PHP Introductory Training Tutorial time processing in PHP

Time Processing in PHP

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Small compilation of Time processing in PHP:

<?

/**

* Convert to UNIX timestamp

*/

function GetTime ($d) {

if (Is_numeric ($d))

return $d;

else {

if (! is_string ($d)) Return0;

if (Ereg (":", $d)) {

$buf = Split ("+", $d);

$year =split ("[-/]", $buf [0]);

$hour =split (":", $buf [1]);

if (Eregi ("PM", $buf [2]))

$hour [0] + = 12;

Returnmktime ($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 when the specified time interval has been added.

* Inetrval is a string expression that represents the interval to be added, such as minutes or days

* number is a numeric expression that represents the number of time intervals to be added

* Date indicates dates

*

* Interval (time interval string expression) can be any of the following values:

* YYYY year

* Q Quarter Quarter

* M Month months

* Y Day of the Year

* D Day

* W weekday days of the week

* WW Week of the year week

* H Hour hours

* N minute min

* S Second sec

* W, y and D are exactly the same, i.e. add one day to the current date, Q plus 3 months, WW plus 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); 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;

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 a time interval between two dates

* Intervals (time interval string expression) can be any of the following values:

* W Week

* D Day

* H hours

* N Minutes

* s seconds

*/

function DateDiff ($interval, $date 1, $date 2) {

Get the number of seconds between two dates

$timedifference =gettime ($date 2)-gettime ($date 1);

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;

}

?>

<?

Test example

$d 1 = "2002-01-11";

$d 2 =date ("y-m-d", DateAdd ("D", 1, $d));

echo $d 1. " of ". DateDiff ("D", $d 1, $d 2). " Tin Hau is $d2<br> ";

echo $d 1. " 10 days ago was ". Date (" Y-m-d ", DateAdd (" D ", -10, $d 1))." <br> ";

$d 3 = Date ("y/m/d h:i:s");

echo "is now". $d 3. " From 2002/2/12 12:59:59 there is also ". DateDiff (" s ", $d 3," 2002/2/1212:59:59 ")." Seconds <br> ";

?>

PHP Introductory Training Tutorial time processing in PHP