array_fill_keys

Function • Params and return types changed in PHP 8.0

Fill an array with values, specifying keys.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2-8.3

PHP 8.4

PHP 8.5

PHP 8.6

`array_fill_keys` Function synopsis

array_fill_keys(array $keys, mixed $value): array

Parameters

`$keys`

Typearray

Array of values that will be used as keys. Illegal values for key will be converted to string.

`$value`

Typemixed

Value to use for filling

Return value

Typearray

Returns the filled array

Changes to the `array_fill_keys` Function

PHP 8.0

Return type added: array
Parameter type added for parameter #1 ($keys): array
Parameter name of parameter #2 changed: $val to $value
Parameter type added for parameter #2 ($value): mixed

- array_fill_keys($keys, $val)
+ array_fill_keys(array $keys, mixed $value): array

`array_fill_keys` Function Availability

PHP Version	Availability
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