is_bool

Function • Params and return types changed in PHP 8.0

Finds out whether a variable is a boolean.

PHP 5
PHP 7
PHP 8.0
Improved
PHP 8.1-8.2
PHP 8.3
PHP 8.4
PHP 8.5
PHP 8.6

is_bool Function synopsis

is_bool(mixed $value): bool

Parameters

$value

Typemixed

The variable being evaluated.

Return value

Typebool

Returns true if $value is a bool, false otherwise.

Changes to the is_bool Function

PHP 8.0

  • Return type added: bool
  • Parameter name of parameter #1 changed: $var to $value
  • Parameter type added for parameter #1 ($value): mixed
- is_bool($var)
+ is_bool(mixed $value): bool

is_bool Function Availability

PHP VersionAvailability
PHP 8.6Future Release Yes
PHP 8.5Upcoming Release Yes
PHP 8.4Supported (Latest) Yes
PHP 8.3Supported Yes
PHP 8.2Security-Fixes Only Yes
PHP 8.1Security-Fixes Only Yes
PHP 8.0Unsupported Yes
PHP 7.4Unsupported Yes
PHP 7.3Unsupported Yes
PHP 7.2Unsupported Yes
PHP 7.1Unsupported Yes
PHP 7.0Unsupported Yes
PHP 5.6Unsupported Yes
PHP 5.5Unsupported Yes
PHP 5.4Unsupported Yes
PHP 5.3Unsupported Yes