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is_a

(PHP 4 >= 4.2.0, PHP 5)

is_a --  Returns TRUE 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)

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
// define a class
class WidgetFactory
{
  var $oink = 'moo';
}

// create a new object
$WF = new WidgetFactory();

if (is_a($WF, 'WidgetFactory')) {
  echo "yes, \$WF is still a WidgetFactory\n";
}
?>

See also get_class(), get_parent_class(), and is_subclass_of().

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