don't sort array with single element

diff --git a/ext/standard/array.c b/ext/standard/array.c
index 041c68558ebd39302b3b592a9cae7e357585d2fe..b985b88cd9b2fef6288ea88a7dfe1b17b3d5e17b 100644 (file)
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -3420,10 +3420,12 @@ static void php_array_intersect(INTERNAL_FUNCTION_PARAMETERS, int behavior, int
                        *list++ = *p;
                }
                ZVAL_UNDEF(&list->val);
-               if (behavior == INTERSECT_NORMAL) {
-                       zend_qsort((void *) lists[i], hash->nNumOfElements, sizeof(Bucket), intersect_data_compare_func);
-               } else if (behavior & INTERSECT_ASSOC) { /* triggered also when INTERSECT_KEY */
-                       zend_qsort((void *) lists[i], hash->nNumOfElements, sizeof(Bucket), intersect_key_compare_func);
+               if (hash->nNumOfElements > 1) {
+                       if (behavior == INTERSECT_NORMAL) {
+                               zend_qsort((void *) lists[i], hash->nNumOfElements, sizeof(Bucket), intersect_data_compare_func);
+                       } else if (behavior & INTERSECT_ASSOC) { /* triggered also when INTERSECT_KEY */
+                               zend_qsort((void *) lists[i], hash->nNumOfElements, sizeof(Bucket), intersect_key_compare_func);
+                       }
                }
        }
 
@@ -3838,10 +3840,12 @@ static void php_array_diff(INTERNAL_FUNCTION_PARAMETERS, int behavior, int data_
                        *list++ = *p;
                }
                ZVAL_UNDEF(&list->val);
-               if (behavior == DIFF_NORMAL) {
-                       zend_qsort((void *) lists[i], hash->nNumOfElements, sizeof(Bucket), diff_data_compare_func);
-               } else if (behavior & DIFF_ASSOC) { /* triggered also when DIFF_KEY */
-                       zend_qsort((void *) lists[i], hash->nNumOfElements, sizeof(Bucket), diff_key_compare_func);
+               if (hash->nNumOfElements > 1) {
+                       if (behavior == DIFF_NORMAL) {
+                               zend_qsort((void *) lists[i], hash->nNumOfElements, sizeof(Bucket), diff_data_compare_func);
+                       } else if (behavior & DIFF_ASSOC) { /* triggered also when DIFF_KEY */
+                               zend_qsort((void *) lists[i], hash->nNumOfElements, sizeof(Bucket), diff_key_compare_func);
+                       }
                }
        }