PHP日期操作

  //返回指定月份的第一天  function get_the_month_first_day_str($theyear, $themonth) {    return date("Y-m-d", mktime(0, 0, 0, $themonth, 1, $theyear));  }    //返回指定月份的最後一天  function get_the_month_last_day_str($theyear, $themonth) {    $theday = date("t", mktime(0, 0, 0, $themonth, 1, $theyear));    return date("Y-m-d", mktime(0, 0, 0, $themonth, $theday, $theyear));  }    //返回指定日期所在周的第一天(周日為第一天，周一為第二天，以此類推)  function get_the_week_first_day_str($theyear, $themonth, $theday) {  $date = mktime(0, 0, 0, $themonth, $theday, $theyear);  $date = $date - (24 * 60 * 60 * date("w", $date));  return date("Y-m-d", $date);  }    //返回指定日期所在周的最後一天(周日為第一天，周一為第二天，以此類推)  function get_the_week_last_day_str($theyear, $themonth, $theday) {  $date = mktime(0, 0, 0, $themonth, $theday, $theyear);  $date = $date - (24 * 60 * 60 * date("w", $date)) + (24 * 60 * 60 * 6);  return date("Y-m-d", $date);  }

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以上就介紹了PHP日期操作，包括了方面的內容，希望對PHP教程有興趣的朋友有所協助。

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