ถ้าผมต้องการตัดคำแล้วเข้าไปในฟอร์มที่ต้องการจะต้องทำอย่างไรครับ

<?php
if(isset($_FILES['fileupload'])){
	$upload_path = 'uploads/' . time() . '.txt';
	$output_path = 'uploads/output.txt';
	if($_FILES['fileupload']['error'] != 0)
	{
		switch ($_FILES['fileupload']['error'])
		{  
		 	case 1:
				exit('The uploaded file exceeds the upload_max_filesize directive in php.ini.');
				break;
			case 2:
				exit('The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.');
				break;
			case 3:
				exit('The uploaded file was only partially uploaded.');
				break;
			case 4:
				exit('No file was uploaded.');
				break;
			case 6:
				exit('Missing a temporary folder.');
				die();
			case 7:
				exit('Failed to write file to disk.');
				break;
			case 8:
				exit('A PHP extension stopped the file upload.');
				break;
			default:
                exit('Unknown upload error');
                break;
		 }	
	}
	else if($_FILES["fileupload"]['type'] != 'text/plain')
	{
		exit('กรุณาเลือกไฟล์ .txt เท่านั้น');
 	}
	else if(!move_uploaded_file($_FILES["fileupload"]['tmp_name'], $upload_path))
	{
		exit('เกิดข้อผิดพลาดบางประการในการอัปโหลดไฟล์');
	}
	else
	{
		$read = fopen($upload_path, "r");
		if($read){
			$fw = fopen($output_path, 'w');
			while (!feof($read)){
				$line = fgets($read,9999);
				fputs($fw , "<news-article>\r\n");
				fputs($fw , "<category>" . substr($line, 0, strpos($line, ' ')) . "</category>\r\n");
				fputs($fw , "<content>" . substr($line, strpos($line, ' ')) . "</content>\r\n");
				fputs($fw , "</news-article>\r\n");
			}
			fclose($fw);
		}
		fclose($read);
		unlink($upload_path);	
	}
}
?>
<form id="form1" name="form1" enctype="multipart/form-data" method="post" action="">
  <input type="file" name="fileupload" id="fileupload" /><br />
  <input type="submit" name="button" id="button" value="Upload" />
</form>