contact form with attachment file for email

Hi,

i need to update a contact page with a upload file input to allow website users to attach a file to contact form data and send it by email to a particular email address.

1. i know how to attache the file to email, but i would like to know if it’s possible to attach the file to email on fly ? i mean without saving the file in the webpage folder ?

2. if no, is there a temp folder where each users can save files or should i use the upload folder for that ? and by the way upload forlder hasn’t permission 777, so how to cope with that ?

3. if it’s possible to send the attached file onfly, how can i do it ? because i was able till now to attach it to email, but with only temp name ?? so how to rename it in order to allow email receiver to see the real filename and extension ?

thx