function getFlightFromIGC($filename)
{
if (!is_file($filename)) {
DEBUG("IGC", 1, "getFlightFromIGC: File was not found:{$filename}<br>");
return 0;
}
set_time_limit(100);
if ($this->forceBounds) {
$startTime = $this->START_TIME;
$endTime = $this->END_TIME;
}
$this->resetData();
if ($this->forceBounds) {
$this->START_TIME = $startTime;
$this->END_TIME = $endTime;
}
$this->setAllowedParams();
$this->filename = basename($filename);
$this->checkForOLCfile($filename);
$done = 0;
$try_no_takeoff_detection = 0;
$tm1 = time() + 3600 * 24 * 30;
$tm2 = 0;
while (!$done) {
$lines = file($filename);
$linesNum = count($lines);
DEBUG("IGC", 1, "File has total {$linesNum} lines<br>");
$points = 0;
$outputBuffer = "";
// process points
// filter bad ones
$p = 0;
$Brecords = 0;
$getPointsNum = 5;
// + 4 points + this one
for ($i = 0; $i < count($lines) - 10; $i++) {
$pointOK = 1;
$line = trim($lines[$i]);
if (strlen($line) == 0) {
continue;
}
if ($line[0] != 'B') {
continue;
}
/* if ($i>2){
$prevline=trim($lines[$i-1]);
if (!substr_compare($line,$prevline,1,6)) continue;
//throw out Brecords with same time signatures P. Wild 4.11.2012
} */
$Brecords++;
// also check for bad points
// 012345678901234567890123456789
// B1522144902558N00848090EV0058400000
if (strlen($line) < 23 || $line[24] == 'V') {
$lines[$i][1] = 'X';
continue;
}
$neighboors = array();
$nextPointPos = $i;
for ($t1 = 0; $t1 < $getPointsNum; $t1++) {
$thisPoint = new gpsPoint(trim($lines[$nextPointPos]), $this->timezone);
$neighboors[$t1] = $thisPoint;
$nextPointPos = $this->getNextPointPos($lines, $nextPointPos);
}
// got all next points
// find mean values
$mean_speed = 0;
$mean_vario = 0;
for ($t1 = 1; $t1 < $getPointsNum; $t1++) {
// for 4 (5-1) points in a row
// create arrays
$T_distance[$t1] = $neighboors[$t1]->calcDistance($neighboors[$t1 - 1]);
$T_alt[$t1] = $neighboors[$t1]->getAlt();
$T_deltaseconds[$t1] = $neighboors[$t1]->getTime() - $neighboors[$t1 - 1]->getTime();
$T_speed[$t1] = $T_deltaseconds[$t1] ? $T_distance[$t1] * 3.6 / $T_deltaseconds[$t1] : 0.0;
/* in km/h */
if ($T_deltaseconds[$t1]) {
$T_vario[$t1] = ($T_alt[$t1] - $neighboors[$t1 - 1]->getAlt()) / $T_deltaseconds[$t1];
}
$mean_speed += $T_speed[$t1];
$mean_vario += $T_vario[$t1];
}
$mean_speed = $mean_speed / ($getPointsNum - 1);
$mean_vario = ($neighboors[$getPointsNum - 1]->getAlt() - $neighboors[0]->getAlt()) / ($neighboors[$getPointsNum - 1]->getTime() - $neighboors[0]->getTime());
//if ($mean_vario<0) {
// DEBUG("IGC",8,"[$Brecords-$p] mean_vario :$mean_vario <0 <br>");
//}
$data_speed[$i] = $mean_speed;
$data_vario[$i] = $mean_vario;
// $mean_vario = $mean_vario/($getPointsNum-1); // mean vario is wrong
if ($neighboors[0]->getTime() < $tm1) {
$tm1 = $neighboors[0]->getTime();
}
if ($neighboors[0]->getTime() > $tm2) {
