php获取本周时间方法

// 获取本周时间
$nowDate = date('Y-m-d');
$week = date('w', strtotime($nowDate));
$start_time = strtotime("$nowDate - " . ($week ? $week - 1 : 6).' days');
// 本月时间
$start_time = date('Y-m-01');