array_merge_recursive

Function • Params and return types changed in PHP 8.0

Merge one or more arrays recursively.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2-8.3

PHP 8.4

PHP 8.5

PHP 8.6

array_merge_recursive(array ...$arrays): array

Variadic, OptionalTypearray

Variable list of arrays to recursively merge.

Typearray

An array of values resulted from merging the arguments together. If called without any arguments, returns an empty array.

Changes to the `array_merge_recursive` Function

- array_merge_recursive(...$arrays)
+ array_merge_recursive(array ...$arrays): array

- array_merge_recursive($arr1, ...$arrays)
+ array_merge_recursive(...$arrays)