is_bool
PHP function
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(PHP 4, PHP 5, PHP 7, PHP 8)
Finds out whether a variable is a boolean
Description
is_bool(mixed $value): bool
Finds whether the given variable is a boolean.
Parameters
valueThe variable being evaluated.
Return Values
Returns true if value is a bool, false otherwise.
Examples
is_bool() examples
php
<?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\n";
}
// Since $b is not a boolean, it will return false
if (is_bool($b) === false) {
echo "No, this is not a boolean\n";
}
?>