(PHP 4, PHP 5, PHP 7)
Finds out whether a variable is a boolean
bool is_bool ( mixed $var )
Finds whether the given variable is a boolean.
Parameters:
var
The variable being evaluated.
Returns:
Returns TRUE if var is a boolean, FALSE otherwise.
Examples:
is_bool() examples
<?php
$a = false;
$b = 0;
// Since $a is a boolean, it will return true
if (is_bool($a) === true) {
echo "Yes, this is a boolean";
}
// Since $b is not a boolean, it will return false
if (is_bool($b) === false) {
echo "No, this is not a boolean";
}
?>
See also:
is_int() -
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