. * * @category Website * @package Photoshow * @author Thibaud Rohmer * @copyright 2011 Thibaud Rohmer * @license http://www.gnu.org/licenses/ * @link http://github.com/thibaud-rohmer/PhotoShow */ /** * Exif * * Reads the exif of an image and outputs it in a * nice, readable, html format. * * @category Website * @package Photoshow * @author Thibaud Rohmer * @copyright Thibaud Rohmer * @license http://www.gnu.org/licenses/ * @link http://github.com/thibaud-rohmer/PhotoShow */ class Exif implements HTMLObject { /// Conversion array for exif values private $wanted=array(); /// Exif values, nice and clean private $exif=array(); /// Name of the file private $filename; /** * Create Exif class * * @param string $file * @author Thibaud Rohmer */ public function __construct($file=null){ /// No file given if(!isset($file)) return; /// File isn't an image if(is_array($file) || !File::Type($file) || File::Type($file) != "Image"){ return; } /// No right to view if(!Judge::view($file)) return; /// No exif extension installed if (!in_array("exif", get_loaded_extensions())) { $infos['']="Exif extension is not installed on the server"; return; } /// Create wanted table $this->init_wanted(); /// Read exif $raw_exif = @exif_read_data($file); /// Parse exif foreach($this->wanted as $name => $data){ foreach($data as $d){ if(isset($raw_exif[$d])){ $this->exif[$name] = $this->parse_exif($d,$raw_exif); } } } $this->filename = basename($file); } /** * Create wanted array * * @return void * @author Thibaud Rohmer */ private function init_wanted(){ $this->wanted['Name'][] = 'FileName'; $this->wanted['Model'][] = 'Model'; $this->wanted['Make'][] = 'Make'; $this->wanted['Expo'][] = 'ExposureTime'; $this->wanted['Focal Length'][] = 'FocalLength'; $this->wanted['Aperture'][] = 'FNumber'; $this->wanted['ISO'][] = 'ISOSpeedRatings'; $this->wanted['Original Date'][]= 'DateTimeOriginal'; } /** * Display Exif on website * * @return void * @author Thibaud Rohmer */ public function toHTML(){ if($this->exif){ echo '

Exif

'; echo ""; foreach($this->exif as $name=>$value){ echo ""; echo "\n"; } echo "
".htmlentities($name, ENT_QUOTES ,'UTF-8')."".htmlentities($value, ENT_QUOTES ,'UTF-8')."
\n"; echo ""; } } /** * Parse a string referencing a fraction, * and returns the value of the function * * @param string $f * @return void * @author Thibaud Rohmer */ function frac2float($f){ $frac = explode('/',$f); $float = $frac[0]/$frac[1]; return $float; } /** * Create a beautiful fraction * * @param string $f * @return void * @author Thibaud Rohmer */ function nicefrac($a,$b){ return "1/".number_format($b/$a,"1"); } /** * Parse exif data * * @param string $d * @param string $raw_exif * @return void * @author Thibaud Rohmer */ private function parse_exif($d,$raw_exif){ /// Values that don't need to be processed $untouched=array('FileName','Model','Make','ISOSpeedRatings', 'DateTimeOriginal', 'DateTimeDigitized', 'DateTime'); /// If value doesn't need to be processed, return it if(in_array($d,$untouched)) return $raw_exif[$d]; /// Return value $v=0; switch ($d){ case 'ExposureTime': $v = $raw_exif[$d]." s"; break; case 'FocalLength': $v = $this->frac2float($raw_exif[$d])." mm"; break; case 'FNumber': if(($a = number_format($this->frac2float($raw_exif[$d]),"1")) > 0){ $v = "f".$a; }else{ $v='Unknown'; } break; } return $v; } } ?>