(PHP 4 , PHP 5)
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_integer(), is_string(), and is_object().
