is_bool
(PHP 4 , PHP 5)
is_bool --
Finds out whether a variable is a boolean
Description
bool
is_bool ( mixed var)
Returns TRUE if the var parameter is
a boolean.
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";
}
?>
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See also
is_array(),
is_float(),
is_int(),
is_integer(),
is_string(), and
is_object().