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for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Development guidelines</span></h1> <div class="mw-indicators"> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Development_guidelines" title="View the content page [c]" accesskey="c"><span>Page</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Talk:Development_guidelines&action=edit&redlink=1" rel="discussion" class="new" title="Discussion about the content page (page does not exist) [t]" accesskey="t"><span>Discussion</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul 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href="/wiki/Development_guidelines/gl" class="mw-pt-progress mw-pt-progress--med" title="Desenvolvemento directiva (17% translated)" lang="gl" dir="ltr">galego</a></li> <li><a href="/wiki/Development_guidelines/pt-br" class="mw-pt-progress mw-pt-progress--complete" title="Diretrizes de desenvolvimento (100% translated)" lang="pt-BR" dir="ltr">português do Brasil</a></li> <li><a href="/wiki/Development_guidelines/cs" class="mw-pt-progress mw-pt-progress--complete" title="Zásady rozvoje (100% translated)" lang="cs" dir="ltr">čeština</a></li> <li><a href="/wiki/Development_guidelines/be-tarask" class="mw-pt-progress mw-pt-progress--complete" title="Рэкамэндацыі для распрацоўкі (100% translated)" lang="be-tarask" dir="ltr">беларуская (тарашкевіца)</a></li> <li><a href="/wiki/Development_guidelines/ar" class="mw-pt-progress mw-pt-progress--complete" title="إرشادات التطوير (100% translated)" lang="ar" dir="rtl">العربية</a></li> <li><a href="/wiki/Development_guidelines/zh" class="mw-pt-progress mw-pt-progress--complete" title="开发指引 (100% translated)" lang="zh" dir="ltr">中文</a></li> <li><a href="/wiki/Development_guidelines/ja" class="mw-pt-progress mw-pt-progress--complete" title="開発の指針 (100% translated)" lang="ja" dir="ltr">日本語</a></li> <li><a href="/wiki/Development_guidelines/nan" class="mw-pt-progress mw-pt-progress--med" title="== Huat-tián tsí-lâm == (17% translated)" lang="nan" dir="ltr">閩南語 / Bân-lâm-gú</a></li></ul></div> <p>The <a href="/wiki/Special:MyLanguage/MediaWiki" title="Special:MyLanguage/MediaWiki">MediaWiki</a> software is developed collaboratively by people from all around the world. 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class="plainlinks hlist navbar mini"><ul><li class="nv-view"><a href="/wiki/Template:Development_guidelines_navigation" title="Template:Development guidelines navigation"><abbr title="View this template" style=";;background:none transparent;border:none;box-shadow:none; padding:0;">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Development_guidelines_navigation" title="Template talk:Development guidelines navigation"><abbr title="Discuss this template" style=";;background:none transparent;border:none;box-shadow:none; padding:0;">t</abbr></a></li><li class="nv-edit"><a class="external text" href="https://www.mediawiki.org/w/index.php?title=Template:Development_guidelines_navigation&action=edit"><abbr title="Edit this template" style=";;background:none transparent;border:none;box-shadow:none; padding:0;">e</abbr></a></li></ul></div><div id="Development_guidelines" style="font-size:114%;margin:0 4em"><b><a href="/wiki/Special:MyLanguage/Development_guidelines" title="Special:MyLanguage/Development guidelines"><span style="font-weight: bold;">Development guidelines</span></a></b><span style="display:none"><a class="mw-selflink selflink"> </a></span></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Policies</th><td class="navbox-list1 navbox-list navbox-odd" style="width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/Special:MyLanguage/Development_policy" title="Special:MyLanguage/Development policy">Development policy</a><span style="display:none"><a href="/wiki/Development_policy" title="Development policy"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Wikimedia_Engineering_Architecture_Principles" title="Special:MyLanguage/Wikimedia Engineering Architecture Principles">Architecture principles</a><span style="display:none"><a href="/wiki/Wikimedia_Engineering_Architecture_Principles" title="Wikimedia Engineering Architecture Principles"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Wikimedia_services_policy" title="Special:MyLanguage/Wikimedia services policy">Services policy</a><span style="display:none"><a href="/wiki/Wikimedia_services_policy" title="Wikimedia services policy"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Support_policy_for_PHP" title="Special:MyLanguage/Support policy for PHP">Support policy for PHP</a><span style="display:none"><a href="/wiki/Support_policy_for_PHP" title="Support policy for PHP"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Gerrit/Privilege_policy" title="Special:MyLanguage/Gerrit/Privilege policy">Gerrit/Privilege policy</a><span style="display:none"><a href="/wiki/Gerrit/Privilege_policy" title="Gerrit/Privilege policy"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Stable_interface_policy" title="Special:MyLanguage/Stable interface policy">Stable interface policy</a><span style="display:none"><a href="/wiki/Stable_interface_policy" title="Stable interface policy"> </a></span> <ul><li><a href="/wiki/Special:MyLanguage/Stable_interface_policy/Frontend" title="Special:MyLanguage/Stable interface policy/Frontend">Frontend</a><span style="display:none"><a href="/wiki/Stable_interface_policy/Frontend" title="Stable interface policy/Frontend"> </a></span></li></ul></li> <li><a href="/wiki/Special:MyLanguage/MediaWiki_database_policy" title="Special:MyLanguage/MediaWiki database policy">MediaWiki database policy</a><span style="display:none"><a href="/wiki/MediaWiki_database_policy" title="MediaWiki database policy"> </a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">General guidelines</th><td class="navbox-list1 navbox-list navbox-even" style="width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/Special:MyLanguage/Security_for_developers" title="Special:MyLanguage/Security for developers">Security for developers</a><span style="display:none"><a href="/wiki/Security_for_developers" title="Security for developers"> </a></span></li> <li><a href="https://wikitech.wikimedia.org/wiki/Performance/Guides/Backend_performance_practices" class="extiw" title="wikitech:Performance/Guides/Backend