is_bool
(PHP 4 , PHP 5) is_bool --
Finds out whether a variable is a boolean
Описаниеbool is_bool ( mixed var ) Finds whether the given variable is a boolean.
Список параметров- var
The variable being evaluated.
Возвращаемые значенияReturns 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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