Php is a () function

Write your php code

(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

Syntax

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";
}
?>

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';
}
?>

Php is a Function syntax tag

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Php is a syntax tutorial

php tutorial guide and code design are for easy learning and programming. The code practice section provided at the top is for practising of this syntax. Use the code section up to practice your php programming online. Learning php is very easy, all you need is to use the examples on this site and practice them to perfect your skills.