performance practices">Performance guidelines</a></li> <li><a href="/wiki/Special:MyLanguage/Gerrit/Commit_message_guidelines" title="Special:MyLanguage/Gerrit/Commit message guidelines">Commit message guidelines</a><span style="display:none"><a href="/wiki/Gerrit/Commit_message_guidelines" title="Gerrit/Commit message guidelines"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Security_checklist_for_developers" title="Special:MyLanguage/Security checklist for developers">Security checklist for developers</a><span style="display:none"><a href="/wiki/Security_checklist_for_developers" title="Security checklist for developers"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Localisation" title="Special:MyLanguage/Localisation">Localisation</a><span style="display:none"><a href="/wiki/Localisation" title="Localisation"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Design/Living_style_guide" title="Special:MyLanguage/Design/Living style guide">Design style guide</a><span style="display:none"><a href="/wiki/Design/Living_style_guide" title="Design/Living style guide"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Documentation/Style_guide" title="Special:MyLanguage/Documentation/Style guide">Documentation/Style guide</a><span style="display:none"><a href="/wiki/Documentation/Style_guide" title="Documentation/Style guide"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Accessibility_guide_for_developers" title="Special:MyLanguage/Accessibility guide for developers">Accessibility guide for developers</a><span style="display:none"><a href="/wiki/Accessibility_guide_for_developers" title="Accessibility guide for developers"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Inclusive_language" title="Special:MyLanguage/Inclusive language">Inclusive language</a><span style="display:none"><a href="/wiki/Inclusive_language" title="Inclusive language"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Guidelines_for_a_healthy_code_review_culture" title="Special:MyLanguage/Guidelines for a healthy code review culture">Guidelines for a healthy code review culture</a><span style="display:none"><a href="/wiki/Guidelines_for_a_healthy_code_review_culture" title="Guidelines for a healthy code review culture"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Collaborative_programming" title="Special:MyLanguage/Collaborative programming">Collaborative programming</a><span style="display:none"><a href="/wiki/Collaborative_programming" title="Collaborative programming"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Best_practices_for_extensions" title="Special:MyLanguage/Best practices for extensions">Best practices for extensions</a><span style="display:none"><a href="/wiki/Best_practices_for_extensions" title="Best practices for extensions"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Pre-commit_checklist" title="Special:MyLanguage/Manual:Pre-commit checklist">Pre-commit checklist</a><span style="display:none"><a href="/wiki/Manual:Pre-commit_checklist" title="Manual:Pre-commit checklist"> </a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Code conventions</th><td class="navbox-list1 navbox-list navbox-odd" style="width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions#Code_structure" title="Special:MyLanguage/Manual:Coding conventions">All languages</a><span style="display:none"><a href="/wiki/Manual:Coding_conventions#Code_structure" title="Manual:Coding conventions"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions/PHP" title="Special:MyLanguage/Manual:Coding conventions/PHP">PHP</a><span style="display:none"><a href="/wiki/Manual:Coding_conventions/PHP" title="Manual:Coding conventions/PHP"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:PHP_unit_testing/Writing_unit_tests#Test_conventions" title="Special:MyLanguage/Manual:PHP unit testing/Writing unit tests">PHPUnit</a><span style="display:none"><a href="/wiki/Manual:PHP_unit_testing/Writing_unit_tests#Test_conventions" title="Manual:PHP unit testing/Writing unit tests"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions/JavaScript" title="Special:MyLanguage/Manual:Coding conventions/JavaScript">JavaScript</a><span style="display:none"><a href="/wiki/Manual:Coding_conventions/JavaScript" title="Manual:Coding conventions/JavaScript"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions/CSS" title="Special:MyLanguage/Manual:Coding conventions/CSS">CSS</a><span style="display:none"><a href="/wiki/Manual:Coding_conventions/CSS" title="Manual:Coding conventions/CSS"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions/Selenium" title="Special:MyLanguage/Manual:Coding conventions/Selenium">Selenium</a><span style="display:none"><a href="/wiki/Manual:Coding_conventions/Selenium" title="Manual:Coding conventions/Selenium"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions/Lua" title="Special:MyLanguage/Manual:Coding conventions/Lua">Lua</a><span style="display:none"><a href="/wiki/Manual:Coding_conventions/Lua" title="Manual:Coding conventions/Lua"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions/Python" title="Special:MyLanguage/Manual:Coding conventions/Python">Python</a><span style="display:none"><a href="/wiki/Manual:Coding_conventions/Python" title="Manual:Coding conventions/Python"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions/Java" title="Special:MyLanguage/Manual:Coding conventions/Java">Java</a><span style="display:none"><a href="/wiki/Manual:Coding_conventions/Java" title="Manual:Coding conventions/Java"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions/SVG" title="Special:MyLanguage/Manual:Coding conventions/SVG">SVG</a><span style="display:none"><a href="/wiki/Manual:Coding_conventions/SVG" title="Manual:Coding conventions/SVG"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions/Vue" title="Special:MyLanguage/Manual:Coding conventions/Vue">Vue</a><span style="display:none"><a href="/wiki/Manual:Coding_conventions/Vue" title="Manual:Coding conventions/Vue"> </a></span></li> <li><a href="/wiki/Special:MyLanguage/Manual:Coding_conventions/Database" title="Special:MyLanguage/Manual:Coding conventions/Database">Database schemas</a><span style="display:none"><a 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