Examples of dynamic web page production technology PHP processing time_PHP tutorial

/**
* 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 year
* q Quarter quarter
* m Month month
* y Day of year Number of year
* d Day
* w Weekday Number of days in a 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"];