std: add test for unserialize_callback_func INI setting

Author: Girgias

ext/standard/tests/serialize/unserialize_callback_func_INI_modifications.phpt

@@ -0,0 +1,29 @@
+--TEST--
+unserialize_callback_func INI setting set multiple times during runtime
+--FILE--
+<?php
+
+function unserialize_cb_original($name)
+{
+    ini_set('unserialize_callback_func', 'unserialize_cb_changed');
+}
+
+function unserialize_cb_changed($name)
+{
+}
+
+ini_set('unserialize_callback_func', 'unserialize_cb_original');
+
+unserialize('O:3:"FOO":0:{}');
+
+var_dump(ini_get('unserialize_callback_func'));
+
+ini_restore('unserialize_callback_func');
+
+var_dump(ini_get('unserialize_callback_func'));
+
+?>
+--EXPECTF--
+Warning: unserialize(): Function unserialize_cb_original() hasn't defined the class it was called for in %s on line %d
+string(22) "unserialize_cb_changed"
+string(0) ""