constant

Function • Params and return types changed in PHP 8.0

Returns the value of a constant.

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

constant Function synopsis

constant(string $name): mixed

Parameters

$name

Typestring

The constant name.

Return value

Typemixed

Returns the value of the constant.

Changes to the constant Function

PHP 8.0

  • Return type added: mixed
  • Parameter name of parameter #1 changed: $const_name to $name
  • Parameter type added for parameter #1 ($name): string
- constant($const_name)
+ constant(string $name): mixed

constant 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