Online PHP editor | output for SuJQX

@ 2022-07-07T16:15:51Z

<?php

var_dump(floatval('Undefined'));
echo PHP_EOL;

$unresponsives2 = $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",
        "2324.02 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"
    ],
];

$hours = array_column($unresponsives, 5);
if ($undefined = array_keys($hours, 'Undefined')) {   
    $hours = array_replace($hours, array_fill_keys($undefined, PHP_INT_MAX));
}
array_multisort($hours, SORT_DESC, SORT_NUMERIC, $unresponsives);

var_export($unresponsives);

echo PHP_EOL . PHP_EOL;

$hours = array_column($unresponsives2, 5);
if ($undefined = array_keys($hours, 'Undefined')) {    
    $hours = array_replace($hours, array_fill_keys($undefined, PHP_INT_MIN));
}
array_multisort($hours, SORT_ASC, SORT_NUMERIC, $unresponsives2);

var_export($unresponsives2);

Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3: float(0) 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 => '2324.02 Hours', ), 4 => array ( 0 => 'Customer', 1 => '172.19.10.94', 2 => '2022-04-01 16:20:45', 3 => '1817', 4 => 'nxlog', 5 => '2322.02 Hours', ), ) 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 => '172.19.10.94', 2 => '2022-04-01 16:20:45', 3 => '1817', 4 => 'nxlog', 5 => '2322.02 Hours', ), 3 => array ( 0 => 'Customer', 1 => '172.19.10.94', 2 => '2022-04-01 16:20:45', 3 => '1817', 4 => 'nxlog', 5 => '2324.02 Hours', ), 4 => array ( 0 => 'Customer', 1 => '172.52.46.75', 2 => '2022-04-01 16:20:45', 3 => '1817', 4 => 'nxlog', 5 => '2328.02 Hours', ), )

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