An alternative idea to the <=> T_SPACESHIP from https://wiki.php.net/rfc/combined-comparison-operator

getter_sort.php

<?php

/**
 * User Getter Sort - Sorts an array using a user defined getter function.
 * 
 * An imaginary user defined sort alternative where you pass a function that
 * returns the data that should be used to determine sort order
 * @param array &$array Array to sort in place
 * @param Callable $itemfunc The callable that receives the array
 *                           item and returns the value that should
 *                           be used for sorting
 */
function ugsort(&$array, $itemfunc = function($item) {return $item});

// rewrite examples from https://wiki.php.net/rfc/combined-comparison-operator using ugsort

// Use case #1 Sort by last name
usort($data, function ($left, $right) {
     return $left[1] <=> $right[1];
});

// ugsort version
ugsort($data, function ($item) {
     return $item[1];
});

// sort by arrays
function order_func($a, $b) {
    return [$a->x, $a->y, $a->foo] <=> [$b->x, $b->y, $b->foo];
}
usort(&$array, 'order_func');

// ugsort version
ugsort($data, function ($item) {
     return [$item->x, $item->y, $item->foo];
});
 

$itemfunc works similarly to cmp= in python's sorted