$tm2 = $neighboors[0]->getTime();
}
if ($neighboors[0]->getTime() - $neighboors[1]->getTime() > 0) {
// the next point is more than one hour in the past
// echo "#"; $pointOK=0;
}
if ($T_distance[1] < 0.5 && $T_deltaseconds[1] > 2) {
// less than 0.5 m distance
$pointOK = 0;
DEBUG("IGC", 8, "[{$Brecords}-{$p}] Distance <0.5 m <br>");
$REJ_T_distance++;
// we dont go through the other tests
//echo "{$lines[$i]} =>";
$lines[$i][1] = 'X';
//echo "{$lines[$i]}<br>";
continue;
//echo $T_distance[1]."*<br>";
}
if (abs($mean_speed - $T_speed[1]) > 40) {
// diff more than 40 km/h
$pointOK = 0;
$REJ_T_mean_speed++;
DEBUG("IGC", 8, "[{$Brecords}-{$p}] Mean speed > 40 km/h <br>");
//echo "@";
}
//if ( abs ($mean_vario - $T_vario[1] ) > 6 ) { // diff more than 6 m/sec
// $pointOK=0;
//echo "#";
//}
if ($T_deltaseconds[1] == 0) {
$pointOK = 0;
$REJ_T_zero_time_diff++;
DEBUG("IGC", 8, "[{$Brecords}-{$p}] No time Diff<br>");
}
if ($T_alt[1] > $this->maxAllowedHeight) {
$pointOK = 0;
$REJ_max_alt++;
}
if (abs($T_speed[1]) > $this->maxAllowedSpeed) {
$pointOK = 0;
$REJ_max_speed++;
DEBUG("IGC", 8, "[{$Brecords}-{$p}] > " . abs($T_speed[1]) . "km/h max allowed speed<br>");
// echo "S";
}
if (abs($T_vario[1]) > $this->maxAllowedVario) {
$pointOK = 0;
$REJ_max_vario++;
// echo "V";
DEBUG("IGC", 8, "[{$Brecords}-{$p}] > " . abs($T_vario[1]) . "m/sec > max allowed vario<br>");
}
if ($p < 5 && !$try_no_takeoff_detection && !$this->forceBounds) {
// first 5 points need special care
$takeoffMaxSpeed = $this->maxAllowedSpeed * 0.5;
DEBUG("IGC", 8, "[{$Brecords}-{$p}] TAKEOFF sequence SPEED: " . abs($T_speed[1]) . " max:{$takeoffMaxSpeed}<br>");
if (abs($T_speed[1]) > $takeoffMaxSpeed) {
$pointOK = 0;
$REJ_max_speed_start++;
// echo "s";
}
if (abs($T_vario[1]) > $this->maxAllowedVario * 0.4) {
$pointOK = 0;
$REJ_max_vario_start++;
//echo "v";
}
}
if (!$pointOK) {
$lines[$i][1] = 'X';
} else {
$p++;
if ($p == 5) {
DEBUG("IGC", 1, "Passed the strict testing (p=5)<br>");
}
}
}
DEBUG("IGC", 1, "REJ: [{$REJ_T_distance}] <0.5 distance<br>");
DEBUG("IGC", 1, "REJ: [{$REJ_T_zero_time_diff}] zero_time_diff<br>");
DEBUG("IGC", 1, "REJ: [{$REJ_T_mean_speed}] mean_speed diff >40km/h<br>");
DEBUG("IGC", 1, "REJ: [{$REJ_max_alt}] >max_alt<br>");
DEBUG("IGC", 1, "REJ: [{$REJ_max_speed}] >max_speed<br>");
DEBUG("IGC", 1, "REJ: [{$REJ_max_vario}] >max_vario<br>");
DEBUG("IGC", 1, "REJ: [{$REJ_max_speed_start}] >max_speed_start<br>");
DEBUG("IGC", 1, "REJ: [{$REJ_max_vario_start}] >max_vario_start<br>");
DEBUG("IGC", 1, "Found {$p} valid B records out of {$Brecords} total<br>");
if ($p > 0) {
$done = 1;
} else {
if ($Brecords > 0 && $REJ_T_zero_time_diff / $Brecords > 0.9) {
// more than 90% stopped points
$lines = file($filename);
$done = 1;
$garminSpecialCase = 1;
$p = $Brecords;
