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<?php
$ifile = @fopen($filename, "r");
if ($ifile == FALSE) exit(error($lang['l_error_cantopen'], $filename));
$nextline = fgets($ifile);
if (trim($nextline) != 'BEGIN:VCALENDAR') exit(error($lang['l_error_invalidcal'], $filename));
// read file in line by line
// XXX end line is skipped because of the 1-line readahead
while (!feof($ifile)) {
$line = $nextline;
$nextline = fgets($ifile, 1024);
$nextline = ereg_replace("[\r\n]", "", $nextline);
#handle continuation lines that start with either a space or a tab (MS Outlook)
while (isset($nextline{0}) && ($nextline{0} == " " || $nextline{0} == "\t")) {
$line = $line . substr($nextline, 1);
$nextline = fgets($ifile, 1024);
$nextline = ereg_replace("[\r\n]", "", $nextline);
}
$line = trim($line);
$is_daylight = false;
$is_std = false;
switch ($line) {
case 'BEGIN:VTIMEZONE':
unset($tz_name, $offset_from, $offset_to, $tz_id);
break;
case 'BEGIN:STANDARD':
unset ($offset_s);
$is_std = true;
$is_daylight = false;
break;
case 'END:STANDARD':
$offset_s = $offset_to;
$is_std = false;
break;
case 'BEGIN:DAYLIGHT':
unset ($offset_d);
$is_daylight = true;
$is_std = false;
break;
case 'END:DAYLIGHT':
$offset_d = $offset_to;
$is_daylight = false;
break;
case 'END:VTIMEZONE':
$tz_array[$tz_id] = array(
0 => $offset_s,
1 => $offset_d,
'dt_start' => $begin_daylight,
'st_start' => $begin_std,
'st_name' => $st_name,
'dt_name' => $dt_name
); #echo "<pre>$tz_id"; print_r($tz_array[$tz_id]);echo"</pre>";
break;
default:
unset ( $data, $prop_pos, $property);
if (ereg ("([^:]+):(.*)", $line, $line)){
$property = $line[1];
$data = $line[2];
$prop_pos = strpos($property,';');
if ($prop_pos !== false) $property = substr($property,0,$prop_pos);
$property = strtoupper($property);
switch ($property) {
case 'TZID':
$tz_id = $data;
break;
case 'TZOFFSETFROM':
$offset_from = $data;
break;
case 'TZOFFSETTO':
$offset_to = $data;
break;
case 'DTSTART':
if($is_std) $begin_std = $data;
if($is_daylight) $begin_daylight = $data;
break;
case 'TZNAME':
if($is_std) $st_name = $data;
if($is_daylight) $dt_name = $data;
break;
}
}
}
}
?>
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