What is the difference between htmlentities() and htmlspecialchars()?

Question

Sorry for simple question, need to clean some queryhome code.

Can someone help me to find out the difference between these three: onclick, onmouseover, onmouseout.

Answer 1

In PHP htmlentities() convert all applicable characters to HTML entities, while htmlspecialchars() convert special character to HTML entities. Htmlspecilachars() convert only single quote, double quote, <, > and ampersand when htmlentities() convert all the types of characters.