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<title>[17621] trunk/wp-includes/compat.php: Add mb_substr() back to compat.php (
it is non-default).</title>
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<body>
<div id="msg">
<dl>
<dt>Revision</dt> <dd><a href="http://trac.wordpress.org/changeset/17621">17621</a></dd>
<dt>Author</dt> <dd>markjaquith</dd>
<dt>Date</dt> <dd>2011-04-07 15:46:57 +0000 (Thu, 07 Apr 2011)</dd>
</dl>
<h3>Log Message</h3>
<pre>Add mb_substr() back to compat.php (it is non-default). see <a href="http://trac.wordpress.org/ticket/16918">#16918</a>. props joostdevalk</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkwpincludescompatphp">trunk/wp-includes/compat.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunkwpincludescompatphp"></a>
<div class="modfile"><h4>Modified: trunk/wp-includes/compat.php (17620 => 17621)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/wp-includes/compat.php 2011-04-07 15:46:48 UTC (rev 17620)
+++ trunk/wp-includes/compat.php 2011-04-07 15:46:57 UTC (rev 17621)
</span><span class="lines">@@ -12,3 +12,22 @@
</span><span class="cx"> return $string;
</span><span class="cx"> }
</span><span class="cx"> }
</span><ins>+
+if ( !function_exists('mb_substr') ):
+ function mb_substr( $str, $start, $length=null, $encoding=null ) {
+ return _mb_substr($str, $start, $length, $encoding);
+ }
+endif;
+
+function _mb_substr( $str, $start, $length=null, $encoding=null ) {
+ // the solution below, works only for utf-8, so in case of a different
+ // charset, just use built-in substr
+ $charset = get_option( 'blog_charset' );
+ if ( !in_array( $charset, array('utf8', 'utf-8', 'UTF8', 'UTF-8') ) ) {
+ return is_null( $length )? substr( $str, $start ) : substr( $str, $start, $length);
+ }
+ // use the regex unicode support to separate the UTF-8 characters into an array
+ preg_match_all( '/./us', $str, $match );
+ $chars = is_null( $length )? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
+ return implode( '', $chars );
+}
</ins></span></pre>
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