cant call function from within its class but can otherwise?

Question

hello there. - just can't seem to get a result from a function called in its class...

require_once($_SERVER['DOCUMENT_ROOT']."/youradmin_v2/scripts/php/IPTC.php"); 

class Media{

    function Media() {
        // connects to db
    }

    function getMetaData($mediaID){
        global $select;

        $mediaDB = $select->mediaSelect($mediaID);
        $filePath=$mediaDB['filePath'];

        $itpc =new Image_IPTC($filePath);
        return $itpc->getTag($tag,0)." called?";
    }


function newFileProcessing($file_name){
     global $func;  
    global $select, $insert, $update;   

    $mediaID=$insert->addMedia($file_name, $filetype, $filePathImg,$testI);

    $mediaDB = $select->mediaSelect($mediaID);
    $filePath=$_SERVER['DOCUMENT_ROOT'].$mediaDB['pathToFile'];

    $update->updateQuery('media',"title='".$this->getMetaData($mediaID)."'");   
}

}
 $media = new Media; 

when i use $media->getMetaData($mediaID) on a php page it works? No errors and when its called in the class " called?" is added to the entry so i think its somink to do with the $itpc =new Image_IPTC($filePath) part which can be viewed here;

iptc class

can anyone see what i'm doing wrong?! any pointers appreciated.

best, dan.

Answer 1

$this->getMetaData($mediaID)

is not going to work in the function newFileProcessing($file_name) because it is not a member function of the Media class

if your code looked like this it should work

require_once($_SERVER['DOCUMENT_ROOT']."/youradmin_v2/scripts/php/IPTC.php"); 

class Media{

    function Media() {
        // connects to db
    }

    function getMetaData($mediaID){
        global $select;

        $mediaDB = $select->mediaSelect($mediaID);
        $filePath=$mediaDB['filePath'];

        $itpc =new Image_IPTC($filePath);
        return $itpc->getTag($tag,0)." called?";
    }


    function newFileProcessing($file_name){
      global $func;   
      global $select, $insert, $update;   

      $mediaID=$insert->addMedia($file_name, $filetype, $filePathImg,$testI);

      $mediaDB = $select->mediaSelect($mediaID);
      $filePath=$_SERVER['DOCUMENT_ROOT'].$mediaDB['pathToFile'];

      $update->updateQuery('media',"title='".$this->getMetaData($mediaID)."'");   
   }
}

$media = new Media;