This is a function that calculates the number of days from January 01, 2000 to a specified day
(end of calculation) date format: YYYY-MM-DD
Calculate the number of days from January 01, 2000 to a day
function Cal_start2end ($end _day, $start _day)
{
$start _day=ereg_replace ("-", "", $start _day);
$end _day=ereg_replace ("-", "", $end _day);
if ($end _day>= $start _day)
{//Due date is greater than start date
if (substr ($end _day,0,4) ==substr ($start _day,0,4))
{
if (Is_int (substr ($end _day,0,4)/4)
$leap _day=29; Leap year
Else
$leap _day=28;
Same year
if (substr ($end _day,4,2) ==substr ($start _day,4,2))
{
The same month
$endday _from_startday= $end _day-$start _day+1;
}
Else
{
Not same month
Switch (substr ($end _day,4,2))
{
Case "01":
$endday _from_newyear=substr ($end _day,6,2) +1;
Break
Case "02":
$endday _from_newyear=substr ($end _day,6,2) +31;
Break
Case "03":
$endday _from_newyear=substr ($end _day,6,2) + $leap _day+31;
Break
Case "04":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*2;
Break
Case "05":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*2+30;
Break
Case "06":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*3+30;
Break
Case "07":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*2+30*2;
Break
Case "08":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*3+30*2;
Break
Case "09":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*5+30*2;
Break
Case "10":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*5+30*3;
Break
Case "11":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*5+30*4;
Break
Case "12":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*5+30*5;
Break
}
$endday _from_startday= $endday _from_newyear;
}
Return ($endday _from_startday);
}
Else
{
Different years!
$differ _year=substr ($end _day,0,4)-substr ($start _day,0,4);
$how _int_4_floor=floor ($differ _year/4) +1; Rounding down
$how _int_4_ceil=ceil ($differ _year/4) +1; Rounding up
if ($how _int_4_floor== $how _int_4_ceil)
$how _leap_year= $how _int_4_floor-1;
Else
$how _leap_year= $how _int_4_floor;
$how _noleap_year= $differ _year-$how _leap_year;
$differ _year2day= $how _noleap_year*365+ $how _leap_year*366;
if (Is_int (substr ($end _day,0,4)/4)
$leap _day=29; Leap year
Else
$leap _day=28;
if (substr ($end _day,4,2) ==substr ($start _day,4,2))
{
The same month
$endday _from_startday= $differ _year2day+ substr ($end _day,4,2);
}
Else
{
Not same month
Switch (substr ($end _day,4,2))
{
Case "01":
$endday _from_newyear=substr ($end _day,6,2) +1;
Break
Case "02":
$endday _from_newyear=substr ($end _day,6,2) +1+31;
Break
Case "03":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31;
Break
Case "04":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*2;
Break
Case "05":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*2+30;
Break
Case "06":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*3+30;
Break
Case "07":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*2+30*2;
Break
Case "08":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*3+30*2;
Break
Case "09":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*5+30*2;
Break
Case "10":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*5+30*3;
Break
Case "11":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*5+30*4;
Break
Case "12":
$endday _from_newyear=substr ($end _day,6,2) +1+ $leap _day+31*5+30*5;
Break
}//end of Switch
$endday _from_startday= $endday _from_newyear+ $differ _year2day;
}//end of not same month
Return ($endday _from_startday);
}//end of year
}//end of $end _day>= $start _day
}//end of function
$start _day= "2000-01-01";
$end _day= "2011-01-01";
echo "You entered:". $end _day. "
\ n ";
$endday _from_startday=cal_start2end ($end _day, $start _day);
echo "The day distance $start_day". $endday _from_startday. "Day";
?>
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The above describes the 2000 Nobel Prize for Literature to calculate the number of days from January 01, 2000 to a specified date, including the 2000 Nobel Prize for Literature, I hope to be interested in PHP tutorial friends helpful.