DEBUG("IGC", 1, "Many Stopped points, it is a Garmin Special Case<br>");
} else {
if (!$try_no_takeoff_detection) {
$try_no_takeoff_detection = 1;
DEBUG("IGC", 1, "Will try no_takeoff_detection<br>");
} else {
$done = 1;
}
}
}
}
// while not done
//
if ($p == 0) {
DEBUG("IGC", 1, "NO VALID POINTS FOUND");
return 0;
// no valid points found
}
$mod = 0;
if ($p > $this->maxPointNum) {
$reduceArray = getReduceArray($p, $this->maxPointNum);
// print_r($recudeArray);
$mod = count($reduceArray);
// $mod= ceil( $p / $this->maxPointNum );
}
DEBUG("IGC", 1, "will use a reduce array of length {$mod}<br>");
$duration = $tm2 - $tm1;
$intervalSecs = round($duration / $p);
// echo "<hr>good points: $p duration:$duration, intervalSecs:$intervalSecs<hr>";
$pointsNeededForTakeoff = 5;
if ($intervalSecs >= 8) {
$pointsNeededForTakeoff = 2;
}
$alreadyInPoints = 0;
$stopReadingPoints = 0;
$this->timezone = 1000;
$day_offset = 0;
$foundNewTrack = 0;
$slow_points = 0;
$slow_points_dt = 0;
$stillOnGround = 1;
$tmpDate = 0;
foreach ($lines as $iii => $line) {
if ($foundNewTrack) {
break;
}
$outputLine = $line;
$line = trim($line);
if (strlen($line) == 0) {
continue;
}
// if (strtoupper(substr($line,0,1)) !="B" ) echo "@$line<BR>";
if (strtoupper(substr($line, 0, 3)) == "OLC") {
continue;
}
// it is an olc file , dont put the OLC... line in to the saned file
if (strtoupper(substr($line, 0, 5)) == "HFDTE" || strtoupper(substr($line, 0, 5)) == "HPDTE") {
// HFDTE170104 OR HPDTE310805
if ($alreadyInPoints && $points > 0) {
if ($prevPoint->gpsTime < 86200) {
// if last good point is > 86200 (200 secs before day change at 86400) we dont treat this as a new track
$stopReadingPoints = 1;
DEBUG("IGC", 1, "[{$points}] {$line}<br>");
DEBUG("IGC", 1, "[{$points}] Found a new track (NEW HFDTE)<br>");
}
} else {
$this->DATE = substr($line, 5, 6);
$yr_last = substr($this->DATE, 4, 2);
// case of YY=0 (1 digit) HFDTE08070
if ($yr_last == "0") {
$yr_last = "00";
}
if ($yr_last > 80) {
$yr = "19" . $yr_last;
} else {
$yr = "20" . $yr_last;
}
$this->DATE = $yr . "-" . substr($this->DATE, 2, 2) . "-" . substr($this->DATE, 0, 2);
$alreadyInPoints = 1;
}
} else {
if (strtoupper(substr($line, 0, 13)) == "HFTZOTIMEZONE") {
// HFTZOTimezone:3 OR HFTZOTimezone:-8
$this->timezone = substr($line, 14) + 0;
// echo $this->timezone."#^^";
} else {
if (strtoupper(substr($line, 2, 13)) == "GTYGLIDERTYPE") {
// HOGTYGLIDERTYPE: Gradient Bliss 26 OR HPGTYGliderType:Gradient Nevada
if (!$this->glider) {
$this->glider = trim(substr($line, 16));
}
// HFGTYGLIDERTYPE
// HOGTYGLIDERTYPE
} else {
if ($line[0] == 'B') {
if ($stopReadingPoints) {
continue;
}
if ($line[1] == 'X') {
DEBUG("IGC", 1, "[{$points}] BAD : {$line}<br>");
continue;
// MARKED BAD from BEFORE
}
if (strlen($line) < 23 || strlen($line) > 100) {
continue;
