span class="p">}</span> <span class="p">}</span> </pre></div> </td> <td><div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="cp"><?php</span> <span class="k">class</span> <span class="nc">ExampleExtensionHooks</span> <span class="k">implements</span> <span class="nx">ParserFirstCallInitHook</span> <span class="p">{</span> <span class="c1">// Register any render callbacks with the parser</span> <span class="k">public</span> <span class="k">function</span> <span class="nf">onParserFirstCallInit</span><span class="p">(</span> <span class="nv">$parser</span> <span class="p">)</span> <span class="p">{</span> <span class="c1">// Create a function hook associating the <code>example</code> magic word with renderExample()</span> <span class="nv">$parser</span><span class="o">-></span><span class="na">setFunctionHook</span><span class="p">(</span> <span class="s1">'example'</span><span class="p">,</span> <span class="p">[</span> <span class="nv">$this</span><span class="p">,</span> <span class="s1">'renderExample'</span> <span class="p">]</span> <span class="p">);</span> <span class="p">}</span> <span class="c1">// Render the output of {{#example:}}.</span> <span class="k">public</span> <span class="k">function</span> <span class="nf">renderExample</span><span class="p">(</span> <span class="nv">$parser</span><span class="p">,</span> <span class="nv">$param1</span> <span class="o">=</span> <span class="s1">''</span><span class="p">,</span> <span class="nv">$param2</span> <span class="o">=</span> <span class="s1">''</span><span class="p">,</span> <span class="nv">$param3</span> <span class="o">=</span> <span class="s1">''</span> <span class="p">)</span> <span class="p">{</span> <span class="c1">// The input parameters are wikitext with templates expanded.</span> <span class="c1">// The output should be wikitext too.</span> <span class="nv">$output</span> <span class="o">=</span> <span class="s2">"param1 is </span><span class="si">$param1</span><span class="s2"> and param2 is </span><span class="si">$param2</span><span class="s2"> and param3 is </span><span class="si">$param3</span><span class="s2">"</span><span class="p">;</span> <span class="k">return</span> <span class="nv">$output</span><span class="p">;</span> <span class="p">}</span> <span class="p">}</span> </pre></div> </td></tr></tbody></table> <p>Another file, <b>ExampleExtension.i18n.php</b>, in your extension directory (Not in the src/ subdirectory) should contain: </p> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="cp"><?php</span> <span class="sd">/**</span> <span class="sd"> * @license GPL-2.0-or-later</span> <span class="sd"> * @author Your Name (YourUserName)</span> <span class="sd"> */</span> <span class="nv">$magicWords</span> <span class="o">=</span> <span class="p">[];</span> <span class="sd">/** English</span> <span class="sd"> * @author Your Name (YourUserName)</span> <span class="sd"> */</span> <span class="nv">$magicWords</span><span class="p">[</span><span class="s1">'en'</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span> <span class="s1">'example'</span> <span class="o">=></span> <span class="p">[</span> <span class="mi">0</span><span class="p">,</span> <span class="s1">'example'</span> <span class="p">],</span> <span class="p">];</span> </pre></div> <p>With this extension enabled, </p> <ul><li>{{#example: hello | hi | hey}}</li></ul> <p>produces: </p> <ul><li>param1 is hello and param2 is hi and param3 is hey</li></ul> <style data-mw-deduplicate="TemplateStyles:r6651107">.mw-parser-output .note{background-position:left 7px top 50%;padding:0.5em 0.5em 0.5em 40px;margin:0.5em 0;overflow:hidden;background-color:#f8f9fa;color:#333;background-repeat:no-repeat;border:1px solid #ddd}.mw-parser-output .note-inline{display:inline-block;vertical-align:middle}.mw-parser-output .note-info{background-color:#eaf3ff;color:#333;background-image:url("https://upload.wikimedia.org/wikipedia/commons/e/ec/OOjs_UI_icon_information-progressive.svg");background-size:25px;border-color:#a3caff;padding-left:40px;min-height:25px}.mw-parser-output .note-reminder{background-color:#fff9ea;color:#333;background-image:url("https://upload.wikimedia.org/wikipedia/commons/a/a8/OOjs_UI_icon_lightbulb-yellow.svg");background-size:25px;border-color:#fc3;min-height:25px}.mw-parser-output .note-warn{background-color:#fff9ea;color:#333;background-image:url("https://upload.wikimedia.org/wikipedia/commons/3/3b/OOjs_UI_icon_alert-warning.svg");background-size:25px;border-color:#fc3;min-height:25px}.mw-parser-output .note-error{background-color:#fee7e6;color:#333;background-image:url("https://upload.wikimedia.org/wikipedia/commons/b/bf/OOjs_UI_icon_notice-destructive.svg");background-size:25px;border-color:#c33;min-height:25px}@media