Merge branch 'PHP-5.3' into PHP-5.4

Author: laruence

Zend/tests/bug62680.phpt

@@ -0,0 +1,13 @@
+--TEST--
+Bug #62680 (Function isset() throws fatal error on set array if non-existent key depth >= 3)
+--XFAIL--
+see https://bugs.php.net/62680
+--FILE--
+<?php
+$array = array("");
+var_dump(isset($array[0]["a"]["b"]));
+var_dump(isset($array[0]["a"]["b"]["c"]));
+?>
+--EXPECT--
+bool(false)
+bool(false)