<?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']));
$tmp_array[$cDate]['new_visitors'] = (isset($tmp_array[$cDate]['new_visitors'])) ? $tmp_array[$cDate]['new_visitors'] + $val['new_visitors'] : $val['new_visitors'];
$tmp_array[$cDate]['ids'][] = $val['id'];
}
print_r($tmp_array);
preferences:
63.47 ms | 402 KiB | 5 Q