(PHP 4, PHP 5)
is_bool — Finds out whether a variable is a boolean
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";
}
?>