property_exists

(PHP 5 >= 5.1.0, PHP 7)

property_exists — 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷欠锟斤拷锟叫革拷锟斤拷锟斤拷

说锟斤拷

property_exists ( mixed $class , string $property ) : bool

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Note:

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

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class

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property

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锟斤拷锟斤拷值

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注锟斤拷

Note:

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Note:

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

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锟芥本 说锟斤拷
5.3.0 This function checks the existence of a property independent of accessibility.

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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();

?>

锟轿硷拷

  • method_exists() - 锟斤拷锟斤拷锟侥凤拷锟斤拷锟角凤拷锟斤拷锟