data transfer

sorry to bother you. I am a new learner of PHP. I want to just simply transfer a data to next PHP script by using this: <a href=\"editing.php3?idx=34&user=$user&last=$last&text=$text\">$idx</a> But in editing.php3, I used this: <td>idx:</td><td><?php echo "$idx";?></td>. Then just no data for $idx. I copied whole script from somewhere so the script should be no problem. I think it may be relevant to my PHP installation. Because I saw I need to set extension_dir to the fold of php3_*.dlls. But in my php folder, I don't have these files. Why? should I download and where? thank you! Ying