screen{html.skin-theme-clientpref-night .mw-parser-output .note{background-color:transparent;color:inherit}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .note{background-color:transparent;color:inherit}}</style><div role="note" class="note note-info">This magicWords array is not optional. If it is omitted, the parser function simply will not work; the {{#example: hello | hi}} will be rendered as though the extension were not installed. If only the language-specific array is initialized and not the magicWords array itself, this can cause localization errors as translations from other extensions leak into yours. You can associate magic words inline in PHP rather than through a i18n file. This is useful when defining hooks in <code>LocalSettings.php</code> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="nx">MediaWiki\MediaWikiServices</span><span class="o">::</span><span class="na">getInstance</span><span class="p">()</span><span class="o">-></span><span class="na">getContentLanguage</span><span class="p">()</span><span class="o">-></span><span class="na">mMagicExtensions</span><span class="p">[</span><span class="s1">'wikicodeToHtml'</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'MAG_CUSTOM'</span><span class="p">,</span> <span class="s1">'custom'</span><span class="p">];</span> </pre></div></div> <div class="mw-heading mw-heading3"><h3 id="Within_LocalSettings.php">Within LocalSettings.php</h3></div> <p>Magic words and their handling parser functions can be defined entirely in LocalSettings.php. </p> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="nv">$wgHooks</span><span class="p">[</span><span class="s1">'ParserFirstCallInit'</span><span class="p">][]</span> <span class="o">=</span> <span class="k">function</span> <span class="p">(</span> <span class="nx">Parser</span> <span class="nv">$parser</span> <span class="p">)</span> <span class="p">{</span> <span class="nx">MediaWiki\MediaWikiServices</span><span class="o">::</span><span class="na">getInstance</span><span class="p">()</span><span class="o">-></span><span class="na">getContentLanguage</span><span class="p">()</span><span class="o">-></span><span class="na">mMagicExtensions</span><span class="p">[</span><span class="s1">'wikicodeToHtml'</span><span class="p">]</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'wikicodeToHtml'</span><span class="p">,</span> <span class="s1">'wikicodeToHtml'</span><span class="p">];</span> <span class="nv">$parser</span><span class="o">-></span><span class="na">setFunctionHook</span><span class="p">(</span> <span class="s1">'wikicodeToHtml'</span><span class="p">,</span> <span class="s1">'wikicodeToHtml'</span> <span class="p">);</span> <span class="p">};</span> <span class="k">function</span> <span class="nf">wikicodeToHtml</span><span class="p">(</span> <span class="nx">Parser</span> <span class="nv">$parser</span><span class="p">,</span> <span class="nv">$code</span> <span class="o">=</span> <span class="s1">''</span> <span class="p">)</span> <span class="p">{</span> <span class="nv">$title</span> <span class="o">=</span> <span class="nv">$parser</span><span class="o">-></span><span class="na">getTitle</span><span class="p">();</span> <span class="nv">$options</span> <span class="o">=</span> <span class="nv">$parser</span><span class="o">-></span><span class="na">Options</span><span class="p">();</span> <span class="nv">$options</span><span class="o">-></span><span class="na">enableLimitReport</span><span class="p">(</span><span class="k">false</span><span class="p">);</span> <span class="nv">$parser</span> <span class="o">=</span> <span class="nv">$parser</span><span class="o">-></span><span class="na">getFreshParser</span><span class="p">();</span> <span class="k">return</span> <span class="p">[</span><span class="nv">$parser</span><span class="o">-></span><span class="na">parse</span><span class="p">(</span><span class="nv">$code</span><span class="p">,</span> <span class="nv">$title</span><span class="p">,</span> <span class="nv">$options</span><span class="p">)</span><span class="o">-></span><span class="na">getText</span><span class="p">(),</span> <span class="s1">'isHTML'</span> <span class="o">=></span> <span class="k">true</span><span class="p">];</span> <span class="p">}</span> </pre></div> <div class="mw-heading mw-heading3"><h3 id="Longer_functions">Longer functions</h3></div> <p>For longer functions, you may want to split the hook functions out to a _body.php or .hooks.php file and make them static functions of a class. Then you can load the class with <a href="/wiki/Special:MyLanguage/Manual:$wgAutoloadClasses" title="Special:MyLanguage/Manual:$wgAutoloadClasses">$wgAutoloadClasses</a><span