}
if ($points == 0) {
// first point
// echo "######## first point <br>";
$firstPoint = new gpsPoint($line, $this->timezone);
if ($this->timezone == 1000) {
// no timezone in the file
// echo "calc timezone<br>";
$this->timezone = getUTMtimeOffset($firstPoint->lat, $firstPoint->lon, $this->DATE);
$this->timezone = getTZ($firstPoint->lat, $firstPoint->lon, $this->DATE);
// echo $this->timezone;
$firstPoint->timezone = $this->timezone;
}
$tmpTime = $firstPoint->gpsTime + $this->timezone * 3600;
// Now also check if we are one day minus (for US flights )
if ($tmpTime < 0 && $tmpDate == 0) {
// one day before!
$this->DATE = dates::moveDaysFromDate($this->DATE, -1);
$tmpDate = 1;
}
// take care of day change for timezones in australia/nz etc
if ($tmpTime > 86400 && $tmpDate == 0) {
// UTC date in the igc file needs to be +1
$this->DATE = dates::moveDaysFromDate($this->DATE, 1);
$tmpDate = 1;
}
// sanity checks
if ($firstPoint->getAlt() > $this->maxAllowedHeight) {
continue;
}
// echo "times: ".$firstPoint->gpsTime.", ".$firstPoint->getTime()." start_time: ".$this->START_TIME ."<BR> ";
if ($this->forceBounds && !$this->checkBound($firstPoint->getTime())) {
continue;
}
// not inside time window
//$this->FIRST_POINT=$line;
$this->firstPointTM = $firstPoint->gpsTime;
$this->firstLat = $firstPoint->lat();
$this->firstLon = $firstPoint->lon();
$this->TAKEOFF_ALT = $firstPoint->getAlt();
$this->MIN_ALT = $firstPoint->getAlt();
if (!$this->forceBounds) {
$this->START_TIME = $firstPoint->getTime();
}
$prevPoint = new gpsPoint($line, $this->timezone);
$prevPoint2 = new gpsPoint($line, $this->timezone);
} else {
$lastPoint = new gpsPoint($line, $this->timezone);
$lastPoint->gpsTime += $day_offset;
if ($this->forceBounds && !$this->checkBound($lastPoint->getTime())) {
$lastPoint = $prevPoint;
continue;
// not inside time window
}
$time_diff = $lastPoint->getTime() - $prevPoint->getTime();
$time_diff2 = $lastPoint->getTime() - $prevPoint2->getTime();
// echo "time diff: $time_diff # $line<br>";
if ($time_diff < 0 && $time_diff > -36000) {
// if the time is less than 10 hours in the past we just ignore it
// $day_offset = 86400; // if time seems to have gone backwards, add a day
DEBUG("IGC", 1, "[{$points}] {$line}<br>");
DEBUG("IGC", 1, "[{$points}] Point in the past<br>");
continue;
} else {
if ($time_diff < 0 && $time_diff > -86000) {
// CHANGING DAY , means the flight is at night
$lastPoint = $prevPoint;
$foundNewTrack = 1;
DEBUG("IGC", 1, "[{$points}] {$line}<br>");
DEBUG("IGC", 1, "[{$points}] Flight at night ????<br>");
continue;
} else {
if ($time_diff > $this->max_allowed_time_gap) {
// found time gap
// if we are forceBounds check to see if inside window
if ($this->forceBounds && !$this->checkBound($lastPoint->getTime()) || !$this->forceBounds) {
