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int strtotime ( string time [, int now] )
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(1)´òÓ¡Ã÷Ìì´ËʱµÄʱ¼ä´Ástrtotime("+1 day")
µ±Ç°Ê±¼ä£ºecho date("Y-m-d H:i:s",time()) ½á¹û£º2009-01-22 09:40:25
Ö¸¶¨Ê±¼ä£ºecho date("Y-m-d H:i:s",strtotime("+1 day")) ½á¹û£º2009-01-23 09:40:25
(2)´òÓ¡×òÌì´ËʱµÄʱ¼ä´Ástrtotime("-1 day")
µ±Ç°Ê±¼ä£ºecho date("Y-m-d H:i:s",time()) ½á¹û£º2009-01-22 09:40:25
Ö¸¶¨Ê±¼ä£ºecho date("Y-m-d H:i:s",strtotime("-1 day")) ½á¹û£º2009-01-21 09:40:25
(3)´òӡϸöÐÇÆÚ´ËʱµÄʱ¼ä´Ástrtotime("+1 week")
µ±Ç°Ê±¼ä£ºecho date("Y-m-d H:i:s",time()) ½á¹û£º2009-01-22 09:40:25
Ö¸¶¨Ê±¼ä£ºecho date("Y-m-d H:i:s",strtotime("+1 week")) ½á¹û£º2009-01-29 09:40:25
(4)´òÓ¡ÉϸöÐÇÆÚ´ËʱµÄʱ¼ä´Ástrtotime("-1 week")
µ±Ç°Ê±¼ä£ºecho date("Y-m-d H:i:s",time()) ½á¹û£º2009-01-22 09:40:25
Ö¸¶¨Ê±¼ä£ºecho date("Y-m-d H:i:s",strtotime("-1 week")) ½á¹û£º2009-01-15 09:40:25
(5)´òÓ¡Ö¸¶¨ÏÂÐÇÆÚ¼¸µÄʱ¼ä´Ástrtotime("next Thursday")
µ±Ç°Ê±¼ä£ºecho date("Y-m-d H:i:s",time()) ½á¹û£º2009-01-22 09:40:25
Ö¸¶¨Ê±¼ä£ºecho date("Y-m-d H:i:s",strtotime("next Thursday")) ½á¹û£º2009-01-29 00:00:00
(6)´òÓ¡Ö¸¶¨ÉÏÐÇÆÚ¼¸µÄʱ¼ä´Ástrtotime("last Thursday")
µ±Ç°Ê±¼ä£ºecho date("Y-m-d H:i:s",time()) ½á¹û£º2009-01-22 09:40:25
Ö¸¶¨Ê±¼ä£ºecho date("Y-m-d H:i:s",strtotime("last Thursday")) ½á¹û£º2009-01-15 00:00:00
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