復制代碼 代碼如下:

<?php
class foo {}
$bar = new foo();
echo $bar instanceof stdClass?'yes':'no';
//output：no

復制代碼 代碼如下:

<?php
// CTest does not derive from stdClass
class CTest {
public $property1;
}
$t = new CTest;
var_dump($t instanceof stdClass); // false
var_dump(is_subclass_of($t, 'stdClass')); // false
echo get_class($t) . "/n"; // 'CTest'
echo get_parent_class($t) . "/n"; // false (no parent)
?>

復制代碼 代碼如下:

class EmptyClass {

}
$object = new EmptyClass();
if ($object instanceof stdClass) {
echo 'yes';
}else{
echo 'no';
}

復制代碼 代碼如下:

ZEND_MINIT_FUNCTION(core) { /* {{{ */
zend_class_entry class_entry;
/* 注冊stdClass 類 */
INIT_CLASS_ENTRY(class_entry, "stdClass", NULL);
zend_standard_class_def = zend_register_internal_class(&class_entry TSRMLS_CC);

/* 注冊默認類，接口，如Exception類，SPL中的一些類等 */
zend_register_default_classes(TSRMLS_C);
return SUCCESS;
}
/* }}} */