PHP时间函数: strtotime
一. strtotime可转换的格式
<?php $str = "01 Dec 11 14:01"; // 转换成常用的yyyy-mm-dd hh:mi:ss function dateTran($str) { $pos = strrpos($str, ' '); $date = strtotime(substr($str, 0, $pos)); $time = substr($str, $pos); $output = date('Y-m-d', $date).$time; return $output; } $str = "01 Dec 11 14:01"; $o = dateTran($str); var_dump($o); ?>
strtotime()函数可以识别的字符串非常多,下面是PHP手册给出来的例子:
<?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"; ?>
另外, 如果转换失败,返回值为false,可以通过===false来判断是否转换成功!
二. strtotime在32位和64位下的不同返回结果
<?php
$a = strtotime('0000-00-00 00:00:00');
var_dump($a);
?>
在64位系统下,会返回int(-62169955200), 而32位系统会返回bool(false)
官网的手册中给出的解释如下:
strtotime() produces different output on 32 and 64 bit systems running PHP 5.3.3 (as mentioned previously). This affects the "zero date" ("0000-00-00 00:00:00") as well as dates outside the traditional 32 date range.
strtotime("0000-00-00 00:00:00") returns FALSE on a 32 bit system.
strtotime("0000-00-00 00:00:00") returns -62169955200 on a 64 bit system.
-------------我的签名档---------------------
年轻人,还需要多努力!
--------------------------------------------