style="display:none"><a href="/wiki/Manual:$wgAutoloadClasses" title="Manual:$wgAutoloadClasses"> </a></span> and call the static functions in the hooks; e.g.: </p><p>Put this in your <code>extension.json</code> file: </p> <div class="mw-highlight mw-highlight-lang-json mw-content-ltr" dir="ltr"><pre><span></span><span class="nt">"Hooks"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ParserFirstCallInit"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ExampleExtensionHooks::onParserFirstCallInit"</span> <span class="p">},</span> <span class="nt">"AutoloadClasses"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="nt">"ExampleExtensionHooks"</span><span class="p">:</span><span class="w"> </span><span class="s2">"src/ExampleExtensionHooks.php"</span> <span class="p">}</span> </pre></div> <ul><li><small>See: <a href="/wiki/Special:MyLanguage/Manual:Hooks#Writing_an_event_handler" title="Special:MyLanguage/Manual:Hooks">writing an event handler</a> for other styles.</small></li></ul> <p>Then put this in your <code>src/ExampleExtensionHooks.php</code> file: </p> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="k">class</span> <span class="nc">ExampleExtensionHooks</span> <span class="p">{</span> <span class="k">public</span> <span class="k">static</span> <span class="k">function</span> <span class="nf">onParserFirstCallInit</span><span class="p">(</span> <span class="nx">Parser</span> <span class="nv">$parser</span> <span class="p">)</span> <span class="p">{</span> <span class="nv">$parser</span><span class="o">-></span><span class="na">setFunctionHook</span><span class="p">(</span> <span class="s1">'example'</span><span class="p">,</span> <span class="p">[</span> <span class="nx">self</span><span class="o">::</span><span class="na">class</span><span class="p">,</span> <span class="s1">'renderExample'</span> <span class="p">]</span> <span class="p">);</span> <span class="p">}</span> <span class="p">}</span> </pre></div> <p><br /> </p> <div class="mw-heading mw-heading2"><h2 id="Parser_interface">Parser interface</h2></div> <div class="mw-heading mw-heading3"><h3 id="Controlling_the_parsing_of_output">Controlling the parsing of output</h3></div> <p>To have the wikitext returned by your parser function be fully parsed (including expansion of templates), set the <code>noparse</code> option to <code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">false</span></code> when returning: </p> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="k">return</span> <span class="p">[</span> <span class="nv">$output</span><span class="p">,</span> <span class="s1">'noparse'</span> <span class="o">=></span> <span class="k">false</span> <span class="p">];</span> </pre></div> <p>It seems the default value for <code>noparse</code> changed from <code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">false</span></code> to <code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code>, at least in some situations, sometime around version 1.12. </p><p>Conversely, to have your parser function return HTML that remains unparsed, rather than returning wikitext, use this: </p> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="k">return</span> <span class="p">[</span> <span class="nv">$output</span><span class="p">,</span> <span class="s1">'noparse'</span> <span class="o">=></span> <span class="k">true</span><span class="p">,</span> <span class="s1">'isHTML'</span> <span class="o">=></span> <span class="k">true</span> <span class="p">];</span> </pre></div> <div class="mw-heading mw-heading3"><h3 id="Naming">Naming</h3></div> <p>By default, MW adds a hash character (number sign, <code>#</code>) to the name of each parser function. To suppress that addition (and obtain a parser function with no <code>#</code> prefix), include the <i>SFH_NO_HASH</i> constant in the optional flags argument to setFunctionHook, as described <a href="#The_setFunctionHook_hook">below</a>. </p><p>When choosing a name without a hash prefix, note that transclusion of a page with a name starting with that function name followed by a colon is no longer possible. In particular, avoid function names equal to a namespace name. In the case that interwiki transclusion <a class="external autonumber" href="https://lists.wikimedia.org/hyperkitty/list/mediawiki-l@lists.wikimedia.org/thread/3M53FBQ66B4EZNU6XMJQRFG3TVCW7WQO/">[1]</a> is enabled, also avoid function names equal to an interwiki prefix. </p> <div class="mw-heading mw-heading3"><h3 id="The_setFunctionHook_hook">The setFunctionHook hook</h3></div> <p>For more details of the interface into the parser, see the documentation for setFunctionHook in includes/Parser.php. Here's a (possibly dated) copy of those comments: </p><p><b>function setFunctionHook( $id, $callback, $flags = 0 )</b> </p><p><b>Parameters:</b> </p> <ul><li>string $id - The magic word ID</li> <li>mixed $callback - The callback function (and object) to use</li> <li>integer $flags - Optional. Values:</li></ul> <dl><dd><ul><li><i>SFH_NO_HASH</i> (1) constant if you call the function without <code>#</code>.