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$s = 'Y1320101000000XP1026629512V544930568T6B15120K20000028';
$mtime = date("Ymd",mktime(0,0,0,1,1,'20'.substr($s,-14,2)) + substr($s,-12,3) * 86400)-1;
echo $mtime; //得到结果是20150500
echo get_str_date('15140');
function get_str_date($str)
{
$y = substr(date('Y'),0,2);
$date_str = strtotime($y.substr($str,0,2).'-01-01') + (substr($str,-3,3) * 86400)-1;
return date('Y-m-d',$date_str);
}
$s = 'Y1320101000000XP1026629512V544930568T6B15120K20000028';
$mtime = date("Ymd", mktime(0, 0, 0, 1, substr($s,-12,3), substr($s,-14,2)));
$d = $mtime;
echo date("$d z", strtotime($d));
20150430 119
那个 '20' 可以不要,加上也没问题
date('z') 表示年份中的第几天(注意1月1日是第0天)
请注意表述规则上的差异
$s = 'Y1320101000000XP1026629512V544930568T6B15151K20000028';
$mtime = strtotime('20'.substr($s,-14,2).'-01-01') + (substr($s,-12,3) * 86400)-1;
echo date('Ymd',$mtime);
$s = 'Y1320101000000XP1026629512V544930568T6B15120K20000028';
$mtime = strtotime('20'.substr($s,-14,2).'-00-00') + (substr($s,-12,3) * 86400);
echo date('Y-m-d',$mtime);//2015-03-30