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Php is a () function

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(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';
}
?>

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

Php is a Function syntax tag

is a php code on this is provided for your study purpose, it will guide you to know how create and design a website using php. use it to practice and train your self online



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.


Function index

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Control-Structures

Cookies

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Directory function

File

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Form data handling

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