</li> <li><i>SFH_OBJECT_ARGS</i> (2) if you pass a PPFrame object and array of arguments instead of a series of function arguments, for which <a href="#Description">see above</a>.</li> <li>Defaults to 0 (no flags).</li></ul></dd></dl> <p><b>Return value:</b> The old callback function for this name, if any </p><p>Create a function, e.g., <code>{{#sum:1|2|3}}</code>. The callback function should have the form: </p> <div style="overflow:auto;" class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="k">function</span> <span class="nf">myParserFunction</span><span class="p">(</span> <span class="nv">$parser</span><span class="p">,</span> <span class="nv">$arg1</span><span class="p">,</span> <span class="nv">$arg2</span><span class="p">,</span> <span class="nv">$arg3</span> <span class="p">)</span> <span class="p">{</span> <span class="o">...</span> <span class="p">}</span> </pre></div> <p>The callback may either return the text result of the function, or an array with the text in element 0, and a number of flags in the other elements. The names of the flags are specified in the keys. Valid flags are: </p> <table class="wikitable"> <tbody><tr> <th>Name</th> <th>Type</th> <th>Default </th> <th>Description </th></tr> <tr> <td>found</td> <td>Boolean</td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code> </td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code> if the text returned is valid and processing of the template must stop. </td></tr> <tr> <td>text</td> <td>?</td> <td>? </td> <td>The text to return from the function. If isChildObj or isLocalObj are specified, this should be a DOM node instead. </td></tr> <tr> <td>noparse</td> <td>Boolean</td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code> </td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code> if text should not be preprocessed to a DOM tree, e.g. unsafe HTML tags should not be stripped, etc. </td></tr> <tr> <td>isHTML</td> <td>Boolean</td> <td>? </td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code> if the returned text is HTML and must be armoured against wikitext transformation. <a href="/wiki/Manual_talk:Parser_functions#isHTML_-_almost_but_not_entirely" title="Manual talk:Parser functions">But see discussion</a> </td></tr> <tr> <td>nowiki</td> <td>Boolean</td> <td>usually <code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">false</span></code> </td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code> if wiki markup in the return value (text) should be escaped. </td></tr> <tr> <td>isChildObj</td> <td>Boolean</td> <td>? </td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code> if the text is a DOM node needing expansion in a child frame. </td></tr> <tr> <td>isLocalObj</td> <td>Boolean</td> <td>? </td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code> if the text is a DOM node needing expansion in the current frame. The default value depends on other values and outcomes. </td></tr> <tr> <td>preprocessFlags</td> <td>?</td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">false</span></code> </td> <td>Optional <a href="/wiki/Special:MyLanguage/Manual:PPFrame.php" title="Special:MyLanguage/Manual:PPFrame.php">PPFrame</a><span style="display:none"><a href="/wiki/Manual:PPFrame.php" title="Manual:PPFrame.php"> </a></span> flags to use when parsing the returned text. This only applies when noparse is <code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">false</span></code>. </td></tr> <tr> <td>title</td> <td>?</td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">false</span></code> </td> <td>The <a href="/wiki/Special:MyLanguage/Manual:Title.php" title="Special:MyLanguage/Manual:Title.php">Title</a><span style="display:none"><a href="/wiki/Manual:Title.php" title="Manual:Title.php"> </a></span> object where the text came from. </td></tr> <tr> <td>forceRawInterwiki</td> <td>Boolean</td> <td>? </td> <td><code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">true</span></code> if interwiki transclusion must be forced to be done in raw mode and not rendered. </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="Expensive_parser_functions">Expensive parser functions</h3></div> <p>Some parser functions represent a significant use of a wiki's resources and should be marked as "expensive". The number of expensive parser functions on any given page is limited by the <a