[PHP] my Datepicker in PHP, please comment :-)

[Oliver Spiesshofer]

# Here is a datepicker that I wrote in PHP. Comments welcome !

# It's supposed to give you an endless calender and a link with the 
# resulting timestamp when a day is clicked. I might add a time-field 
# later. I know the code is not perfect, since I am not :-) If you have 
# suggestions, please post them here. I have been searching for other, 
# ready-made stuff, but could not find any. So I wrote this myself, since 
# I did not want to use any Java etc, only HTML.

# Copy and paste this to a file, name it "datepicker.inc.php" and run it. 
# It works as far as I could

<?php

$timestamp = $_GET['timestamp'];
# this reads the feedback if another year or month is selected.

if (empty($timestamp)) {$timestamp = strtotime("now");}
# if nothing is given, select current time/date

getdatepicker($timestamp, "./index.php?action=editphones", 1);
# call the function

function getdatepicker($month_ts, $linkout, $firstwday)
{
# in: ev. timestamp, link to follow if a day is clicked, 
# and first week of the day for you (0-5, 0 is Sunday)

$weekarray = array
("Su","Mo","Tu","We","Th","Fr","Sa","Su","Mo","Tu","We","Th","Fr","Sa");
        
$datum=getdate($month_ts);
$thatday=$datum[mday];
$thatmonth=date("M", $month_ts);
$thatyear=date("Y", $month_ts);
$firstofmonth_ts=strtotime("1 $thatmonth $thatyear", $month_ts);
$numberofdays=date(t, $month_ts);
$firstmonthday=date(w, $firstofmonth_ts);

$output = "$output<Table border=1>\n";

$nextmonth_ts=strtotime("+1 month", $month_ts);
$lastmonth_ts=strtotime("-1 month", $month_ts);
$nextyear_ts=strtotime("+1 year", $month_ts);
$lastyear_ts=strtotime("-1 year", $month_ts);
$output="$output<TR>\n <TD colspan=7>\n  <Table width=\"100%\">";
$output="$output<TR><TD align=center>\n<A HREF=\"./datepicker.inc.php?
timestamp=$lastmonth_ts\">&lt;</A>";

$output="$output $thatmonth <A HREF=\"./datepicker.inc.php?timestamp=
$nextmonth_ts\">&gt;</A></TD>\n";
$output="$output <TD align=center><A HREF=\"./datepicker.inc.php?
timestamp=$lastyear_ts\">&lt;</A>";
$output="$output $thatyear <A HREF=\"./datepicker.inc.php?timestamp=
$nextyear_ts\">&gt;</A></TD></TR>";
$output="$output </Table>\n</TD></TR>\n\n";
$output="$output<TR>\n";
        
for ($x=$firstwday;$x<=($firstwday+6);$x++) 
{$output = "$output<TD align=center><B>$weekarray[$x]</B></TD>\n";}
                
$output="$output</TR>\n\n<TR>";
$firstweek=true;
for($x=0;$x<$numberofdays;$x++) 
# iterate through all days of the month
        {
        $day_ts=strtotime("+$x day",$firstofmonth_ts);
        $weekday=date("w", $day_ts);
        $day=date("j", $day_ts);
        if ($firstweek==true) {$firstweekgap=$t;}
        if ($weekday==$firstwday)
        #first day of the week new line start
                {
                if ($firstweek==true) {$output2 = "$output2</TR>\n\n";}
                $firstweek=false;
                $t=0; # set first day of week
                $output2 = "$output2<TR>\n";
                }
        $t++; 
        $output2="$output2 <TD align=center><A HREF=\"$linkout?timestamp=
$day_ts\" target=\"tree\">$day</A></TD>\n";
        if ($t==7)
        #last day of the week display
                {$output2="$output2</TR>\n\n";}
        }
$gap=7-$firstweekgap;

if (($gap>0) AND ($gap<7)) 
        {$output="$output\n<TD colspan=\"$gap\"></TD>\n$output2";} 
else 
        {$output="$output$output2";}
        
$output="$output</TR></Table>\n";
echo $output;
}

?>

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