// if we are still on the ground we dont care about time gap
if (!$stillOnGround) {
// not inside time window OR not checking go ahead
$lastPoint = $prevPoint;
$foundNewTrack = 1;
DEBUG("IGC", 1, "[{$points}] {$line}<br>");
DEBUG("IGC", 1, "[{$points}] Found a new track (Time diff of {$time_diff} secs)<br>");
continue;
}
} else {
// inside the window, forced to continue
}
}
}
}
$this->LAST_POINT = $line;
// compute some things
$tmp = $lastPoint->calcDistance($prevPoint);
$alt = $lastPoint->getAlt();
// GUS begin
$deltaseconds = $lastPoint->getTime() - $prevPoint->getTime();
$speedDeltaSecs = $deltaseconds + ($deltaseconds < -85000 ? 86400 : 0);
$speed = $speedDeltaSecs ? $tmp * 3.6 / $speedDeltaSecs : 0.0;
/* in km/h */
if ($speedDeltaSecs) {
$vario = ($alt - $prevPoint->getAlt()) / $speedDeltaSecs;
}
// GUS end
if (!$garminSpecialCase && !$this->forceBounds) {
if (($fast_points >= $pointsNeededForTakeoff || $fast_points_dt > 30) && $stillOnGround) {
// found 5 flying points or 30 secs
$stillOnGround = 0;
DEBUG("IGC", 1, "[{$points}] {$line}<br>");
DEBUG("IGC", 1, "[{$points}] Found Takeoff <br>");
}
if ($stillOnGround) {
//takeoff scan
// either speed >= 15 or if we already have 2 fast points settle with speed>=10
if ($speed >= 15 || $speed >= 10 && $fast_points >= 2) {
$fast_points++;
$fast_points_dt += $speedDeltaSecs;
DEBUG("IGC", 1, "[{$points}] {$line}<br>");
DEBUG("IGC", 1, "[{$points}] Found a fast speed point <br>");
} else {
// reset takeoff scan
DEBUG("IGC", 1, "[{$points}] {$line}<br>");
DEBUG("IGC", 1, "[{$points}] takeoff scan: speed: {$speed} time_diff: {$time_diff}<br>");
$fast_points = 0;
$fast_points_dt = 0;
}
$points = 0;
continue;
} else {
//landing scan
if ($speed < 5) {
$slow_points++;
$slow_points_dt += $speedDeltaSecs;
DEBUG("IGC", 1, "[{$points}] {$line}<br>");
DEBUG("IGC", 1, "[{$points}] Found a slow speed point (speed, dt)=({$speed},{$speedDeltaSecs})<br>");
} else {
$slow_points = 0;
$slow_points_dt = 0;
}
}
// found landing (5 stopped points and >2mins) or 5 mins (300 secs)
if ($slow_points > $pointsNeededForTakeoff && $slow_points_dt > 180 || $slow_points_dt > 300) {
$foundNewTrack = 1;
DEBUG("IGC", 1, "[{$points}] {$line}<br>");
DEBUG("IGC", 1, "[{$points}] Found a new track /landing <br>");
}
}
// sanity checks
if ($deltaseconds == 0 && !$garminSpecialCase) {
continue;
}
if ($alt > $this->maxAllowedHeight) {
continue;
}
if (abs($speed) > $this->maxAllowedSpeed) {
continue;
}
if (abs($vario) > $this->maxAllowedVario) {
continue;
}
$takeoffDistance = $lastPoint->calcDistance($firstPoint);
if ($takeoffDistance > $this->LINEAR_DISTANCE) {
$this->LINEAR_DISTANCE = $takeoffDistance;
}
if ($time_diff2 > 10) {
$tmp = $lastPoint->calcDistance($prevPoint2);
$alt = $lastPoint->getAlt();
$deltaseconds = $time_diff2;
// GUS begin
