Make array_rand() type info more accurate

Author: nikic

ext/opcache/Optimizer/zend_func_info.c

@@ -388,7 +388,7 @@ static const func_info_t func_infos[] = {
 	FN("array_pad",                    MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_REF | MAY_BE_ARRAY_OF_ANY),
 	F1("array_flip",                   MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_LONG | MAY_BE_ARRAY_OF_STRING),
 	F1("array_change_key_case",        MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_REF | MAY_BE_ARRAY_OF_ANY),
-	F1("array_rand",                   UNKNOWN_INFO),
+	FN("array_rand",                   MAY_BE_LONG | MAY_BE_STRING | MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_LONG | MAY_BE_ARRAY_OF_LONG | MAY_BE_ARRAY_OF_STRING),
 	FN("array_unique",                 MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_REF | MAY_BE_ARRAY_OF_ANY),
 	F1("array_intersect",              MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_REF | MAY_BE_ARRAY_OF_ANY),
 	F1("array_intersect_key",          MAY_BE_ARRAY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_REF | MAY_BE_ARRAY_OF_ANY),