怎么去时间差 $daytime=12 //相隔的天数 $datetime=2010-03-04 时间1 怎么取得$datetime前 $daytime 的时间 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 $daytime=12;$datetime="2010-03-04";echo date("Y-m-d", strtotime($datetime) - 86400*12); $daytime=12;$datetime="2010-03-04";echo date("Y-m-d", strtotime($datetime) - 86400*$daytime); $daytime = 12; //相隔的天数$datetime = '2010-03-04';// 时间echo date('Y-m-d', strtotime("-$daytime day $datetime")); //out 2010-02-20 echo date('Y-m-d', strtotime('-12 days 2010-03-04'));看看手册就知道这个函数的强大了. echo date('Y-m-d', strtotime('-12 day 2010-03-04'));看看手册就知道这个函数的强大了. /** * 返回给指定的日期添加天数后的日期 * * @param string $date 被添加的日期 * @param int $addDay 添加的天数 * @return string */function dateAdd($date, $addDay){ $parts = explode(' ', $date); $date = $parts[0]; $time = $parts[1]; $ymd = explode('-', $date); $hms = explode(':', $time); $year = $ymd[0]; $month = $ymd[1]; $day = $ymd[2]; $hour = $hms[0]; $minute = $hms[1]; $second = $hms[2]; $day = $day+$addDay; if($month=='1' || $month=='3' || $month=='5' || $month=='7' || $month=='8' || $month=='10' || $month=='12'){ if($day>31){ $day = $day - 31; $month++; } } if($month=='4' || $month=='6' || $month=='9' || $month=='11'){ if($day>30){ $day = $day - 30; $month++; } } if($month=='2'){ if(checkRun($year)){ //Feb has 29 days in leap year if($day>29){ $day = $day - 29; $month++; } } else{ if($day>28){ $day = $day - 28; $month++; } } } if($month==13){ $month = 1; $year++; } if(strlen($month)==1){$month = "0".$month;} if(strlen($day)==1){$day = "0".$day;} return $year . "-" . $month . "-" . $day;}/** * 验证是否是润年 * * @param int $year 年份 * @return boolean 如果是则返回True,否则返回False */function checkRun($year){ if($year%4==0 && ($year%100!=0 || $year%400==0) ) return true; else return false;}/** * 将时间转化成秒 * @param string $time */function time_to_second($time) { if (is_time($time)) { $array_time = explode(':', $time); return $array_time[0]*3600+$array_time[1]*60+$array_time[2]; } else { return 0; }}/** * 将时间转化为unix时间戳 * * @param string $date * @return int 如果转化成功则返回unix时间戳,否则返回-1 */function format_date_to_unix($date){ $date = trim($date); $regexp = '^([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})( ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2}))?$'; if(ereg($regexp,$date,$regs)){ return mktime($regs[5],$regs[6],$regs[7],$regs[2],$regs[3],$regs[1]); }else{ return -1; }}/** * Calculation of the time the auction closes * @param int $begin unix timestamp * @param int $end unix timestamp * @return string The time the auction closes */function date_between($begin, $end = 0, $between = FALSE){ if ($end === 0) $end = time(); if ($between === FALSE) $between = $begin - $end; if($between < 0) return ''; if ($between < 60) { return $between.'秒'; } else { $second = $between % 60; $between = $between / 60; if ($between < 60) { return (int)$between."分".$second."秒"; } else if($between === 60) { return "1小时"; } else { $minute = $between % 60; $between = ($between - $minute) / 60; if ($between < 24) { $string = (int)$between."小时"; if ($minute > 0) { $string .= $minute."分"; } return $string; } else if($between === 24) { return "1天"; } else { $hour = $between % 24; $between = $between - $hour; $day = $between / 24; $string = (int)$day."天"; if ($hour > 0) { $string .= $hour."小时"; } if ($minute > 0) { $string .= $minute."分"; } return $string; } } }} 跪求 php计划任务相关 急 求救 在 xampp里怎么配置wap开发环境?????? call_user_func_array这个函数 小问题,回答了就结贴。 请教做一个类的问题? 讨论 PHP变量的生命周期,以及unset的必要性 留言板读取出问题了,求指导 apache中端口号问题? php错误提示???在线等!!!!! 如何实现数据库中得for循环嵌套? 请教PHP的头文件包含问题 同志们怎么在自己的网站加上在线支付系统啊?
