Erreur 500

function modiMod(){
		$bck=new backer();
			$fType='none';
			$fTitre='Editer des images';
				if(is_array($_POST['targets'] and count($_POST['targets'])>=1){
					foreach($_POST['targets'] as $ref){
						$fCorps.="<label for='obj[$ref][]'>Titre:</label><input type='text' name='obj[$ref][]'/><br />\n";
						$fCorps.="<label for='obj[$ref][]'>Format:</label><input type='text' name='obj[$ref][]'/><br />\n";
						$fCorps.="<label for='obj[$ref][]'>Prix:</label><input type='text' name='obj[$ref][]'/><br />\n";
						$fCorps.="<label for='obj[$ref][]'>Année:</label><input type='text' name='obj[$ref][]'/><br />\n";
						$fCorps.="<label for='obj[$ref][]'>Commentaire:</label><input type='text' name='obj[$ref][]'/><br />\n";
					}
				}else{
					$sqlmM="select ref,titre from galerie order by id";
					$querymM=mysql_query($sqlmM) or die(mysql_error());
					$i=1;
						while($one=mysql_fetch_array($querymM)){
							$fCorps.="\t\t\t<label style='width:25em' for='$i'>{$bck->shapeStringOut($one[titre])}</label><input type='checkbox' id='$i' name='targets[]' value='$one[ref]'/><br />\n";
							$i++;
						}
				}
					function mMtraitement(){
						if(is_array($_POST['obj'] and count($_POST['obj'])>=1){
							echo "none";
						}
					}
					
		$bck->formed(mMtraitement(),$fType,$fTitre,$fCorps);
	}