From 3cc6bd10acdec14dc28bce1f39689bc99add4514 Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikic@php.net>
Date: Wed, 2 Jul 2014 22:31:52 +0200
Subject: [PATCH] Fix bug #67151: strtr with empty array crashes

---
 NEWS                  | 1 +
 ext/standard/string.c | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/NEWS b/NEWS
index ccc90277ba1..44196a3e1a6 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,7 @@ PHP                                                                        NEWS
     match). (Bob)
   . Fixed bug #67091 (make install fails to install libphp5.so on FreeBSD 10.0).
     (Ferenc)
+  . Fixed bug #67151 (strtr with empty array crashes). (Nikita)
 
 - CLI server:
   . Implemented FR #67429 (CLI server is missing some new HTTP response codes).
diff --git a/ext/standard/string.c b/ext/standard/string.c
index c4e77f2f299..22b1957f1e0 100644
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -3155,6 +3155,10 @@ static void php_strtr_array(zval *return_value, char *str, int slen, HashTable *
 	int			patterns_len;
 	zend_llist	*allocs;
 
+	if (zend_hash_num_elements(pats) == 0) {
+		RETURN_STRINGL(str, slen, 1);
+	}
+
 	S(&text) = str;
 	L(&text) = slen;