[php-src] Issue #11547: cast_object handler is never called for array cast

Issue: https://github.com/php/php-src/issues/11547 Author: ju1ius ### Description The following code: ```c static zend_class_entry *foo_ce; static zend_object_handlers foo_handlers; PHP_MINIT_FUNCTION(my_extension) { // Class declaration boilerplate omitted foo_ce = register_class_Foo(); // object handlers initialization boilerplate omitted foo_handlers.cast_object = foo_cast_object; foo_ce.default_object_handlers = &foo_handlers; } static zend_result foo_cast_object(zend_object *readobj, zval *writeobj, int type) { switch (type) { case IS_LONG: case _IS_NUMBER: ZVAL_LONG(writeobj, 42); return SUCCESS; case IS_ARRAY: ZVAL_LONG(writeobj, 42); convert_to_array(writeobj); return SUCCESS; default: return FAILURE; } } ``` ```php <?php $foo = new Foo; var_dump((int)$foo); var_dump((array)$foo); ``` Resulted in this output: ``` int(42) array(0) { } ``` But I expected this output instead: ``` int(42) array(1) { [0]=> int(42) } ``` So it seems that the VM unconditionally uses the result of object->handlers->get_properties_for() without checking beforehand if object->handlers->cast_object() returns something. Not _exactly_ a bug per se, but rather yet another quirk whose fixing would improve the usability the extension API, IMO. ### PHP Version 8.3-dev ### Operating System _No response_