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Checks if the object is of this class or has this class as one of its parents

interface_exists

Classes/Object Functions

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 )

Checks if the given object is of this class or has this class as one of its parents.

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
// 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";
}
?>

Example #2 Using the instanceof operator in PHP 5

 <?php
if ($WF instanceof WidgetFactory) {
    echo 'Yes, $WF is a WidgetFactory';
}
?>

See Also

interface_exists

Classes/Object Functions