Online PHP editor | output for BGguO

@ 2022-07-09T01:42:43Z

<?php

$unresponsives = [
    [
        "Customer",
        "172.52.46.75",
        "2022-04-01 16:20:45",
        "1817",
        "nxlog",
        "2328.02 Hours"
    ],
    [
        "Customer",
        "172.25.89.45",
        "2022-04-01 16:20:45",
        "1817",
        "nxlog",
        "Undefined"
    ],
    [
        "Customer",
        "172.19.10.94",
        "2022-04-01 16:20:45",
        "1817",
        "nxlog",
        "324.02 Hours"
    ],
    [
        "Customer",
        "172.19.10.94",
        "2022-04-01 16:20:45",
        "1817",
        "nxlog",
        "2322.02 Hours"
    ],
    [
        "Customer",
        "172.19.10.94",
        "2022-04-01 16:20:45",
        "1817",
        "nxlog",
        "Undefined"
    ],
];

$sortingArray = array_map(fn($a) => sscanf($a[5], '%f')[0] ?? PHP_INT_MAX, $unresponsives);
array_multisort($sortingArray, SORT_DESC, $unresponsives);
var_export($unresponsives);

Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7: array ( 0 => array ( 0 => 'Customer', 1 => '172.19.10.94', 2 => '2022-04-01 16:20:45', 3 => '1817', 4 => 'nxlog', 5 => 'Undefined', ), 1 => array ( 0 => 'Customer', 1 => '172.25.89.45', 2 => '2022-04-01 16:20:45', 3 => '1817', 4 => 'nxlog', 5 => 'Undefined', ), 2 => array ( 0 => 'Customer', 1 => '172.52.46.75', 2 => '2022-04-01 16:20:45', 3 => '1817', 4 => 'nxlog', 5 => '2328.02 Hours', ), 3 => array ( 0 => 'Customer', 1 => '172.19.10.94', 2 => '2022-04-01 16:20:45', 3 => '1817', 4 => 'nxlog', 5 => '2322.02 Hours', ), 4 => array ( 0 => 'Customer', 1 => '172.19.10.94', 2 => '2022-04-01 16:20:45', 3 => '1817', 4 => 'nxlog', 5 => '324.02 Hours', ), )

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