is_a
(PHP 4 >= 4.2.0, PHP 5)
is_a — Checks if the object is of this class or has this class as one of its parents
Description
bool is_a
( object $object
, string $class_name
)
Note:
The is_a() function is deprecated as of PHP 5 in
favor of the instanceof
type operator.
Parameters
-
object
-
The tested object
-
class_name
-
The class name
Return Values
Returns TRUE if the object is of this class or has this class as one of
its parents, FALSE otherwise.
Examples
Example #1 is_a() example
<?php
class WidgetFactory
{
var $oink = 'moo';
}
$WF = new WidgetFactory();
if (is_a($WF, 'WidgetFactory')) {
echo "yes, \$WF is still a WidgetFactory\n";
}
?>
Example #2 Using the instanceof operator in PHP 5
<?php
if ($WF instanceof WidgetFactory) {
echo 'Yes, $WF is a WidgetFactory';
}
?>
interface_exists
