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PHP Tutorial

PHP: is_bool() function

Description

The is_bool() function is used to find whether a variable is an a boolean or not.

Version:

(PHP 4 and above)

Syntax:

is_bool (var_name)

Parameter:

Name Description Required /
Optional
Type
var_name The variable being checked. Required Mixed*

*Mixed: Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value:

TRUE if var_name is a boolean, FALSE otherwise.

Value Type: Boolean.

Example:

<?php
$var_name=false;
if (is_bool($var_name))
echo 'This is a boolean.';
else
echo 'This is not a boolean.';
?>

Output :

This is a boolean.

View the example in the browser



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