Checks if the object or class has a property
Syntax
property_exists ( mixed $class , string $property ) : bool
Parameters
classThe class name or an object of the class to test for
propertyThe name of the property
Return
Returns TRUE if the property exists, FALSE if it doesn't exist or NULL in case of an error.
Examples
1 · Object
<?
class myclass
{
public $var1;
protected $var2;
private $var3;
static $var4;
}
$class = new myclass();
$property1 = "var1";
$property2 = "var2";
$property3 = "var3";
$property4 = "var4";
$return1 = property_exists($class, $property1);
$return2 = property_exists($class, $property2);
$return3 = property_exists($class, $property3);
$return4 = property_exists($class, $property4);
var_dump($return1, $return2, $return3, $return4);
?>bool(true) bool(true) bool(true) bool(true)
2 · Class Name
<?
class myclass
{
public $var1;
protected $var2;
private $var3;
static $var4;
}
$class = "myclass";
$property1 = "var1";
$property2 = "var2";
$property3 = "var3";
$property4 = "var4";
$return1 = property_exists($class, $property1);
$return2 = property_exists($class, $property2);
$return3 = property_exists($class, $property3);
$return4 = property_exists($class, $property4);
var_dump($return1, $return2, $return3, $return4);
?>bool(true) bool(true) bool(true) bool(true)
3 · namespace
<?
namespace mynamespace;
class myclass
{
public $var1;
protected $var2;
private $var3;
static $var4;
}
$class = "mynamespace\myclass";
$property1 = "var1";
$property2 = "var2";
$property3 = "var3";
$property4 = "var4";
$return1 = property_exists($class, $property1);
$return2 = property_exists($class, $property2);
$return3 = property_exists($class, $property3);
$return4 = property_exists($class, $property4);
var_dump($return1, $return2, $return3, $return4);
?>bool(true) bool(true) bool(true) bool(true)
