是否可以在PHP中删除对象的属性？

问题描述：

If I have an stdObject say, $a.

Sure there's no problem to assign a new property, $a,

$a->new_property = $xyz;

But then I want to remove it, so unset is of no help here.

So,

$a->new_property = null;

is kind of it. But is there a more 'elegant' way?

答

unset($a->new_property);

This works for array elements, variables, and object attributes.

Example:

$a = new stdClass();

$a->new_property = 'foo';
var_export($a);  // -> stdClass::__set_state(array('new_property' => 'foo'))

unset($a->new_property);
var_export($a);  // -> stdClass::__set_state(array())

答

This also works specially if you are looping over an object.

unset($object[$key])

Update

Newer versions of PHP throw fatal error Fatal error: Cannot use object of type Object as array as mentioned by @CXJ . In that case you can use brackets instead

unset($object{$key})

答

This also works if you are looping over an object.

unset($object->$key);

No need to use brackets.

是否可以在PHP中删除对象的属性？

Update

相关推荐