PHP日期时间加减程序代码详解
今天我们来看在php中计算两个时间之间的时间差.下面我们直接使用了data,strtotime与time三个函数就实现了.有需要的朋友可参考,今天要讲的这个例子,需求是这样的,得知某个日期时间,如:2012-04-25 10:10:00,我要在这个日期时间的基础上加上5个月并返回处理后的日期,结果:2012-04-25 10:10:00 加5个月等于 2012-09-25 10:10:00
结合PHP函数date()与strtotime()两个函数来实现大致也是这个意思,代码如下:
- <?php
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- $a = '2012-04-25 10:10:00';
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- $a_time = strtotime($a);
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- $b_time = strtotime('+5 Month',$a_time);
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- $b = date('Y-m-d H:i:s',$b_time);
- echo '这是加了五个月后的日期'.$b;
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- $b = date('Y-m-d H:i:s',strtotime('+'.$time.' Month',strtotime($a)));
- echo '这是加了五个月后的日期'.$b;
- ?>
常用的计算时间,代码如下:
- <?php
- date_default_timezone_set('PRC');
- echo "今天:",date("Y-m-d",time()),"<br>";
- echo "今天:",date("Y-m-d",strtotime("18 june 2008")),"<br>";
- echo "昨天:",date("Y-m-d",strtotime("-1 day")), "<br>";
- echo "明天:",date("Y-m-d",strtotime("+1 day")), "<br>";
- echo "一周后:",date("Y-m-d",strtotime("+1 week")), "<br>";
- echo "一周零两天四小时两秒后:",date("Y-m-d G:H:s",strtotime("+1 week 2 days 4 hours 2 seconds")), "<br>";
- echo "下个星期四:",date("Y-m-d",strtotime("next Thursday")), "<br>";
- echo "上个周一:".date("Y-m-d",strtotime("last Monday"))."<br>";
- echo "一个月前:".date("Y-m-d",strtotime("last month"))."<br>";
- echo "一个月后:".date("Y-m-d",strtotime("+1 month"))."<br>";
- echo "十年后:".date("Y-m-d",strtotime("+10 year"))."<br>";
- ?>
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这里再看一些日期加减函数,代码如下:
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- function GetWeek($times)
- {
- $res = date('w', strtotime($times));
- if($res==0)
- $res=7;
- return $res;
- }
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- function GetTime($times)
- {
- $res = date('H:i', strtotime($times));
- return $res;
- }
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- function GetMonth($Month,$type='l')
- {
- if(!strcmp($type,'b'))
- $res=date("Y-m-d H:i:s",strtotime("-$Month months"));
- if(!strcmp($type,'l'))
- $res=date("Y-m-d H:i:s",strtotime("+$Month months"));
- return $res;
- }
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- function GetCurrentDateTime()
- {
- $res=date("Y-m-d H:i:s",time());
- return $res;
- }
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- function GetDiffHours($hours,$type='l')
- {
- if(!strcmp($type,'b'))
- $res=date("Y-m-d H:i:s",strtotime("-$hours hour"));
- if(!strcmp($type,'l'))
- $res=date("Y-m-d H:i:s",strtotime("+$hours hour"));
- return $res;
- }
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- function GetDiffMinute($Minute,$type='l')
- {
- if(!strcmp($type,'b'))
- $res=date("Y-m-d H:i:s",strtotime("-$Minute minute"));
- if(!strcmp($type,'l'))
- $res=date("Y-m-d H:i:s",strtotime("+$Minute minute"));
- return $res;
- }
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- function GetDiffSec($sec,$type='l')
- {
- if(!strcmp($type,'b'))
- $res=date("Y-m-d H:i:s",strtotime("-$sec second"));
- if(!strcmp($type,'l'))
- $res=date("Y-m-d H:i:s",strtotime("+$sec second"));
- return $res;
- }
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- function GetDiffWeek($Week,$type='l')
- {
- if(!strcmp($type,'b'))
- $res=date("Y-m-d H:i:s",strtotime("-$Week week"));
- if(!strcmp($type,'l'))
- $res=date("Y-m-d H:i:s",strtotime("+$Week week"));
- return $res;
- }
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- function GetDiffDays($days,$type='l')
- {
- if(!strcmp($type,'b'))
- $res=date("Y-m-d H:i:s",strtotime("-$days day"));
- if(!strcmp($type,'l'))
- $res=date("Y-m-d H:i:s",strtotime("+$days day"));
- return $res;
- }
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- function GetDiffYears($year,$type='l')
- {
- if(!strcmp($type,'b'))
- $res=date("Y-m-d H:i:s",strtotime("-$year year"));
- if(!strcmp($type,'l'))
- $res=date("Y-m-d H:i:s",strtotime("+$year year"));
- return $res;
- }
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