Fix crash when first argument to strtr is empty

26 years ago · 16987ca15f
1 changed files with 5 additions and 0 deletions
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@ -1573,6 +1573,11 @@ PHP_FUNCTION(strtr)

 	convert_to_string_ex(str);

+	/* shortcut for empty string */
+	if(Z_STRLEN_PP(str) == 0) {
+		RETURN_EMPTY_STRING();
+	}
+
 	if (ac == 2) {
 		php_strtr_array(return_value,(*str)->value.str.val,(*str)->value.str.len,HASH_OF(*from));
 	} else {