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@ 2023-01-20T07:14:51Z

<?php

$array = [
    [],
    ['2011','2010', '2012'],
    ['conference', 'journal', 'conference'],
];

function array_multisort_custom(array &$array, $columnKey, array $order)
{
    // guard clause/condition
    if (!array_key_exists($columnKey, $array)) {
        throw new Exception('Nominated sorting column not found');
    }
    
    // pad rows to consistent size
    $maxCount = max(array_map('count', $array));
    array_walk($array, fn(&$row) => $row = array_pad($row, $maxCount, null));

    // populate first sorting parameter with custom order array
    $priority = array_flip($order);
    $default = count($order);

    array_multisort(
        array_map(fn($v) => $priority[$v] ?? $default, $array[$columnKey]),
        ...$array
    );
}

array_multisort_custom($array, 2, ['conference', 'journal']);
var_export($array);

Output for git.master, git.master_jit, rfc.property-hooks: array ( 0 => array ( 0 => NULL, 1 => NULL, 2 => NULL, ), 1 => array ( 0 => '2011', 1 => '2012', 2 => '2010', ), 2 => array ( 0 => 'conference', 1 => 'conference', 2 => 'journal', ), )

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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