Funkcje Klasy/Obiekty
PHP Manual

property_exists

(PHP 5 >= 5.1.0)

property_exists Checks if the object or class has a property

Opis

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).

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

Parametry

class

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

property

The name of the property

Zwracane wartości

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

Przykłady

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();

?>

Patrz także


Funkcje Klasy/Obiekty
PHP Manual