(PHP 5 >= 5.1.0)
property_exists — Checks if the object or class has a property
This function checks if the given property exists in
the specified class.
Nota:
As opposed with isset(), property_exists() returns
TRUEeven if the property has the valueNULL.
classThe class name or an object of the class to test for
propertyThe name of the property
Returns TRUE if the property exists, FALSE if it doesn't exist or
NULL in case of an error.
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.
| Versione | Descrizione |
|---|---|
| 5.3.0 | This function checks the existence of a property independent of accessibility. |
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();
?>