title: How secure is PHP?
body: <p>I am somewhat new to PHP coding and I am aware that malicious users can hack a website if you have not sanitized your PHP code. What I am wondering is whether they need a data entry box (like for file submissions, or user-name/password entry fields)?. </p>
  
  <p>Do commands like "include (header.php)" also need some sort of security or are they innately safe?</p>