Php/docs/function.property-exists
property_exists
(PHP 5 >= 5.1.0, PHP 7)
property_exists — Checks if the object or class has a property
Description
property_exists
( mixed $class
, string $property
) : bool
This function checks if the given property exists in
the specified class.
Note:
As opposed with isset(), property_exists() returns
TRUEeven if the property has the valueNULL.
Parameters
class- The class name or an object of the class to test for
property- The name of the property
Return Values
Returns TRUE if the property exists, FALSE if it doesn't exist or
NULL in case of an error.
Notes
Note:
Using this function will use any registered autoloaders if the class is not already known.
Note:
The property_exists() function cannot detect properties that are magically accessible using the
__getmagic method.
Examples
Example #1 A property_exists() example
<?phpclass myClass { public $mine; private $xpto; static protected $test; static function test() { var_dump(property_exists('myClass', 'xpto')); //true }}var_dump(property_exists('myClass', 'mine')); //truevar_dump(property_exists(new myClass, 'mine')); //truevar_dump(property_exists('myClass', 'xpto')); //true, as of PHP 5.3.0var_dump(property_exists('myClass', 'bar')); //falsevar_dump(property_exists('myClass', 'test')); //true, as of PHP 5.3.0myClass::test();?>
