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.

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.

Rejestr zmian

Wersja Opis
5.3.0 This function checks the existence of a property independent of accessibility.

Przykłady

Przykład #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();

?>

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Funkcje Klasy/Obiekty
PHP Manual