<?php $data = json_decode('[ {"idx": "1","mom_member_idx": "1","teacher_member_idx": "2","care_start_datetime": "2019-09-09 08:30:00"}, {"idx": "2","mom_member_idx": "1","teacher_member_idx": "2","care_start_datetime": "2019-09-10 08:30:00"}, {"idx": "3","mom_member_idx": "2","teacher_member_idx": "2","care_start_datetime": "2019-09-09 08:30:00"} ]', true); usort($data, function($a, $b) { return strtotime($a['care_start_datetime']) > strtotime($b['care_start_datetime']) ? -1 : 1; }); unset($data[0]); print_r($data);
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Value for `_results` contains invalid data `array`