property_exists

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

property_exists Checks if the object or class has a property

Descrizione

property_exists(object|string $object_or_class, string $property): bool

This function checks if the given property exists in the specified class.

Nota:

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

Elenco dei parametri

object_or_class

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

property

The name of the property

Valori restituiti

Returns true if the property exists, false if it doesn't exist.

Esempi

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
var_dump(property_exists('myClass', 'bar')); //false
var_dump(property_exists('myClass', 'test')); //true
myClass::test();

?>

Note

Nota:

L'utilizzo di questa funzione attiverà tutti gli autoloaders se la classe non è già conosciuta.

Nota:

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

Vedere anche: