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@ 2015-10-27T09:09:21Z

<?php

$orders = array(1,2,3,4,5);
$index = 2;
$newOrder = 5; // 1,2,4,5,3
function reorder($index, $newOrder, $orders) {
    $newOrders = array();
    $oldOrder = $index;
    $item = $orders[$index];
    $newOrders[$newOrder - 1] = $item;
    $lowers = array();
    $uppers = array();
    $direction = index - $newOrder;

    foreach ($orders as $i => $v) {
        if ($i < $index) {
            $lowers[] = $i;
        }
        
        if ($i > $index) {
            $uppers[] = $i;
        }
    }
    if ($direction < 0) {
        foreach ($lowers as $i => $v) {
            $newOrders[$v + 1] = $orders[$v];
        }
        foreach ($uppers as $i => $v) {
            $newOrders[$v] = $orders[$v];
        }
    } else {
        foreach ($uppers as $i => $v) {
            $newOrders[$v - 1] = $orders[$v];
        }
        foreach ($lowers as $i => $v) {
            $newOrders[$v] = $orders[$v];
        }
    }
    //ksort($newOrders);
    var_dump($newOrders);
    
}

reorder($index, $newOrder, $orders);

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught Error: Undefined constant "index" in /in/AIVTH:13 Stack trace: #0 /in/AIVTH(44): reorder(2, 5, Array) #1 {main} thrown in /in/AIVTH on line 13
Process exited with code 255.

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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