is_bool
(PHP 4, PHP 5)
is_bool --
Finds out whether a variable is a boolean
Описание
bool
is_bool ( mixed var )
Finds whether the given variable is a boolean.
Список параметров
- var
The variable being evaluated.
Возвращаемые значения
Returns TRUE if var is a boolean,
FALSE otherwise.
Примеры
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"; } ?>
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