Simple PHP Email Sender Script

Hello, I need a very simple php script to send emails. On the front-end, there will be a form with fields: To: (Enter Recipient Email) File: (Attach a file) Backend: We'll pre-define a "From" email address and the content of the email will also be fixed like "Hi, Please find the attached file. Thanks". So basically, just a form to send emails to different people every time front-end with attachments. I'll generously pay $10. If you bid more, it'll be ignored. Choosing asap. Thanks