href="/wiki/Special:MyLanguage/Manual:$wgExpensiveParserFunctionLimit" title="Special:MyLanguage/Manual:$wgExpensiveParserFunctionLimit">$wgExpensiveParserFunctionLimit</a><span style="display:none"><a href="/wiki/Manual:$wgExpensiveParserFunctionLimit" title="Manual:$wgExpensiveParserFunctionLimit"> </a></span> setting. What counts as expensive is left up to the function itself, but typically, anything that is likely to cause a delay that extends beyond simple processing of data should be considered. This includes things like database reads and writes, launching a shell script synchronously, or file manipulation. On the other hand, not all such functions should necessarily be tagged. Semantic MediaWiki, for example, only marks a percentage of its database reads as expensive. This is due to the fact that on certain data-intensive pages, it could easily overflow the normal expensive parser function limits. In cases like this, the potential for noticeably slower performance that doesn't get flagged as expensive is a trade-off to having the functionality that SMW offers. </p><p>To mark your parser function as expensive, from within the body of the function's code, use <code class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><span class="nv">$result</span> <span class="o">=</span> <span class="nv">$parser</span><span class="o">-></span><span class="na">incrementExpensiveFunctionCount</span><span class="p">();</span></code>. The return value will be <code class="mw-highlight mw-highlight-lang-php mw-content-ltr" style="" dir="ltr"><span class="k">false</span></code> if the expensive function limit has been reached or exceeded. </p> <div class="mw-heading mw-heading2"><h2 id="Named_parameters">Named parameters</h2></div> <p>Parser functions do not support named parameters the way templates and tag extensions do, but it is occasionally useful to fake it. Users are often accustomed to using vertical bars ( <code>|</code> ) to separate arguments, so it's nice to be able to do that in the parser function context, too. Here's a simple example of how to accomplish this: </p> <div style="overflow:auto;" class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="k">function</span> <span class="nf">ExampleExtensionRenderParserFunction</span><span class="p">(</span> <span class="o">&</span><span class="nv">$parser</span> <span class="p">)</span> <span class="p">{</span> <span class="c1">// Suppose the user invoked the parser function like so:</span> <span class="c1">// {{#myparserfunction: foo=bar | apple=orange | banana }}</span> <span class="nv">$options</span> <span class="o">=</span> <span class="nx">extractOptions</span><span class="p">(</span> <span class="nb">array_slice</span><span class="p">(</span> <span class="nb">func_get_args</span><span class="p">(),</span> <span class="mi">1</span> <span class="p">)</span> <span class="p">);</span> <span class="c1">// Now you've got an array that looks like this:</span> <span class="c1">// [foo] => 'bar'</span> <span class="c1">// [apple] => 'orange'</span> <span class="c1">// [banana] => true</span> <span class="c1">// Continue writing your code...</span> <span class="p">}</span> <span class="sd">/**</span> <span class="sd"> * Converts an array of values in form [0] => "name=value"</span> <span class="sd"> * into a real associative array in form [name] => value</span> <span class="sd"> * If no = is provided, true is assumed like this: [name] => true</span> <span class="sd"> *</span> <span class="sd"> * @param array string $options</span> <span class="sd"> * @return array $results</span> <span class="sd"> */</span> <span class="k">function</span> <span class="nf">extractOptions</span><span class="p">(</span> <span class="k">array</span> <span class="nv">$options</span> <span class="p">)</span> <span class="p">{</span> <span class="nv">$results</span> <span class="o">=</span> <span class="p">[];</span> <span class="k">foreach</span> <span class="p">(</span> <span class="nv">$options</span> <span class="k">as</span> <span class="nv">$option</span> <span class="p">)</span> <span class="p">{</span> <span class="nv">$pair</span> <span class="o">=</span> <span class="nb">array_map</span><span class="p">(</span> <span class="s1">'trim'</span><span class="p">,</span> <span class="nb">explode</span><span class="p">(</span> <span class="s1">'='</span><span class="p">,</span> <span class="nv">$option</span><span class="p">,</span> <span class="mi">2</span> <span class="p">)</span> <span class="p">);</span> <span class="k">if</span> <span class="p">(</span> <span class="nb">count</span><span class="p">(</span> <span class="nv">$pair</span> <span class="p">)</span> <span class="o">===</span> <span class="mi">2</span> <span class="p">)</span> <span