array_column

Function • Params and return types changed in PHP 8.0

Return the values from a single column in the input array.

PHP 5.3-5.4
PHP 5.5
Added
PHP 5.6
PHP 7
PHP 8.0
Improved
PHP 8.1
PHP 8.2-8.3
PHP 8.4
PHP 8.5
PHP 8.6
PHP 8.7

array_column Function synopsis

array_column(
    array $array,
    string|int|null $column_key,
    string|int|null $index_key = null
  ): array

Parameters

$array

Typearray

$column_key

Typestring|int|null

$index_key

OptionalTypestring|int|nullDefault valuenull

The column to use as the index/keys for the returned array. This value may be the integer key of the column, or it may be the string key name. The value is cast as usual for array keys (however, prior to PHP 8.0.0, objects supporting conversion to string were also allowed).

Return value

Typearray

Changes to the array_column Function

PHP 8.0

  • Return type added: array
  • Parameter name of parameter #1 changed: $arg to $array
  • Parameter type added for parameter #1 ($array): array
  • Parameter type added for parameter #2 ($column_key): string|int|null
  • Parameter type added for parameter #3 ($index_key): string|int|null
  • Parameter default value added for position #3 ($index_key): null
  array_column(
-     $arg,
+     array $array,
-     $column_key,
+     string|int|null $column_key,
-     $index_key
+     string|int|null $index_key = null
-   )
+   ): array

PHP 5.5

  • Function added

array_column Function Availability

PHP VersionAvailability
PHP 8.7Future Release Yes
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 No
PHP 5.3Unsupported No