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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https://www.w3resource.com/php/function-reference/is_bool.php
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