$speedDeltaSecs = $deltaseconds + ($deltaseconds < -85000 ? 86400 : 0);
$speed = $speedDeltaSecs ? $tmp * 3.6 / $speedDeltaSecs : 0.0;
/* in km/h */
if ($speedDeltaSecs) {
$vario = ($alt - $prevPoint2->getAlt()) / $speedDeltaSecs;
}
// GUS end
$prevPoint2 = new gpsPoint($line, $this->timezone);
$prevPoint2->gpsTime += $day_offset;
// update maximum speed
if ($speed > $this->MAX_SPEED) {
$this->MAX_SPEED = $speed;
}
$this->MEAN_SPEED += $speed;
$MEAN_SPEED_POINTS++;
// UPDATE MIN-MAX VARIO
if ($vario > $this->MAX_VARIO) {
$this->MAX_VARIO = $vario;
}
if ($vario < $this->MIN_VARIO) {
$this->MIN_VARIO = $vario;
}
}
//$speed=$data_speed[$iii-1]+0;
// $vario=$data_vario[$iii-1]+0;
// UPDATE MIN-MAX ALT
if ($alt > $this->MAX_ALT) {
$this->MAX_ALT = $alt;
}
if ($alt < $this->MIN_ALT) {
$this->MIN_ALT = $alt;
}
// end computing
$prevPoint = new gpsPoint($line, $this->timezone);
$prevPoint->gpsTime += $day_offset;
if ($mod >= 1) {
if ($reduceArray[$points % $mod] == 0) {
$outputLine = "";
}
}
}
$points++;
}
}
}
}
// end else
$outputBuffer .= $outputLine;
}
// end main loop
// echo "<HR>MIN VARIO".$this->MIN_VARIO."<HR>";
//
if ($stillOnGround && $this->LINEAR_DISTANCE < 50) {
DEBUG("IGC", 1, "NO TAKEOFF FOUND: ");
return 0;
// no valid points found
}
$path_igc = dirname($this->getIGCFilename(1));
if (!is_dir($path_igc)) {
makeDir($path_igc, 0755);
}
/*write the full saned file */
$fullSanedFile = '';
foreach ($lines as $line) {
$line = trim($line);
if (strlen($line) == 0) {
continue;
}
if ($line[0] == 'B' && $line[1] == 'X') {
continue;
}
// MARKED BAD from BEFORE
// if ( strlen($line) < 23 || strlen($line) > 100 ) continue;
$fullSanedFile .= $line . "\n";
}
if (!writeFile($this->getIGCFilename(2), $fullSanedFile)) {
echo "Problem writing to file (" . $this->getIGCFilename(2) . ")";
}
DEBUG("IGC", 1, "<HR>" . $this->getIGCFilename(2) . ' size: ' . strlen($fullSanedFile) . "<HR>");
// echo "<HR><HR>". $this->getIGCFilename(2) .strlen($fullSanedFile)."<HR><HR>";
/* done wrting the full saned file */
// write saned IGC file
if (!writeFile($this->getIGCFilename(1), $outputBuffer)) {
echo "Problem writing to file (" . $this->getIGCFilename(1) . ")";
}
// done write saned IGC file
DEBUG("IGC", 1, "<HR>" . $this->getIGCFilename(1) . ' size: ' . strlen($outputBuffer) . "<HR>");
if ($lastPoint) {
$this->lastPointTM = $lastPoint->gpsTime;
$this->lastLon = $lastPoint->lon();
$this->lastLat = $lastPoint->lat();
$this->LANDING_ALT = $lastPoint->getAlt();
$this->END_TIME = $lastPoint->getTime();
} else {
$this->lastPointTM = 0;
$this->lastLon = 0;
$this->lastLat = 0;
$this->LANDING_ALT = 0;
$this->END_TIME = 0;
}
$this->DURATION = $this->END_TIME - $this->START_TIME;
if ($this->DURATION < 0) {
$this->DURATION += 86400;
}
$this->MEAN_SPEED = $this->MEAN_SPEED / $MEAN_SPEED_POINTS;
