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PHP property_exists

PHP original manual for property_exists [ show | php.net ]

property_exists

(PHP 5 >= 5.1.0, PHP 7)

property_exists — Checks if the object or class has a property

Description

bool property_exists ( mixed $class , string $property )

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 registered autoloaders 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

Version Description
5.3.0 This function checks the existence of a property independent of accessibility.

Examples

Example #1 A property_exists() example

<?php

class 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();

?>

See Also