From: me+php at drbeat dot li Operating system: Debian unstable (sid) PHP version: 4.4.4 PHP Bug Type: EXIF related Bug description: Erroneously uses the GPS version tag to determine byte order of GPS fields
Description: ------------ When reading GPS EXIF tags, PHP seems to use the GPS version tag to determine the byte order of the other GPS tags instead of the byte order indicator from the EXIF header. An image that shows the incorrect behavior is at http://www.drbeat.li/test/testgps.jpg . In this picture, the GPS tag version is stored as the bytes [0, 0, 2, 2] instead of as [2, 2, 0, 0]. exif_read_data() consequently returns wrong fractions for latitude, longitude and altitude. Reproduce code: --------------- if (($exif = @exif_read_data($file, 0, true)) !== false && $exif['GPS']) print_r($exif['GPS']); Expected result: ---------------- Array ( [GPSVersion] => ???? [GPSLatitudeRef] => N [GPSLatitude] => Array ( [0] => 47/1 [1] => 8/1 [2] => 96/25 ) [GPSLongitudeRef] => E [GPSLongitude] => Array ( [0] => 7/1 [1] => 13/1 [2] => 60801/1250 ) [GPSAltitudeRef] => ? [GPSAltitude] => 436/1 ) Actual result: -------------- Array ( [GPSVersion] => ???? [GPSLatitudeRef] => N [GPSLatitude] => Array ( [0] => 196608/3276800 [1] => 65536/2004877312 [2] => 57999413/-1526726656 ) [GPSLongitudeRef] => E [GPSLongitude] => Array ( [0] => 38666275/3080192 [1] => 65536/524288 [2] => 65536/6291456 ) [GPSAltitudeRef] => ? [GPSAltitude] => 1638400/458752 ) -- Edit bug report at http://bugs.php.net/?id=39617&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=39617&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=39617&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=39617&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=39617&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=39617&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=39617&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=39617&r=needscript Try newer version: http://bugs.php.net/fix.php?id=39617&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=39617&r=support Expected behavior: http://bugs.php.net/fix.php?id=39617&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=39617&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=39617&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=39617&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=39617&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=39617&r=dst IIS Stability: http://bugs.php.net/fix.php?id=39617&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=39617&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=39617&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=39617&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=39617&r=mysqlcfg
