get_defined_constants

Function • Params and return types changed in PHP 8.0

Returns an associative array with the names of all the constants and their values.

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

get_defined_constants Function synopsis

get_defined_constants(bool $categorize = false): array

Parameters

$categorize

OptionalTypeboolDefault valuefalse

Causing this function to return a multi-dimensional array with categories in the keys of the first dimension and constants and their values in the second dimension.

Return value

Typearray

Changes to the get_defined_constants Function

PHP 8.0

  • Return type added: array
  • Parameter type added for parameter #1 ($categorize): bool
  • Parameter default value added for position #1 ($categorize): false
- get_defined_constants($categorize)
+ get_defined_constants(bool $categorize = false): array

get_defined_constants 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