Don't miss simple array pattern matching since php 7
<?php
[$a] = ['hello!'];
var_dump($a); // 'hello!'
$arr = [4 => 50];
[4 => $fifty] = $arr;
var_dump($fifty); // 50
$multidimensionalArray = [['id' => 15, 'email' => '[email protected]']];
[['id' => $id, 'email' => $email]] = $multidimensionalArray;
var_dump($id, $email); // 15 [email protected]
?>