diff -up php-5.2.17/ext/standard/var.c.bug-55082 php-5.2.17/ext/standard/var.c
--- php-5.2.17/ext/standard/var.c.bug-55082	2010-09-14 03:14:18.000000000 +0700
+++ php-5.2.17/ext/standard/var.c	2011-08-28 15:18:52.000000000 +0700
@@ -401,7 +401,7 @@ static int php_object_element_export(zva
 {
 	int level;
 	smart_str *buf;
-	char *prop_name, *class_name;
+	
 	TSRMLS_FETCH();
 
 	level = va_arg(args, int);
@@ -409,11 +409,20 @@ static int php_object_element_export(zva
 
 	buffer_append_spaces(buf, level + 2);
 	if (hash_key->nKeyLength != 0) {
-		zend_unmangle_property_name(hash_key->arKey, hash_key->nKeyLength - 1, &class_name, &prop_name);
+                char *class_name, /* ignored, but must be passed to unmangle */
+                        *pname,
+                        *pname_esc;
+                int  pname_esc_len;
+
+                zend_unmangle_property_name(hash_key->arKey, hash_key->nKeyLength - 1,
+                            &class_name, &pname);
+                pname_esc = php_addcslashes(pname, strlen(pname), &pname_esc_len, 0,
+                        "'\\", 2 TSRMLS_CC);
 
 		smart_str_appendc(buf, '\'');
-		smart_str_appends(buf, prop_name);
+		smart_str_appendl(buf, pname_esc, pname_esc_len);
 		smart_str_appendc(buf, '\'');
+		efree(pname_esc);
 	} else {
 		smart_str_append_long(buf, hash_key->h);
 	}