acos

Function • Params and return types changed in PHP 8.0

Arc cosine.

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

acos Function synopsis

acos(float $num): float

Parameters

$num

Typefloat

The argument to process

Return value

Typefloat

The arc cosine of $num in radians.

Changes to the acos Function

PHP 8.0

  • Return type added: float
  • Parameter name of parameter #1 changed: $number to $num
  • Parameter type added for parameter #1 ($num): float
- acos($number)
+ acos(float $num): float

acos Function Availability

PHP VersionAvailability
PHP 8.6Upcoming Release Yes
PHP 8.5Supported (Latest) Yes
PHP 8.4Supported Yes
PHP 8.3Security-Fixes Only Yes
PHP 8.2Security-Fixes Only Yes
PHP 8.1Unsupported 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