return 1;
}
function getTZ($lat, $lon, $theDate)
{
global $db, $waypointsTable;
global $CONF_use_date_for_TZ_detection;
// fall back to simple lon method in case of old php (4.4.1)
if (!$CONF_use_date_for_TZ_detection) {
return getUTMtimeOffset($lat, $lon, $theDate);
}
$query = "SELECT lat,lon,ABS({$lat}-lat) as dlat , ABS({$lon}- lon ) as dlon ,countryCode from {$waypointsTable} \n\t\t\t\tWHERE ABS({$lat}-lat) < 1 AND ABS({$lon}- lon ) < 1\n\t\t\t\tORDER BY dlat,dlon ASC";
DEBUG('getTZ', 128, "getTZ: {$query}<BR>");
$res = $db->sql_query($query);
if ($res <= 0) {
DEBUG('getTZ', 128, "getTZ: no waypont near by will try rough method<BR>");
return getUTMtimeOffset($lat, $lon, $theDate);
}
$i = 0;
$minTakeoffDistance = 1000000;
while ($row = mysql_fetch_assoc($res)) {
$i++;
$this_distance = gpsPoint::calc_distance($row["lat"], $row["lon"], $lat, $lon);
DEBUG('getTZ', 128, "getTZ: " . $row["lat"] . " , " . $row["lon"] . " country-> " . $row["countryCode"] . " distance-> {$this_distance} <BR>");
if ($this_distance < $minTakeoffDistance) {
$minTakeoffDistance = $this_distance;
$countryCode = $row["countryCode"];
}
}
if (!$i) {
DEBUG('getTZ', 128, "getTZ: No waypont near by #2. Will try rough method<BR>");
return getUTMtimeOffset($lat, $lon, $theDate);
}
DEBUG('getTZ', 128, "getTZ: Min dist: {$minTakeoffDistance} , country: {$countryCode} <BR>");
if ($minTakeoffDistance > 50000) {
DEBUG('getTZ', 128, "getTZ: Nearest waypoint is too far. Will try rough method<BR>");
return getUTMtimeOffset($lat, $lon, $theDate);
}
// now we will try the getTZoffset()
// make $tm from YYYY-MM-DD
$tm = gmmktime(1, 0, 0, substr($theDate, 5, 2), substr($theDate, 8, 2), substr($theDate, 0, 4));
// this will return good results only for countries that have ONE timezone
// else '' will be returned
require_once dirname(__FILE__) . '/FN_timezones.php';
// $TZone=getTZforCountry($countryCode);
global $Countries2timeZones;
$TZone = $Countries2timeZones[strtoupper($countryCode)];
if (strtoupper($countryCode) == 'AU') {
DEBUG('getTZ', 128, "getTZ: Australia timezones<BR>");
/*
australia
http://www.statoids.com/tau.html
central - west is on 129E
central - east is on
lon > 141E for lat < -26 (S)
lon > 138E for lat > -26 (S)
east - > Australia/Sydney
west
central
*/
if ($lon > -129) {
$TZone = 'Australia/Perth';
} else {
if ($lon > -138 && $lat > -26) {
$TZone = 'Australia/Darwin';
} else {
if ($lon > -141 && $lat < -26) {
$TZone = 'Australia/Adelaide';
} else {
if ($lat > -29) {
$TZone = 'Australia/Brisbane';
} else {
$TZone = 'Australia/Sydney';
}
}
}
}
// South-East
}
if ($TZone == '') {
DEBUG('getTZ', 128, "getTZ: Country {$countryCode} has more than one timezones.. Back to rough method<BR>");
return getUTMtimeOffset($lat, $lon, $theDate);
}
return getTZoffset($TZone, $tm) / 3600;
}