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(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"; } ?>
is_binary
