PHP把日期格式化时间戳的方法

<php
function get_format_data($data)
{
$year  = substr($data,0,4);
$month = substr($data,5,2);
$day = substr($data,8,2);
$h = substr($data,11,2);
$i = substr($data,14,2);
$s = substr($data,17,2);
return mktime($h,$i,$s,$month,$data,$year);
}

?>