PHP Internals Deep Dive



@@ -1068,6 +1073,8 @@ ZEND_API int zend_std_has_dimension(zend_object *object, zval *offset, int check
                }
                OBJ_RELEASE(object);
                zval_ptr_dtor(&tmp_offset);
+       } else if (zend_class_implements_interface(ce, zend_ce_collection)) {
+               return zend_collection_has_item(object, offset);
        } else {
                zend_bad_array_access(ce);
                return 0;

Zend/zend_collection.c



int zend_collection_has_item(zend_object *object, zval *offset)
{
       zval rv;
       zval *value_prop;
       zend_class_entry *ce = object->ce;

       if (!key_type_allowed(ce, offset)) {
               return false;
       }

       value_prop = zend_read_property_ex(ce, object, ZSTR_KNOWN(ZEND_STR_VALUE), true, &rv);
       if (Z_TYPE_P(offset) == IS_STRING) {
               return zend_hash_find(HASH_OF(value_prop), Z_STR_P(offset)) != NULL;
       } else {
               return zend_hash_index_find(HASH_OF(value_prop), Z_LVAL_P(offset)) != NULL;
       }

       return false;
}