สอบถามการดักค่า IF หรือ ยังไงดีครับ กรณีแบบนี้ครับผม

<?php 
                    <?php 
                    if($list->filename == NULL): ?>
                    <span><font color="red"><?php echo JText::_('COM_KM_DOWNLOAD_NO_ITEM'); ?></font></span>
					
                    <?php 
                    else: 
                    $excel = array("xlsx","xls");
                    $word = array("doc","docx");
                    $powerpoint = array("ppt","pptx");
                    $pdf = array("pdf");
                    $hash = version_compare(JVERSION, '3.0', 'ge') ? JApplication::getHash($list->attachment_id) : JUtility::getHash($list->attachment_id);
                    $linkdownload = JRoute::_('index.php?option=com_k2&view=item&task=download&id='.$list->attachment_id."_".$hash);
                    $linkimg = JURI::base()."templates/tmpl_treasury/images";
                    $width = 24;
                    $height = 20;
                    // echo $list["filename"];
                      $type = explode(".",$list->filename);
                      if(in_array($type[1],$excel)<> ""){
                        echo "<a href='".$linkdownload."' title='".$attachment->title."'><img width=".$width." src='".$linkimg."/icon-excel.png' alt='img'></a>";
                      }
                      else if(in_array($type[1],$word)<> ""){
                        echo "<a href='".$linkdownload."' title='".$attachment->title."'><img width=".$width." src='".$linkimg."/icon-word.png' alt='img'></a>";
                      }
                      else if(in_array($type[1],$powerpoint)<> ""){
                        echo "<a href='".$linkdownload."' title='".$attachment->title."'><img width=".$width." src='".$linkimg."/icon-powerpoint.png' alt='img'></a>";
                      }
                      else if(in_array($type[1],$pdf)<> ""){
                        echo "<a href='".$linkdownload."' title='".$attachment->title."'><img width=".$width." src='".$linkimg."/icon-pdf.png' alt='img'></a>";  
                      }
                      else{
                        echo "<a href='".$linkdownload."' title='".$attachment->title."'><img width=".$width." src='".$linkimg."/icon-etc.png' alt='img'></a>";  
                      }
                    ?>
                    
                    <?php endif; ?> 
					 <?php 
                    if($swtlang == "th"):
                     echo "<span><a href=' ".$linkdownload." '>" .$list->title_name."</a></span>";
					
                    elseif($swtlang == "en"):
                     echo "<span><a href=' ".$linkdownload." '>" .$list->title_name_en."</a></span>";
                    endif;
                     ?>
                      </li>
                     ?>