class="p">{</span> <span class="nv">$results</span><span class="p">[</span> <span class="nv">$pair</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="p">]</span> <span class="o">=</span> <span class="nv">$pair</span><span class="p">[</span><span class="mi">1</span><span class="p">];</span> <span class="p">}</span> <span class="k">if</span> <span class="p">(</span> <span class="nb">count</span><span class="p">(</span> <span class="nv">$pair</span> <span class="p">)</span> <span class="o">===</span> <span class="mi">1</span> <span class="p">)</span> <span class="p">{</span> <span class="nv">$results</span><span class="p">[</span> <span class="nv">$pair</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="p">]</span> <span class="o">=</span> <span class="k">true</span><span class="p">;</span> <span class="p">}</span> <span class="p">}</span> <span class="k">return</span> <span class="nv">$results</span><span class="p">;</span> <span class="p">}</span> </pre></div> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div> <p>General and related guides: </p> <ul><li><a href="/wiki/Special:MyLanguage/Manual:Developing_extensions" title="Special:MyLanguage/Manual:Developing extensions">Manual:Developing extensions</a><span style="display:none"><a href="/wiki/Manual:Developing_extensions" title="Manual:Developing extensions"> </a></span>, or for more general information about extensions, see <a href="/wiki/Special:MyLanguage/Manual:Extensions" title="Special:MyLanguage/Manual:Extensions">Manual:Extensions</a><span style="display:none"><a href="/wiki/Manual:Extensions" title="Manual:Extensions"> </a></span> and <a href="/wiki/Special:MyLanguage/Extensions_FAQ" title="Special:MyLanguage/Extensions FAQ">Extensions FAQ</a><span style="display:none"><a href="/wiki/Extensions_FAQ" title="Extensions FAQ"> </a></span>.</li> <li><a href="/wiki/Special:MyLanguage/Manual:Tag_extensions" title="Special:MyLanguage/Manual:Tag extensions">Manual:Tag extensions</a><span style="display:none"><a href="/wiki/Manual:Tag_extensions" title="Manual:Tag extensions"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Magic_words" title="Special:MyLanguage/Manual:Magic words">Manual:Magic words</a><span style="display:none"><a href="/wiki/Manual:Magic_words" title="Manual:Magic words"> </a></span></li></ul> <p>Code: </p> <ul><li><a href="/wiki/Special:MyLanguage/Manual:Parser.php" title="Special:MyLanguage/Manual:Parser.php">Manual:Parser.php</a><span style="display:none"><a href="/wiki/Manual:Parser.php" title="Manual:Parser.php"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Hooks/ParserFirstCallInit" title="Special:MyLanguage/Manual:Hooks/ParserFirstCallInit">Manual:Hooks/ParserFirstCallInit</a><span style="display:none"><a href="/wiki/Manual:Hooks/ParserFirstCallInit" title="Manual:Hooks/ParserFirstCallInit"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Parser_function_hooks" title="Special:MyLanguage/Parser function hooks">Parser function hooks</a><span style="display:none"><a href="/wiki/Parser_function_hooks" title="Parser function hooks"> </a></span> - an (incomplete) list of parser functions provided by core and extensions</li> <li>The <a rel="nofollow" class="external text" href="https://github.com/JeroenDeDauw/ParserHooks#parserhooks">Parser Hooks</a> PHP library, which provides an object orientated interface for declarative parser hooks</li> <li><a href="/wiki/Special:MyLanguage/Manual:Extension_data" title="Special:MyLanguage/Manual:Extension data">Manual:Extension data</a><span style="display:none"><a href="/wiki/Manual:Extension_data" title="Manual:Extension data"> </a></span></li></ul> <p>Examples: </p> <ul><li>The <a href="/wiki/Special:MyLanguage/Extension:ParserFunctions" title="Special:MyLanguage/Extension:ParserFunctions">ParserFunctions extension</a> is a well-known collection of parser functions.</li> <li><a href="/wiki/Special:MyLanguage/Help:Extension:ParserFunctions" title="Special:MyLanguage/Help:Extension:ParserFunctions">Help:Extension:ParserFunctions</a><span style="display:none"><a href="/wiki/Help:Extension:ParserFunctions" title="Help:Extension:ParserFunctions"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/:Category:Parser_function_extensions" title="Special:MyLanguage/:Category:Parser function extensions">Category:Parser function extensions</a><span style="display:none">[[::Category:Parser function extensions| ]]</span></li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://www.mediawiki.org/w/index.php?title=Manual:Parser_functions&oldid=6846788">https://www.mediawiki.org/w/index.php?title=Manual:Parser_functions&oldid=6846788</a>"</div></div> <div id="catlinks" class="catlinks" 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