php strtotime 将日间日期转换成时间时间戳

/*
 将日间日期转换成时间时间戳
 strtotime(time,now)参数 描述
 time 规定要解析的时间字符串。
 now 用来计算返回值的时间戳。如果省略该参数，则使用当前时间。
 
   echo strtotime("now"), " ";
 echo strtotime("10 September 2000"), " ";
 echo strtotime("+1 day"), " ";
 echo strtotime("+1 week"), " ";
 echo strtotime("+1 week 2 days 4 hours 2 seconds"), " ";
 echo strtotime("next Thursday"), " ";
 echo strtotime("last Monday"), " ";
 ?>
 
   $str = 'Not Good';
 
 // previous to PHP 5.1.0 you would compare with -1, instead of false
 if (($timestamp = strtotime($str)) === false) {
  echo "The string ($str) is bogus";
 } else {
  echo "$str == " . date('l dS o F Y h:i:s A', $timestamp);
 }
 ?>
 
 再看strtotime实例
*/
 echo strtotime('2010-2-14'),"
";
 echo date('Y-m-d',strtotime('2010-2-14'));
 
 //输出值
 
 1266076800
 2010-02-14
 
 //你应该在strtotime()，你决定什么不能做。例如
 

# on 2/8/2010
date('m/d/y', strtotime('first day')); # 02/01/10
date('m/d/y', strtotime('last day')); # 02/28/10
date('m/d/y', strtotime('last day next month')); # 03/31/10
date('m/d/y', strtotime('last day last month')); # 01/31/10
date('m/d/y', strtotime('2009-12 last day')); # 12/31/09 - this doesn't work if you reverse the order of the year and month
date('m/d/y', strtotime('2009-03 last day')); # 03/31/09
date('m/d/y', strtotime('2009-03')); # 03/01/09
date('m/d/y', strtotime('last day of march 2009')); # 03/31/09
date('m/d/y', strtotime('last day of march')); # 03/31/10
?>