example.php

<?php

$array = ['a' => 1 , 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5, 'f' => 6];

// get the “rest of the values” from an array, when doing destructuring assignment, as a new array.

[$a, $b, ...$others] = $array;

var_dump($a) // int(1)
var_dump($b) // int(2)
var_dump($others) // array('c' => 3, 'd' => 4, 'e' => 5, 'f' => 6)

//  “re”-structure

$anotherArray = ['a' => $a, 'b' => $b, ...$others];
var_dump($anotherArray) // array('a' => 1 , 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5, 'f' => 6)
var_dump($anotherArray === $array) // bool(true)

$azjezz = [
    'name' => 'azjezz',
    'location' => 'tunisia',
];

$other = [
    'name' => 'sameh',  
];

//  “last one in wins” – meaning if an array at the end of the list (on the right) has the same key as a previous array in the list, the previous value will be overwritten.

$sameh = [...$azjezz, ...$other];

var_dump($sameh) // array('name' => 'sameh', 'location' => 'tunisia')


$default = [
  'alpha' => 10,
  'beta' => 11,
];

$config = ['alpha' => 15];

$config = [...$default, ...$config];

var_dump($config); // array('alpha' => 15, 'beta' => 11);