IMAP PHP

If this question is beyond the scope of this mailing list I apologize, however, please reply with an indication of where this question could be answered. In the process of writting a interface for a web based email system sending attachements appears to be the most difficult aspect. Using an HTML form with fields for subject, body, to address, and attachement I attempt to submit all this data to a php script that will then send the mail. The "file" input type is used for browseing the local file system to select the file to be attached. All works well if the file is a text file. The script found at http://renoir.vill.edu/~ylee/mailfile.txt is working well for this application. It fails, however, when the end user tries to send a file that requires a different mime type. If this script is manually edited using the correct mime type the mail and resulting attachement will be viewed by the reciepant without any problem. This where the delema is exposed. Upon submission of the HTML form, php creates a tmp file in the tmp directory. The file is always named with this convention; php[5 number string][3 letter string] (ie. /tmp/php02307gaa). Once the email is sent this file is destroyed, and a file nsform[some long string]. The resulting nsform**** file contains all the correct information nessary to creat the proper mime headers, hence I assume the original tmp file also contains this informations. My question is how do I parse out the original temp file inorder to get the correct information to build the mime headers. Thank you Markus