property_exists

(PHP 5 >= 5.1.0)

property_exists — Checks if the object or class has a property

Beschreibung

bool property_exists ( mixed $class , string $property )

This function checks if the given property exists in the specified class (and if it is accessible from the current scope).

Hinweis: As opposed with isset(), property_exists() returns TRUE even if the property has the value NULL.

Parameter Liste

class: The class name or an object of the class to test for
property: The name of the property

Rückgabewerte

Returns TRUE if the property exists, FALSE if it doesn't exist or NULL in case of an error.

Beispiele

Example#1 A property_exists() example


<?php

class myClass {
    public $mine;
    private $xpto;

    static function test() {
        var_dump(property_exists('myClass', 'xpto')); // true, it can be accessed from here
    }
}

var_dump(property_exists('myClass', 'mine'));   //true
var_dump(property_exists(new myClass, 'mine')); //true
var_dump(property_exists('myClass', 'xpto'));   //false, isn't public
myClass::test();

?>

Siehe auch

method_exists()