property_exists
(PHP 5 >= 5.1.0, PHP 7)
property_exists — Checks if the object or class has a property
Description
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
.
Parameters
-
class
-
The class name or an object of the class to test for
-
property
-
The name of the property
Return Values
Returns TRUE
if the property exists, FALSE
if it doesn't exist or
NULL
in case of an error.
Notes
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.
Changelog
Version | Description |
---|---|
5.3.0 | This function checks the existence of a property independent of accessibility. |
Examples
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();
?>
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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-property-exists.html
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References
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