fix typo and invalid read

diff --git a/ext/standard/string.c b/ext/standard/string.c
index 065079763656256f4782ae1596e61b32d302df62..ce3d6604201e9627316c9324095a9703c23ecbd8 100644 (file)
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -2688,7 +2688,7 @@ PHP_FUNCTION(stripos)
                                u_needle_char[needle_len++] = U16_TRAIL(ch);
                                u_needle_char[needle_len]   = 0;
                        }
-                       haystack_dup = php_u_strtolower(haystack_dup, &haystack_len, UG(default_locale));
+                       haystack_dup = php_u_strtolower(Z_USTRVAL_P(haystack), &haystack_len, UG(default_locale));
                        found = zend_u_memnstr((UChar *)haystack_dup + offset,
                                                                   (UChar *)u_needle_char, needle_len,
                                                                   (UChar *)haystack_dup + haystack_len);