On the Laravel News site they've shown a spotlight on a new feature that's coming with the next major release of the PHP language (v7.3): outer array functions.

PHP 7.3 introduces two new array functions for working with the “outer” keys of an array. The RFC proposal included four new functions for both keys and values, but only the array key functions were accepted: array_key_first() and array_key_last().

[...] Although the outer array value functions were declined, at least new functions will be available for getting the outer keys of an array.

They then provide some code examples of this new functionality, showing how use these new functions to extract values. It also includes examples of the two functions - array_value_first and array_value_last - that were rejected from the RFC when voting happened.