(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.
Пример 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" ; } ?>