Description
bool
is_a ( object object, string class_name )
This function returns TRUE if the object is of this class or
has this class as one of its parents, FALSE otherwise.
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";
}
?>
|
|
The is_a() function is deprecated as of PHP 5 in
favor of the instanceof
type operator. In the above example we could use the following in
PHP 5:
Example 2. Using the instanceof operator in PHP 5 |
<?php
if ($WF instanceof WidgetFactory) {
echo 'Yes, $WF is a WidgetFactory';
}
?>
|
|
See also get_class(),
get_parent_class(), and
is_subclass_of().
interface_exists
