(PHP 4, PHP 5)
Finds whether the given variable is a boolean.
The variable being evaluated.
Returns TRUE if var is a boolean, FALSE otherwise.
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"; } ?>
is_array