- strtotime: documentation ( source)
<?php
$mission_type = 0;
$start_dttm = ($mission_type == 0) ? strtotime("last Monday") : strtotime("last Friday"); // 리그 시작 일자
$end_dttm = ($mission_type == 0) ? strtotime("next Tuesday") : strtotime("next Thursday"); // 리그 종료 일자
// echo strtotime("last Monday");
// echo time();
// echo date('ymd', strtotime("this Tuesday"));
// echo '<br>';
// echo date('ymd', strtotime("next Tuesday"));
// echo '<br>';
// echo date('ymd', $start_dttm);
echo strtotime("this Tuesday");
echo strtotime("next Tuesday");