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HomeBackend DevelopmentPHP Tutorial非常全面的php日期时间运算汇总_PHP

实例讲解之前,先来介绍几个核心函数: 
mktime 函数
mktime() 函数返回一个日期的 Unix 时间戳。
参数总是表示 GMT 日期,因此 is_dst 对结果没有影响。
参数可以从右到左依次空着,空着的参数会被设为相应的当前 GMT 值。
语法:mktime(hour,minute,second,month,day,year,is_dst)
参数               描述 
hour       可选。规定小时。 
minute   可选。规定分钟。 
second   可选。规定秒。 
month    可选。规定用数字表示的月。 
day         可选。规定天。 
year        可选。规定年。在某些系统上,合法值介于 1901 - 2038 之间。不过在 PHP 5 中已经不存在这个限制了。 
is_dst  可选。如果时间在日光节约时间(DST)期间,则设置为1,否则设置为0,若未知,则设置为-1。  
自 5.1.0 起,is_dst 参数被废弃。因此应该使用新的时区处理特性。  
例子:mktime() 函数对于日期运算和验证非常有用。它可以自动校正越界的输入:  

<&#63;php 
echo(date("M-d-Y",mktime(0,0,0,12,36,2001))); 
echo(date("M-d-Y",mktime(0,0,0,14,1,2001))); 
echo(date("M-d-Y",mktime(0,0,0,1,1,2001))); 
echo(date("M-d-Y",mktime(0,0,0,1,1,99))); 
&#63;> 

输出:  

Jan-05-2002 
Feb-01-2002 
Jan-01-2001 
Jan-01-1999 

strtotime 函数
strtotime() 函数将任何英文文本的日期时间描述解析为 Unix 时间戳。
语法: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。   
  一周之后:  strtotime("+1 week") ;
  一周之前:  strtotime("-1 week") ;
  一月之后:  strtotime("+1 months") ;
  一天之后:  strtotime("+1 days") ;      
  30秒之后 strtotime( " +30 seconds " );
  20分钟之后 strtotime( " +20 minutes " );
  12个小时之后 strtotime( " +12 hours " );

date 函数
date() 函数格式化一个本地时间/日期。
语法
date(format,timestamp) 
date_default_timezone_set 函数
date_default_timezone_set() 函数设置用在脚本中所有日期/时间函数的默认时区。
date_default_timezone_set(timezone)

实例 

第一种情况是没有数据库,只是得到的日期值进行比较的话,那就得完全用php的时间日期函数计算了,如下:

比如要计算2015-9-5到2015-9-18还有多少天: 

<&#63;php 
$startdate=strtotime("2015-9-5"); 
$enddate=strtotime("2015-9-18"); //上面的php时间日期函数已经把日期变成了时间戳,就是变成了秒。这样只要让两数值相减,然后把秒变成天就可以了,比较的简单,如下: 
$days=round(($enddate-$startdate)/3600/24) ; 
echo $days; //days为得到的天数; 
&#63;> 

第二种 孩子的成长

 <&#63; 
date_default_timezone_set('Asia/Shanghai'); 
//以上一句为设置时区,其实不设也行,但是zde debug的时候会有提示,说什么不安全的函数…添上吧。 
 
echo date('Y-m-d H:i:s').' 今天是'.date('Y').'年的第'.date('W').'周'; 
 
$stime='2005-11-03 10:08'; 
echo "<br/><br/>***自出生(<font color=blue>$stime</font>)以来…:<br/><br/>"; 
echo "今天是第<font color=red><b>".Lnbsp(daysofnow($stime),3)."</b></font>天<br/>"; 
echo "今天是第<font color=red><b>".Lnbsp(weeksofnow($stime),3)."</b></font>周<br/>"; 
echo "今天是第<font color=red><b>".Lnbsp(monthsofnow($stime),3)."</b></font>个月<br/>"; 
echo "今天是第<font color=red><b>".Lnbsp(yearsofnow($stime),3)."</b></font>年<br/>"; 
/* 
$output=sprintf(" 今天是第<font color=red><b>%03d</b></font>天<br/>今天是第< font color=red><b>%03d</b></font>周<br/>今天是第< font color=red><b>%03d</b></font>个月<br/>今天是第< font color=red><b>%03d</b></font>年<br/& gt;",daysofnow($stime),weeksofnow($stime),monthsofnow($stime),yearsofnow($stime)); 
echo $output; 
*/ 
 
