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determine all the dates between a start and end date.

Posted on 2003-10-25
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I am trying to build a form (using PHP) and would like to have a start date (entered as 3 fields - startMonth, startDay, and startYear) and an end date (entered as 3 fields - endMonth, endDay, endYear).
If they pick the same day for both I am ok, but if the end date is  3 days later I have to figure what dates are in between.

Example 12/20/2003 - 12/23/2003, would have 12/20/2003 and 12/21/2003, and 12/22/2003, and 12/23/2003. (4 dates)

I am pretty new to programming, so an example would be helpful.

Thanks
0
Question by:James Stone
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LVL 13

Accepted Solution

lozloz earned 125 total points
ID: 9622234
<?
if(!checkdate(\$_POST["startMonth"],\$_POST["startDay"],\$_POST["startYear"])) {
die("Start date invalid");
}
if(!checkdate(\$_POST["endMonth"],\$_POST["endDay"],\$_POST["endYear"])) {
die("end date invalid");
}
\$startdate = mktime(0,0,0,\$_POST["startMonth"],\$_POST["startDay"],\$_POST["startYear"]);
\$enddate = mktime(0,0,0,\$_POST["endMonth"],\$_POST["endDay"],\$_POST["endYear"]);
if(\$enddate < \$startdate) {
die("End date precedes start date");
}
\$distance = \$enddate - \$startdate;
\$distance = \$distance / 60 / 60 / 24;
\$distance = floor(\$distance);
?>

\$distance should result in the number of days between them, tell me how you get on
0

Author Comment

ID: 9622414
What I was missing was looping it through a mktime statement  x number of  times, finally came to me!

first time I had seen floor function so read up on that.

Thanks for the comment - eventually I will figure this stuff out.

<?

\$distance = \$distance / 60 / 60 / 24;
\$distance = floor(\$distance);
echo \$distance."<p>";

//
// loop through the days
\$range = range (0, \$distance);

foreach (\$range as \$value) {
\$Rangetimestamps = mktime(0,0,0,\$_POST["Startmonth"],(\$_POST["Startday"]+\$value),\$_POST["Startyear"]);
\$RangeDates = date("mdy", \$Rangetimestamps);
//echo \$Rangetimestamps. " and ".\$value."<p>";
echo \$RangeDates."<p>";

}
?>
0

LVL 33

Expert Comment

ID: 9661074
going with lozloz's initial range checking and assignments using mktime, here's another way to loop through the dates which I think might be a little more readable when you come back to do some debugging:

while (\$startdate <= \$enddate)
{
echo date("mdy", \$startdate);
\$startdate = strtotime("+1 day", \$startdate);
}
0

Author Comment

ID: 9662901
Thanks, I am teaching my self php (I've worked with databases for a few years). The less typing the better! It is much easier to read and probably more efficient too.

Just realized I never gave lozloz his points for helping.

james
0

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