如果 time 的格式是绝对时间则 now 参数不起作用。如果 time 的格式是相对时间则其所相对的时间由 now 提供，或者如果未提供 now 参数时用当前时间。失败时返回 -1。 <?PHP
echo strtotime ("now"),"\n";
echo strtotime ("10 September 2000"),"\n";
echo strtotime ("+1 day"),"\n";
echo strtotime ("+1 week"),"\n";
echo strtotime ("+1 week 2 days 4 hours 2 seconds"),"\n";
echo strtotime ("next Thursday"),"\n";
echo strtotime ("last Monday"),"\n";
?><?PHP
$str = 'Not Good';
if (($timestamp = strtotime($str)) === -1) {
echo "The string ($str) is bogus";
} else {
echo "$str == ". date('l dS of F Y h:i:s A',$timestamp);
}
?>
这个效果和用mktime()是一样的.