(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.
Note:
As opposed with isset(), property_exists() returns
TRUE
even if the property has the valueNULL
.
class
The class name or an object of the class to test for
property
The name of the property
Returns TRUE
if the property exists, FALSE
if it doesn't exist or
NULL
in case of an error.
Note:
Using this function will use any registered autoloaders if the class is not already known.
Note:
The property_exists() function cannot detect properties that are magically accessible using the __get magic method.
Version | Description |
---|---|
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();
?>