Online PHP editor | output for rjinc

@ 2018-10-14T02:50:07Z

<?php
$array = [
    [
        "route_id" => 1539871200,
        "booking_id" => 171,
        "route" => "Boattrip Destination 2",
        "date" => "18 October 2018",
        "time" => "14:00 - 16:00"
    ],
    [
        "route_id" => 1539856800,
        "booking_id" => 170,
        "route" => "Boattrip Destination 2",
        "date" => "18 October 2018",
        "time" => "10:00 - 12:00"
    ],
    [
        "route_id" => 1539856800,
        "booking_id" => 162,
        "route" => "Boattrip Destination 2",
        "date" => "18 October 2018",
        "time" => "10:00 - 12:00"
    ]
];

foreach ($array as $set) {
    if (isset($result[$set["route_id"]])) {
        $result[$set["route_id"]]["booking_ids"][] = $set["booking_id"];
    } else {
        $result[$set["route_id"]] = [
            "route" => $set["route_id"],
            "date" => $set["date"],
            "time" => $set["time"],
            "booking_ids" => [$set["booking_id"]]
        ];
    }
}
ksort($result);  // ... you did say you wanted to sort them by route_id
var_export($result);

Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: array ( 1539856800 => array ( 'route' => 1539856800, 'date' => '18 October 2018', 'time' => '10:00 - 12:00', 'booking_ids' => array ( 0 => 170, 1 => 162, ), ), 1539871200 => array ( 'route' => 1539871200, 'date' => '18 October 2018', 'time' => '14:00 - 16:00', 'booking_ids' => array ( 0 => 171, ), ), )
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array ( 1539856800 => array ( 'route' => 1539856800, 'date' => '18 October 2018', 'time' => '10:00 - 12:00', 'booking_ids' => array ( 0 => 170, 1 => 162, ), ), 1539871200 => array ( 'route' => 1539871200, 'date' => '18 October 2018', 'time' => '14:00 - 16:00', 'booking_ids' => array ( 0 => 171, ), ), )

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