Changeset 17621

Timestamp:

04/07/2011 03:46:57 PM (14 years ago)

Author:

markjaquith

Message:

Add mb_substr() back to compat.php (it is non-default). see #16918. props joostdevalk

File:

• trunk/wp-includes/compat.php (modified) (1 diff)

trunk/wp-includes/compat.php

@@ -13 +13 @@
     }
 }
+
+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 );
+}