PHP is bool

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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 :

  1. $var_name=false;  

  2. if (is_bool($var_name))  

  3. echo 'This is a boolean.';  

  4. else  

  5. echo 'This is not a boolean.';  

  6. ?>  

Output :

This is a boolean.