PHP is_bool() function PHP
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PHP is_bool() function
PHP is_bool() function
By using this function, we can check whether the variable is boolean variable or not.
Syntax
- bool is_bool ( mixed $var )
Parameters
| Parameter | Description | Is compulsory |
|---|---|---|
| var_name | The variable being evaluated. | compulsory |
Returns
It return True if var is boolean, False otherwise.
Example 1
- <?php
- $x=false;
- echo is_bool($x);
- ?>
Output:
Example 2
- <?php
- $y=false;
- if (is_bool($y))
- echo 'This is a boolean type.';
- else
- echo 'This is not a boolean type.';
- ?>
Output:
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