function convertTrack() {

}

function gpx2igc($gpxFile, $igcFile)

{

$l=file($gpxFile);

for($i=0;$i<count($l);$i++) {

$l[$i]=trim($l[$i]);

}

$lines=implode(" ",$l);

//echo $lines;

//exit;

//<trk><name>the track</name><trkseg>

if( ! preg_match("/<trkseg>(.*)</trkseg>/i",$lines,$matches) ) {

return 0;

}

echo "match<BR>";

echo $matches[1];

$trkseg=explode(" ",trim($matches[1]));

//<trkpt lat="28.0153298404082" lon="86.8629527172877"><ele>5455</ele></trkpt>

if( ! preg_match("/<trkpt *lat=\"(.*)\" *lon=\"(.*)\"><ele>(.*)<\/ele> *<\/trkpt>/i",$trkseg,$matches) ) {

return 0;

}

echo "match<BR>";

echo $matches[1];

echo "#";

echo $matches[1];

}

function kml2igc($filename){

$l=file($filename);

for($i=0;$i<count($l);$i++) {

$l[$i]=trim($l[$i]);

}

$lines=implode(" ",$l);

//echo $lines;

//exit;

if( ! preg_match("/<SecondsFromTimeOfFirstPoint>(.*)<\/SecondsFromTimeOfFirstPoint>/",$lines,$matches) ) {

return 0;

}

// echo "match<BR>";

// echo $matches[1];

$tm=explode(" ",trim($matches[1]));

// echo count($tm).'<br>';

// now search for this

// <FsInfo time_of_first_point="2007-04-05T09:51:50Z"

// hash="2E361EB937B9D7D6C92855F38D37B399B17292AD">

// if( ! preg_match("/<FsInfo *time_of_first_point=\"([^\"]+)\" *hash=\"(.*)\">/i",$lines,$matches) ) {

// return 0;

// }

/*

this is the new format from kml

<FsInfo time_of_first_point="2007-04-22T13:42:06Z"

civl_pilot_id="4" comp_pilot_id="4"

instrument="GPS 72 Software Version 2.30"

downloaded="2007-04-29T12:39:49Z"

hash="80F1FAC5CFFE4B97E202371EF6303BFCF83A6D78">

I'm a zero at the left in regular expressions, then i change a litle to

this one...

*/

if( ! preg_match("/<FsInfo.*time_of_first_point=\"([^\"]+)\".*hash=\"([^\"]+)\">/i",$lines,$matches) ) {

return 0;

}

//echo "match start time<BR>";

// echo $matches[1];

$start_time_str=trim($matches[1]);

$hash_str=trim($matches[2]);

// echo "$start_time_str # $hash_str<BR>";

// now search for this

/* <name>Tracklog</name>

<LineString>

<altitudeMode>absolute</altitudeMode>

<coordinates>

*/

if(! preg_match("/<name>Tracklog<\/name> *<LineString> *<altitudeMode>absolute<\/altitudeMode> *<coordinates>(.*)<\/coordinates>/",$lines,$matches) ) {

return 0;

}

//echo "match coordinates<BR>";

// echo $matches[1];

$coords=explode(" ",trim($matches[1]));

//echo count($coords);

// print_r($coords);

require_once dirname(__FILE__).'/CL_gpsPoint.php';

// now make the igc file

for($i=0;$i<count($coords);$i++){

if ($i==0) {

// igc date-> ddmmyy

// 01234567890123456789

// kml date -> "2007-04-05T09:51:50Z"

$dateStr=substr($start_time_str,8,2).substr($start_time_str,5,2).substr($start_time_str,2,2);

// echo substr($start_time_str,11,2)." ".substr($start_time_str,14,2)." ".substr($start_time_str,17,2);

$startTimeSecs=substr($start_time_str,11,2)*3600+substr($start_time_str,14,2)*60+substr($start_time_str,17,2);

$igc.=

"HFDTE$dateStr\r\n".

// "HFPLTPilot: $user \r\n".

// "HFTZOTimezone:2\r\n".

"HFSITSite:\r\n".

"HPGTYGliderType:\r\n".

"HPGIDGliderID:\r\n".

"HFDTM100DATUM:WGS-1984\r\n".

"HFCIDCOMPETITIONID:\r\n".

"HFCCLCOMPETITIONCLASS:\r\n".

"HFFXA100\r\n".

"HFRHWHARDWAREVERSION:1.00\r\n".

"HFFTYFRTYPE:Convert from GPSDump KML\r\n";

}

// echo $coords[$i].'<BR>';

$thisPoint=new gpsPoint();

list($lon,$lat,$alt)=explode(",",$coords[$i]);

$thisPoint->lat=$lat+0;

$thisPoint->lon=-$lon+0;

$thisPoint->gpsAlt=$alt+0;

$thisPoint->gpsTime=($startTimeSecs+$tm[$i]) %(3600*24);

$igc.=$thisPoint->to_IGC_Record()."\r\n";

}

//echo $igc;

// write the igc to disk

// $igcfilename=substr($filename,0,-3).'igc';

// overwrite the original

$igcfilename=$filename;

if (!$handle = fopen($igcfilename, 'w')) {

print "Cannot open file ($igcfilename)";

return 0;;

}

// Write $somecontent to our opened file.

if (!fwrite($handle, $igc)) {

print "Cannot write to file ($igcfilename)";

return 0;

}

fclose($handle);

return 1;

}