MFH

ext/pcre/php_pcre.c

@@ -1220,8 +1220,11 @@ static char *php_replace_in_subject(zval *regex, zval *replace, zval **subject,
 				efree(subject_value);
 				subject_value = result;
 				subject_len = *result_len;
+			} else {
+				efree(subject_value);
+				return NULL;
 			}
-			
+
 			zend_hash_move_forward(Z_ARRVAL_P(regex));
 		}
 

ext/pcre/tests/006.phpt

@@ -0,0 +1,22 @@
+--TEST--
+preg_replace() with array of failing regular expressions
+--FILE--
+<?php
+
+$text = '[CODE]&lt;td align=&quot;$stylevar[right]&quot;&gt;[/CODE]';
+$result = preg_replace(array('#\[(right)\](((?R)|[^[]+?|\[)*)\[/\\1\]#siU', '#\[(right)\](((?R)|[^[]+?|\[)*)\[/\\1\]#siU'), '', $text);
+var_dump($text);
+var_dump($result);
+
+$result = preg_replace('#\[(right)\](((?R)|[^[]+?|\[)*)\[/\\1\]#siU', '', $text);
+var_dump($text);
+var_dump($result);
+
+echo "Done\n";
+?>
+--EXPECTF--	
+string(58) "[CODE]&lt;td align=&quot;$stylevar[right]&quot;&gt;[/CODE]"
+NULL
+string(58) "[CODE]&lt;td align=&quot;$stylevar[right]&quot;&gt;[/CODE]"
+NULL
+Done