is_bool

Description

Returns TRUE if the var parameter is a boolean.

Example 1. is_bool() examples <?php $a = false; $b = 0; // Since $a is a boolean, this is true if (is_bool($a)) {     echo "Yes, this is a boolean"; } // Since $b is not a boolean, this is not true if (is_bool($b)) {     echo "Yes, this is a boolean"; } ?>

See also is_array(), is_float(), is_int(), is_string(), and is_object().