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php时间函数用法分析,php函数用法

本文实例讲述了php时间函数用法。分享给大家供大家参考,具体如下:

php中有unix时间戳的 相关操作函数,使用很方便

time() 返回当前的 Unix 时间戳

microtime -- 返回当前 Unix 时间戳和微秒数

例 1. 用 microtime() 对脚本的运行计时

<&#63;php
/**
* Simple function to replicate PHP 5 behaviour
*/
function microtime_float()
{
  list($usec, $sec) = explode(" ", microtime());
  return ((float)$usec + (float)$sec);
}
$time_start = microtime_float();
// Sleep for a while
usleep(100);
$time_end = microtime_float();
$time = $time_end - $time_start;
echo "Did nothing in $time seconds/n";
&#63;>

mktime()取得一个日期的 Unix 时间戳

int mktime ( [int hour [, int minute [, int second [, int month [, int day [, int year [, int is_dst]]]]]]] )

参数可以从右向左省略,任何省略的参数会被设置成本地日期和时间的当前值

date()格式化一个本地时间/日期

string date ( string format [, int timestamp] )

提示: 自 PHP 5.1 起在 $_SERVER['REQUEST_TIME'] 中保存了发起该请求时刻的时间戳。

strtotime -- 将任何英文文本的日期时间描述解析为 Unix 时间戳

echo strtotime("+1 day"), "/n";
echo strtotime("+1 week"), "/n";

例2. 某个时间的后一天,后一月

strtotime("+1 day ".$day);
strtotime("2008-01-31 +1 month");
strtotime($day." +1 day");

以上形式都正确

PS:本站还提供了一个Unix时间戳转换工具,非常实用,提供给大家参考:

Unix时间戳(timestamp)转换工具:
http://tools.jb51.net/code/unixtime

这里再为大家推荐一款本站的php格式化美化的排版工具,帮助大家在以后的PHP程序设计中进行代码排版:

php代码在线格式化美化工具:

http://tools.jb51.net/code/phpformat

另外,由于php属于C语言风格,因此下面这款工具同样可以实现php代码的格式化:

C语言风格/HTML/CSS/json代码格式化美化工具:
http://tools.jb51.net/code/ccode_html_css_json

更多关于PHP相关内容感兴趣的读者可查看本站专题:《PHP数学运算技巧总结》、《php操作office文档技巧总结(包括word,excel,access,ppt)》、《PHP数组(Array)操作技巧大全》、《php排序算法总结》、《PHP常用遍历算法与技巧总结》、《PHP数据结构与算法教程》、《php程序设计算法总结》、《php正则表达式用法总结》、《PHP运算与运算符用法总结》、《php字符串(string)用法总结》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。

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