Checks if the object or class has a property (original) (raw)

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 TRUE even if the property has the value NULL.

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 registeredautoloaders if the class is not already known.

Note:

The property_exists() function cannot detect properties that are magically accessible using the __get magic method.

Changelog

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')); //true
var_dump(property_exists(new myClass, 'mine')); //true
var_dump(property_exists('myClass', 'xpto')); //true, as of PHP 5.3.0
var_dump(property_exists('myClass', 'bar')); //false
var_dump(property_exists('myClass', 'test')); //true, as of PHP 5.3.0
myClass::test();?> `