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property_exists
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property_exists

(PHP 5 >= 5.1.0RC1)

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 (and if it is accessible from the current scope).

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.

Examples

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();

?>

See Also

method_exists()

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