function weeksofnow($stime) 
{ 
 $ftime=strtotime($stime); 
 $fweeks=date('w',$ftime); 
 if ($fweeks==0) $fweeks=7; 
 $nweeks=date('w'); 
 if ($nweeks==0) $nweeks=7; 
 $ftemp=strtotime(date('Y-m-d 00:00:00',$ftime))-$fweeks*60*60*24; 
 $ntemp=strtotime(date('Y-m-d 00:00:00',time()))+(7-$nweeks)*60*60*24; 
 //echo date('w',$ftemp)."<br/>....<br/>".date('w',$ntemp)."<br/>"; 
 return ($ntemp-$ftemp)/60/60/24/7; 
} 
 
function daysofnow($stime) 
{ 
 $ftime=strtotime($stime); 
 return ceil(abs((time()-$ftime)/(60*60*24))); 
} 
 
function monthsofnow($stime) 
{ 
 $ftime=strtotime($stime); 
 $fmonth=date('m',$ftime); 
 $fyear=date('Y',$ftime); 
 $nmonth=date('m'); 
 $nyear=date('Y'); 
 $result=($nyear-$fyear)*12+$nmonth-$fmonth+1; 
 return $result; 
} 
 
function yearsofnow($stime) 
{ 
 $ftime=strtotime($stime); 
 $fyear=date('Y',$ftime); 
 $nyear=date('Y'); 
 return $nyear-$fyear+1; 
} 
 
// 下面的函数只是加空格用的,不是核心内容,只为美观 
function Lnbsp($data,$num) 
{ 
 $result=trim($data); 
 for($i=$num;$i>=strlen($data);$i--) { 
 $result=' '.$result; 
 } 
 return $result; 
} 
&#63;> 

第三种 情况:明天,下个月和明年的日期,就可以用以下的代码:

$tomorrow = date('Y-m-d',mktime (0,0,0,date("m"),date("d")+1,date("Y"))); 
$nextmonth = date('Y-m',mktime (0,0,0,date("m")+1,date("d")+1,date("Y"))); 
$nextyear = date('Y',mktime (0,0,0,date("m"),date("d"),date("Y")+1)); 
 
echo $tomorrow.'<br/>'; 
echo $nextmonth.'<br/>'; 
echo $nextyear.'<br/>'; 

第四种情况:工作时间(刨除假日) 

<&#63; 
$startDate="2001-12-12"; 
$endDate="2002-11-1"; 
 
$holidayArr=array("05-01","05-02","10-01","10-01","10-02","10-03","10-04","10-05","01-26","01-27","01-28","01-29"); 
 //假期日期数组,比方国庆,五一,春节等 
$endWeek=2; 
 //周末是否双休.双休为2,仅仅星期天休息为1,没有休息为0 
 
$beginUX=strtotime($startDate); 
$endUX=strtotime($endDate); 
 
for($n=$beginUX;$n<=$endUX;$n=$n+86400){ 
 $week=date("w",$n); 
 $MonDay=date("m-d",$n); 
 if($endWeek){//去处周末休息 
 if($endWeek==2){ 
 if($week==0||$week==6) continue; 
 } 
 if($endWeek==1){ 
 if($week==0) continue; 
 } 
 } 
 if(in_array($MonDay,$holidayArr)) continue; 
 $totalHour+=10;//每天工作10小时 
} 
echo "开始日期:$startDate<BR>"; 
echo "结束日期:$endDate<BR>"; 
echo "共花了".$totalHour."小时"; 
&#63;> 

 
 第五种情况:给出秒算小时

<&#63;php 
function transform($sec){ 
 
 $output = ''; 
 
 $hours = floor($sec / 3600); 
 $remainSeconds = $sec % 3600; 
 
 $minutes = floor($remainSeconds / 60); 
 $seconds = $sec - $hours * 3600 - $minutes * 60; 
 
 if($sec >= 3600){ 
 $output .= $hours.' h / '; 
 $output .= $minutes.' m / '; 
 } 
 
 if($sec >= 60 && $sec < 3600){ 
 $output .= $minutes.' m / '; 
 } 
 
 return $output .= $seconds.' s '; 
} 
 
echo transform(3231803); 
 
&#63;> 

以上就是为大家提供的php日期时间运算全部实例,希望对大家的学习有所帮助。

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