Ticket #6297: 6297.diff

wp-includes/formatting.php

@@ -1169 +1169 @@
  * @return string Balanced text
  */
 function balanceTags( $text, $force = false ) {
-        if ( $force || get_option('use_balanceTags') == 1 )
-                return force_balance_tags( $text );
-        else
-                return $text;
+        if ( $force || get_option('use_balanceTags') == 1 ) {
+                $quicktags = apply_filters( 'balancetags_quicktags', array( 'more.*?', 'nextpage' ) ); 
+                // Outer capture lets PREG_SPLIT_DELIM_CAPTURE return the quicktags
+                // Inner noncapturing group matches any of the defined quicktags
+                $quicktag_regex = '/(<!--(?:' . implode( '|', $quicktags ) . ')-->)/';
+                $parts = preg_split( $quicktag_regex, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
+                return implode( '', array_map( 'force_balance_tags', $parts ) );
+        }
+
+        return $text;
 }
 
 /**