title: PHP save filled PDF to server from iframe
body: <p>I am developing a PHP employee application section for a client's secure website. They want the potential employee to fill out a W4 fillable PDF and have it emailed to them. I have found some solutions for pulling information from a PHP form and spitting it out to the PDF via PDFTK.</p>
  
  <p>What I am curious about is: Can I achieve the same result by having the user fill out the actual PDF form (maybe in iframe or however) via PHP? or am i stuck developing the W4 in PHP then transferring the submitted values to PDFTK?</p>
  
  <p>I'm just thoroughly confused on this whole process, so any insight or resources are appreciated.</p>