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    <?php
      header("content-type:text/html;charset=utf-8");
      date_default_timezone_set('PRC');
      function getWeek($unixTime=''){
        $unixTime=is_numeric($unixTime)?$unixTime:time();
        $weekarray=array('ÈÕ','Ò»','¶þ','Èý','ËÄ','Îa','Áu','Æß');
        return "ÐÇÆÚ".$weekarray[date('w',$unixTime)];
      }
      $var=getWeek();
      switch($var){
        case 'ÐÇÆÚÌi':
          $var=time();
          $var2=$var-(84600*6);
          echo "½ñÌiÊÇ".date("Y-m-d",$var)."ºÅ<br/>Õa¸oÐÇÆÚÒ»ÊÇ".date("Y-m-d",$var2)."ºÅ";
        break;
        case 'ÐÇÆÚÒ»':
          $var=time();
          $var2=$var;
          echo "½ñÌiÊÇ".date("Y-m-d",$var)."ºÅ<br/>Õa¸oÐÇÆÚÒ»ÊÇ".date("Y-m-d",$var2)."ºÅ";
        break;
        case 'ÐÇÆÚ¶þ':
          $var=time();
          $var2=$var-84600;
          echo "½ñÌiÊÇ".date("Y-m-d",$var)."ºÅ<br/>Õa¸oÐÇÆÚÒ»ÊÇ".date("Y-m-d",$var2)."ºÅ";
        break;
        case 'ÐÇÆÚÈý':
          $var=time();
          $var2=$var-(84600*2);
          echo "½ñÌiÊÇ".date("Y-m-d",$var)."ºÅ<br/>Õa¸oÐÇÆÚÒ»ÊÇ".date("Y-m-d",$var2)."ºÅ";
        break;
        case 'ÐÇÆÚËÄ':
          $var=time();
          $var2=$var-(84600*3);
          echo "½ñÌiÊÇ".date("Y-m-d",$var)."ºÅ<br/>Õa¸oÐÇÆÚÒ»ÊÇ".date("Y-m-d",$var2)."ºÅ";
        break;
        case 'ÐÇÆÚÎa':
          $var=time();
          $var2=$var-(84600*4);
          echo "½ñÌiÊÇ".date("Y-m-d",$var)."ºÅ<br/>Õa¸oÐÇÆÚÒ»ÊÇ".date("Y-m-d",$var2)."ºÅ";
        break;
        case 'ÐÇÆÚÁu':
          $var=time();
          $var2=$var-(84600*5);
          echo "½ñÌiÊÇ".date("Y-m-d",$var)."ºÅ<br/>Õa¸oÐÇÆÚÒ»ÊÇ".date("Y-m-d",$var2)."ºÅ";
        break;
      }
    ?>

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ÔÚÏßÈÕÆÚ/ÌiÊý¼ÆËaÆ÷£º
http://tools.jb51.net/jisuanqi/date_jisuanqi

ÔÚÏßÈÕÆÚ¼ÆËaÆ÷/Ïa²iÌiÊý¼ÆËaÆ÷£º
http://tools.jb51.net/jisuanqi/datecalc

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http://tools.jb51.net/jisuanqi/onlinedatejsq

Unixʱ¼a´Á(timestamp)ת»»¹¤¾ß£º
http://tools.jb51.net/code/unixtime

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