PHP c2cTools::getFileType方法代码示例

 /**
  * Reads exif data in Image file (if available) and hydrates object with the most important of them.
  * Also reads GPS info if set (for instance with gpscorrelate, a GPX file and a bunch of well-tagged pictures)  
  * see for instance http://freefoote.dview.net/linux_gpscorr.html
  *
  * @param  $filename_with_path
  * @param  $overwrite_geom : if true, then image lon, lat and ele will be overwritten by those taken from the Exif data (if they exist).
  */
 public function populateWithExifDataFrom($filename_with_path, $overwrite_geom = true, $overwrite_datetime = true)
 {
     // here, read eventual lon, lat and elevation in exif tag...
     if (c2cTools::getFileType($filename_with_path) == 'jpg' && ($exif = exif_read_data($filename_with_path))) {
         $lon = '';
         $lat = '';
         if (isset($exif['GPSLatitude']) && isset($exif['GPSLongitude']) && isset($exif['GPSLatitudeRef']) && isset($exif['GPSLongitudeRef']) && $overwrite_geom) {
             if (strtoupper($exif['GPSLongitudeRef']) == "W") {
                 $lon = -1 * self::convertDMSToDecimal($exif['GPSLongitude']);
             } else {
                 $lon = self::convertDMSToDecimal($exif['GPSLongitude']);
             }
             if (strtoupper($exif['GPSLatitudeRef']) == "S") {
                 $lat = -1 * self::convertDMSToDecimal($exif['GPSLatitude']);
             } else {
                 $lat = self::convertDMSToDecimal($exif['GPSLatitude']);
             }
             // some images come with (0,0) coordinates. Skip such cases
             // also skip obviously wrong values (it happens)
             if ($lon != 0 && $lat != 0 && abs($lat) < 90 && abs($lon) < 180) {
                 $this->set('lon', $lon);
                 $this->set('lat', $lat);
             }
         }
         $ele = '';
         if (isset($exif['GPSAltitude']) && isset($exif['GPSAltitudeRef']) && $overwrite_geom) {
             if ($exif['GPSAltitudeRef'] == "1") {
                 $ele = -1 * round(self::frac_to_dec($exif['GPSAltitude']));
             } else {
                 $ele = round(self::frac_to_dec($exif['GPSAltitude']));
             }
             $this->set('elevation', $ele);
         }
         $camera_name = null;
         if (isset($exif['Make']) && strtolower($exif['Make']) != 'canon') {
             $camera_name = $exif['Make'];
         }
         if (isset($exif['Model'])) {
             if (strtolower($exif['Make']) != 'canon') {
                 $camera_name .= ' ' . $exif['Model'];
             } else {
                 $camera_name = $exif['Model'];
             }
         }
         $this->set('camera_name', $camera_name);
         if (isset($exif['DateTimeOriginal']) && $overwrite_datetime) {
             $image_date = str_replace(' ', ':', $exif['DateTimeOriginal']);
             $image_date = explode(':', $image_date);
             $image_date = mktime($image_date[3], $image_date[4], $image_date[5], $image_date[1], $image_date[2], $image_date[0]);
             $this->set('date_time', date('c', $image_date));
         }
         if (isset($exif['ExposureTime'])) {
             $this->set('exposure_time', self::frac_to_dec($exif['ExposureTime']));
         }
         if (isset($exif['FNumber'])) {
             $this->set('fnumber', self::frac_to_dec($exif['FNumber']));
         }
         if (isset($exif['ISOSpeedRatings'])) {
             $iso_speed = is_array($exif['ISOSpeedRatings']) ? $exif['ISOSpeedRatings'][0] : $exif['ISOSpeedRatings'];
             $this->set('iso_speed', $iso_speed);
         }
         if (isset($exif['FocalLength'])) {
             $this->set('focal_length', self::frac_to_dec($exif['FocalLength']));
         }
         c2cTools::log("Image::populateWithExifDataFrom found GPS data in exif tag : {$lon}, {$lat}, {$ele}");
     }
 }

 /**
  * Returns a 3D or 4D WKT 
  */
 protected function getWktFromFileUpload($request)
 {
     $path = sfConfig::get('sf_upload_dir') . DIRECTORY_SEPARATOR . c2cTools::generateUniqueName();
     $status = $request->moveFile('gps_data', $path);
     $type = c2cTools::getFileType($path);
     c2cTools::log("File uploaded to: {$path} with status: {$status} and a file type of: {$type}");
     $finalPath = $path;
     $wkt = NULL;
     // we rename file according to true type
     // FIXME as for now we only accept gpx,
     // this is kinda redundant...
     if ($type) {
         $status = rename($path, "{$path}.{$type}");
         if ($status) {
             $finalPath = $path . '.' . $type;
             c2cTools::log("File renamed: {$finalPath}");
             $wkt = $this->getWktFromFile($finalPath, $type);
             c2cTools::log("wkt computed");
         }
     }
     // we clear temp file :
     unlink($finalPath);
     //c2cTools::log("getWktFromFileUpload has generated this WKT: $wkt");
     return $wkt;
 }

 /**
  * Get file extension from a file path (eg. /tmp/photo.jpg) using file type info.
  *
  * @input string filepath
  * @return string ext
  **/
 public static function detectExtension($filepath)
 {
     return '.' . c2cTools::getFileType($filepath);
 }