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property_exists

(PHP 5 >= 5.1.0RC1)

property_exists --  Checks if the object or class has a property

说明

bool property_exists ( mixed class, string property )

This function checks if the given property exists in the specified class (and if it was declared as public).

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

参数

class

A string with the class name or an object of the class to test for

property

The name of the property

返回值

Returns TRUE if the property exists or FALSE otherwise.

范例

例子 1. A property_exists() example

<?php

class myClass {
    public $mine;
    private $xpto;
}

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

?>

参见

method_exists()



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method_exists上一级Classkit Functions