Cannot mix keyed and unkeyed array entries in assignments

Description

list() is a construct that maps an array to a set of variables. The assignation is done by position, or by key. By position, this means the first value of the array goes to the first variable of the list() : in that case, list() doesn’t specify keys with the => operator. On the other hand, the key are matched by their value, and not their position. The error here happens when list() syntax is created with a mixed set of position and key assignations.

Example

<?php

$array = [];

list(
    '' => $foo,
    $bar
) = $array;
?>

Solutions

• Remove all the => operators in the list() call.

• Add all the => operators in the list() call.

• Make the assignations in a different way.