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Time processing in php_PHP tutorial
- WBOYOriginal
- 2016-07-21 16:07:17715browse
/**
* Convert to UNIX timestamp
*/
function gettime($d) {
if(is_numeric($d))
return $d;
else {
if(! is_string($d)) return 0;
if(ereg(":",$d)) {
$buf = split(" +",$d);
$year = split("[-/]",$buf[0]);
$hour = split(":",$buf[1]);
if(eregi("pm",$buf[2]))
$hour[0] += 12;
return mktime($hour[0],$hour[1],$hour[2],$year[1],$year[2],$year[0]);
}else {
$year = split("[-/]",$d);
return mktime(0,0,0,$year[1],$year[2],$year[0]);
}
}
}
/**
*
* DateAdd(interval,number,date)
* Returns the date to which the specified time interval has been added.
* Inetrval is a string expression representing the time interval to be added, such as minutes or days
* number is a numerical expression representing the number of time intervals to be added
* Date represents the date
*
* Interval (time interval string expression) can be any of the following values:
* yyyy year
* q Quarter
* m Month
* y Day of year Number of year
* d Day
* w Weekday Number of days in week
* ww Week of year Week
* h Hour hour
* n Minute minute
* s Second second
* The functions of w, y and d are exactly the same, that is, add one day to the current date, q adds 3 months, and ww adds 7 days.
*/
function DateAdd($interval, $number, $date) {
$date = gettime($date);
$date_time_array = getdate($date);
$hours = $date_time_array["hours"];
$minutes = $date_time_array["minutes"];
$seconds = $date_time_array["seconds"];
$month = $date_time_array["mon"];
$day = $date_time_array["mday"];
$year = $date_time_array["year"];
switch ($interval) {
case "yyyy": $year +=$number; break;
case "q": $month +=($number*3); break;
case "m": $month +=$number; break;
case "y":
case "d":
case "w": $day+=$number; break;
case "ww": $day+=($number*7); break;
case "h": $hours+=$number; break;
case "n": $minutes+=$number; break;
case "s": $seconds+=$number; break;
}
$timestamp = mktime($hours ,$minutes, $seconds,$month ,$day, $year);
return $timestamp;
}
/**
* DateDiff(interval,date1,date2)
* Returns the time interval between two dates
* intervals (time interval string expression) can be any of the following values:
* w weeks
* d days
* h hours
* n minutes
* s seconds
*/
function DateDiff ($interval, $date1,$date2) {
// 得到两日期之间间隔的秒数
$timedifference = gettime($date2) - gettime($date1);
switch ($interval) {
case "w": $retval = bcdiv($timedifference ,604800); break;
case "d": $retval = bcdiv( $timedifference,86400); break;
case "h": $retval = bcdiv ($timedifference,3600); break;
case "n": $retval = bcdiv( $timedifference,60); break;
case "s": $retval = $timedifference; break;
}
return $retval;
}
?>
// 测试例
$d1 = "2002-01-11";
$d2 = date("Y-m-d",dateadd("d",15,$d1));
echo $d1."的". datediff("d",$d1,$d2)."天后是$d2
";
echo $d1."的10天前是".date("Y-m-d",dateadd("d",-10,$d1))."
";
$d3 = date("Y/m/d H:i:s");
echo "现在是".$d3."距离2002/2/12 12:59:59还有".datediff("s",$d3,"2002/2/12 12:59:59")."秒
";
?>