Reading Geotag data from image in php

Like everyone else has said, exif_read_data(); will do it.To go ahead and get all of the data, use these args:

exif_read_data($img, 0, true); // where $img is the path to your image

This function can only read headers from tiffs and jpegs and I'm pretty sure only jpegs may contain geotags. I've written a simple php script for use in the command line and posted it as a gist on github.

Run the script like this: php exif.php

It will echo out an array. Look for the coordinates here:

[GPS] => Array    [GPSLatitudeRef] => N    [GPSLatitude] => Array        [0] => 30/1        [1] => 1589/100        [2] => 0/1    [GPSLongitudeRef] => W    [GPSLongitude] => Array        [0] => 87/1        [1] => 3609/100        [2] => 0/1    [GPSAltitudeRef] =>     [GPSAltitude] => 18289/454    [GPSTimeStamp] => Array    [0] => 20/1    [1] => 22/1    [2] => 2065/1    [GPSImgDirectionRef] => T    [GPSImgDirection] => 34765/689

The Latitude and Longitude arrays contain three values: 0 is for degrees, 1 is for minutes and 2 is for seconds. If you see something like "1589/100" this is equal to 15.89. So for the GPSLongitude array, 3609/100 is equal to 36.09.

Convert the coordinates from degrees-minutes-second form to decimal form here http://www.satsig.net/degrees-minutes-seconds-calculator.htm

If the latitude is South, dont forget to make it negative. If the longitude is west, make that negative. The coodinates from the above data are: 30.26483, -87.6015

Will Coughlin's answer is correct though I formulated a function for quick reference in case someone stumbles upon the same problem.

/** * Returns an array of latitude and longitude from the Image file * @param image $file * @return multitype:number |boolean */function read_gps_location($file){    if (is_file($file)) {        $info = exif_read_data($file);        if (isset($info['GPSLatitude']) && isset($info['GPSLongitude']) &&            isset($info['GPSLatitudeRef']) && isset($info['GPSLongitudeRef']) &&            in_array($info['GPSLatitudeRef'], array('E','W','N','S')) && in_array($info['GPSLongitudeRef'], array('E','W','N','S'))) {            $GPSLatitudeRef  = strtolower(trim($info['GPSLatitudeRef']));            $GPSLongitudeRef = strtolower(trim($info['GPSLongitudeRef']));            $lat_degrees_a = explode('/',$info['GPSLatitude'][0]);            $lat_minutes_a = explode('/',$info['GPSLatitude'][1]);            $lat_seconds_a = explode('/',$info['GPSLatitude'][2]);            $lng_degrees_a = explode('/',$info['GPSLongitude'][0]);            $lng_minutes_a = explode('/',$info['GPSLongitude'][1]);            $lng_seconds_a = explode('/',$info['GPSLongitude'][2]);            $lat_degrees = $lat_degrees_a[0] / $lat_degrees_a[1];            $lat_minutes = $lat_minutes_a[0] / $lat_minutes_a[1];            $lat_seconds = $lat_seconds_a[0] / $lat_seconds_a[1];            $lng_degrees = $lng_degrees_a[0] / $lng_degrees_a[1];            $lng_minutes = $lng_minutes_a[0] / $lng_minutes_a[1];            $lng_seconds = $lng_seconds_a[0] / $lng_seconds_a[1];            $lat = (float) $lat_degrees+((($lat_minutes*60)+($lat_seconds))/3600);            $lng = (float) $lng_degrees+((($lng_minutes*60)+($lng_seconds))/3600);            //If the latitude is South, make it negative.             //If the longitude is west, make it negative            $GPSLatitudeRef  == 's' ? $lat *= -1 : '';            $GPSLongitudeRef == 'w' ? $lng *= -1 : '';            return array(                'lat' => $lat,                'lng' => $lng            );        }               }    return false;}

Hope it helps someone.

Call this function with filename. I testet it and it works prefectly.

Call example:

$fileName='xxxxxx'; //or $fileName='xxxxxxxxx';echo $returned_data = triphoto_getGPS($fileName);

Function:

function triphoto_getGPS($fileName){    //get the EXIF all metadata from Images    $exif = exif_read_data($fileName);    if(isset($exif["GPSLatitudeRef"])) {        $LatM = 1; $LongM = 1;        if($exif["GPSLatitudeRef"] == 'S') {            $LatM = -1;        }        if($exif["GPSLongitudeRef"] == 'W') {            $LongM = -1;        }        //get the GPS data        $gps['LatDegree']=$exif["GPSLatitude"][0];        $gps['LatMinute']=$exif["GPSLatitude"][1];        $gps['LatgSeconds']=$exif["GPSLatitude"][2];        $gps['LongDegree']=$exif["GPSLongitude"][0];        $gps['LongMinute']=$exif["GPSLongitude"][1];        $gps['LongSeconds']=$exif["GPSLongitude"][2];        //convert strings to numbers        foreach($gps as $key => $value){            $pos = strpos($value, '/');            if($pos !== false){                $temp = explode('/',$value);                $gps[$key] = $temp[0] / $temp[1];            }        }        //calculate the decimal degree        $result['latitude']  = $LatM * ($gps['LatDegree'] + ($gps['LatMinute'] / 60) + ($gps['LatgSeconds'] / 3600));        $result['longitude'] = $LongM * ($gps['LongDegree'] + ($gps['LongMinute'] / 60) + ($gps['LongSeconds'] / 3600));        $result['datetime']  = $exif["DateTime"];        return $result;    }}