View source for Manual:$wgLegalTitleChars

<languages/>
{{SettingSummary
|name        = LegalTitleChars
|summary     = <translate><!--T:1--> Override the default list of illegal characters in page titles.</translate>
|section     = Page titles and redirects
|version_min = 1.6.0
|rev_introduced = 10960
|version_deprecated = 1.41.0
|change_deprecated  = 942710
|sha_deprecated     = 1552f42016788b3023c5f7369b26578af1ed2156
|range       = (<translate><!--T:2--> string</translate>)
|default     = <syntaxhighlight lang="php" inline>' %!"$&\'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z~\\x80-\\xFF+'</syntaxhighlight> (1.39+)<br/>
<syntaxhighlight lang="php" inline>" %!\"$&'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z~\\x80-\\xFF+"</syntaxhighlight> (1.8-1.38)<br/>
<syntaxhighlight lang="php" inline>" %!\"$&'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z~\\x80-\\xFF"</syntaxhighlight> (1.6-1.7)
}}
<translate>
== Details == <!--T:4-->
</translate>
{{warning|1=<translate><!--T:5--> Don't change this unless you know what you're doing!</translate>}}

<translate>
<!--T:6-->
This is a regex character class (i.e. a list of characters in a format suitable for a regular expression) that you want MediaWiki to allow in [[<tvar|meta>m:Special:MyLanguage/Help:Page_name</>|page titles]] despite being in the list of illegal characters.

<!--T:7-->
The list of illegal characters is as follows: <tvar|1><code><nowiki>#<>[]|{}</nowiki></code></>, non-printable characters 0 through 31, and 'delete' character 127.

== Problem characters == <!--T:8-->

<!--T:9-->
The following punctuation symbols may cause problems if enabled:
</translate>

*  '''<code><nowiki>[]{}|#</nowiki></code>''' - <translate><!--T:10--> These are needed for link and template syntax, never enable them.</translate>
*  '''<code><nowiki><></nowiki></code>''' - <translate><!--T:11--> These cause problems with HTML escaping, don't use.</translate>
*  '''<code>%</code>''' - <translate><!--T:12--> Minor problems with path to query rewrite rules, see below. Included in the default allow list.</translate>
*  '''<code>+</code>''' - <translate><!--T:13--> Doesn't work with path to query rewrite rules, corrupted by apache.</translate> <translate><!--T:14--> Included in the default allow list since MediaWiki 1.8.0.</translate> <translate><!--T:15--> In some rare cases you may wish to remove + for compatibility with old links.</translate>
*  '''<code>?</code>''' - <translate><!--T:16--> Doesn't work with path to PATH_INFO rewrites. Included in the default allow list.</translate>

<translate>
<!--T:17-->
The last three of these punctuation problems can be avoided by using an alias, instead of a rewrite rule of either variety.
</translate>

<translate><!--T:18--> The problem with % is that when using a path to query rewrite rule, URLs are double-unescaped: once by Apache's path conversion code, and again by PHP.</translate>
<translate><!--T:19--> So %253F, for example, becomes "?".</translate>
<translate><!--T:20--> Our code does not double-escape to compensate for this, indeed double escaping would break if the double-escaped title was passed in the query string rather than the path.</translate>
<translate><!--T:21--> This is a minor security issue because articles can be created such that they are hard to view or edit.</translate>

<translate>
<!--T:22-->
Theoretically 0x80-0x9F of ISO 8859-1 should be disallowed, but this breaks interlanguage links and so they are included in the allowed list by default.

==References== <!--T:23-->
</translate>
* [[rev:10960|revision 10960]] (2015-09-09)

<translate>
== See also == <!--T:24-->
</translate>
* {{ll|Help:Bad title}}
* {{ll|Manual:Title.php|Title.php}}
* {{ll|Manual:CleanupTitles.php|CleanupTitles.php}}
* {{ll|Manual:$wgIllegalFileChars|$wgIllegalFileChars}}
* {{ll|Manual:$wgInvalidUsernameCharacters|$wgInvalidUsernameCharacters}}