Online PHP editor | output for op6mq

@ 2020-02-13T12:40:25Z

<?php

$cms = Array
(
    '0' => Array
        (
            'id' => 31,
            'day_date' => '2020-01-30 00:00:00',
            'new_visitors' => 459
        ),

    '1' => Array
        (
            'id' => 32,
            'day_date' => '2020-01-31 00:00:00',
            'new_visitors' => 338
        ),

    '2' => Array
        (
            'id' => 33,
            'day_date' => '2020-02-01 00:00:00',
            'new_visitors' => 242
        ),

    '3' => Array
        (
            'id' => 34,
            'day_date' => '2020-02-02 00:00:00',
            'new_visitors' => 219
        )

);

$tmp_array = array();
foreach ($cms as $key => $val) {

    $cDate = date('Ym', strtotime($val['day_date']));

    if (array_key_exists($cDate, array_keys($tmp_array))) {
        $tmp_array[$cDate]['new_visitors'] += $val['new_visitors'];
    } else {
        $tmp_array[$cDate]['new_visitors'] = $val['new_visitors'];
    }
    $tmp_array[$cDate]['ids'][] = $val['id'];

}

print_r($tmp_array);

Output for 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 ( [202001] => Array ( [new_visitors] => 338 [ids] => Array ( [0] => 31 [1] => 32 ) ) [202002] => Array ( [new_visitors] => 219 [ids] => Array ( [0] => 33 [1] => 34 ) ) )
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 ( [202001] => Array ( [new_visitors] => 338 [ids] => Array ( [0] => 31 [1] => 32 ) ) [202002] => Array ( [new_visitors] => 219 [ids] => Array ( [0] => 33 [1] => 34 ) ) )

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