$daytime=12;
$datetime="2010-03-04";
echo date("Y-m-d", strtotime($datetime) - 86400*12);
$daytime=12;
$datetime="2010-03-04";
echo date("Y-m-d", strtotime($datetime) - 86400*$daytime);
$datetime = '2010-03-04';// 时间
echo date('Y-m-d', strtotime("-$daytime day $datetime")); //out 2010-02-20
看看手册就知道这个函数的强大了.
看看手册就知道这个函数的强大了.
/**
* 返回给指定的日期添加天数后的日期
*
* @param string $date 被添加的日期
* @param int $addDay 添加的天数
* @return string
*/
function dateAdd($date, $addDay){
$parts = explode(' ', $date);
$date = $parts[0];
$time = $parts[1];
$ymd = explode('-', $date);
$hms = explode(':', $time);
$year = $ymd[0];
$month = $ymd[1];
$day = $ymd[2];
$hour = $hms[0];
$minute = $hms[1];
$second = $hms[2];
$day = $day+$addDay;
if($month=='1' || $month=='3' || $month=='5' || $month=='7' || $month=='8' || $month=='10' || $month=='12'){
if($day>31){
$day = $day - 31;
$month++;
}
}
if($month=='4' || $month=='6' || $month=='9' || $month=='11'){
if($day>30){
$day = $day - 30;
$month++;
}
}
if($month=='2'){
if(checkRun($year)){
//Feb has 29 days in leap year
if($day>29){
$day = $day - 29;
$month++;
}
}
else{
if($day>28){
$day = $day - 28;
$month++;
}
}
}
if($month==13){
$month = 1;
$year++;
}
if(strlen($month)==1){$month = "0".$month;}
if(strlen($day)==1){$day = "0".$day;}
return $year . "-" . $month . "-" . $day;
}/**
* 验证是否是润年
*
* @param int $year 年份
* @return boolean 如果是则返回True,否则返回False
*/
function checkRun($year){
if($year%4==0 && ($year%100!=0 || $year%400==0) )
return true;
else
return false;
}/**
* 将时间转化成秒
* @param string $time
*/
function time_to_second($time) {
if (is_time($time)) {
$array_time = explode(':', $time);
return $array_time[0]*3600+$array_time[1]*60+$array_time[2];
} else {
return 0;
}
}/**
* 将时间转化为unix时间戳
*
* @param string $date
* @return int 如果转化成功则返回unix时间戳,否则返回-1
*/
function format_date_to_unix($date){
$date = trim($date);
$regexp = '^([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})( ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2}))?$';
if(ereg($regexp,$date,$regs)){
return mktime($regs[5],$regs[6],$regs[7],$regs[2],$regs[3],$regs[1]);
}else{
return -1;
}
}/**
* Calculation of the time the auction closes
* @param int $begin unix timestamp
* @param int $end unix timestamp
* @return string The time the auction closes
*/
function date_between($begin, $end = 0, $between = FALSE)
{
if ($end === 0) $end = time();
if ($between === FALSE) $between = $begin - $end;
if($between < 0) return '';
if ($between < 60)
{
return $between.'秒';
}
else
{
$second = $between % 60;
$between = $between / 60;
if ($between < 60)
{
return (int)$between."分".$second."秒";
}
else if($between === 60)
{
return "1小时";
}
else
{
$minute = $between % 60;
$between = ($between - $minute) / 60;
if ($between < 24)
{
$string = (int)$between."小时";
if ($minute > 0)
{
$string .= $minute."分";
}
return $string;
}
else if($between === 24)
{
return "1天";
}
else
{
$hour = $between % 24;
$between = $between - $hour;
$day = $between / 24;
$string = (int)$day."天";
if ($hour > 0)
{
$string .= $hour."小时";
}
if ($minute > 0)
{
$string .= $minute."分";
}
return $string;
}
}
}
}