note 26331 added to function.mktime
| From: | jackybbs at hkstar dot com | Date: | Sat, 26 Oct 2002 20:48:47 +0000 |
| Subject: | note 26331 added to function.mktime | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-38596@lists.php.net to get a copy of this message | ||
for the problem with -1 with processing on year before 1970 in linux & Win, I write a simple
function to calculate the mktime. But the function must input the correct date/time for calculation
and not support auto date correction (eg -1 / 45 in day field).
Hope php can native support mktime then no need to call glibc and user using WIN PHP have no problem
with it.
function is_leaf_year($year) {
$year = year_digit_check($year);
if ($year % 400 == 0) {
return true;
} elseif ($year % 100 == 0 ) {
return false;
} elseif ($year % 4 == 0 ) {
return true;
} else {
return false;
}
}
function year_digit_check ($year) {
if ($year < 100) {
if ($year < 70) {
$year = $year + 2000;
} else {
$year = $year + 1900;
}
}
return $year;
}
function get_gmt_different() {
$result = mktime(0,0,0,1970,1,1);
$result2 = gmmktime(0,0,0,1970,1,1);
return $result - $result2;
}
function my_mktime($hr,$min,$sec,$mon,$day,$year) {
$gmt_different = get_gmt_different();
$hr = intval($hr);
$min = intval($min);
$sec = intval($sec);
$mon = intval($mon);
$day = intval($day);
$year = intval($year);
$year = year_digit_check($year);
$_day_power = 86400;
$_hour_power = 3600;
$_min_power = 60;
$_month_table_normal = array("",31,28,31,30,31,30,31,31,30,31,30,31);
$_month_table_leaf = array("",31,29,31,30,31,30,31,31,30,31,30,31);
$_total_date = 0;
if ($year >= 1970) {
for ($a = 1970 ; $a <= $year; $a++) {
$leaf = is_leaf_year($a);
if ($leaf == true) {
$loop_table = $_month_table_leaf;
$_add_date = 366;
} else {
$loop_table = $_month_table_normal;
$_add_date = 365;
}
if ($a < $year) { $_total_date += $_add_date;
} else {
for($b=1;$b<$mon;$b++) {
$_total_date += $loop_table[$b];
}
}
}
$_total_date +=$day-1;
return $_total_date * $_day_power + $hr * $_hour_power + $min * $_min_power + $sec +
$gmt_different;
} else {
for ($a = 1969 ; $a >= $year; $a--) {
$leaf = is_leaf_year($a);
if ($leaf == true) {
$loop_table = $_month_table_leaf;
$_add_date = 366;
} else {
$loop_table = $_month_table_normal;
$_add_date = 365;
}
if ($a > $year) { $_total_date += $_add_date;
} else {
for($b=12;$b>$mon;$b--) {
$_total_date += $loop_table[$b];
}
}
}
$_total_date += $loop_table[$mon] - $day;
$_day_time = $hr * $_hour_power + $min * $_min_power + $sec;
$_day_time = $_day_power - $_day_time;
return -( $_total_date * $_day_power + $_day_time - $gmt_different);
}
}
--
http://www.php.net/manual/en/function.mktime.php
http://master.php.net/manage/user-notes.php?action=edit+26331
http://master.php.net/manage/user-notes.php?action=delete+26331
http://master.php.net/manage/user-notes.php?action=reject+26331