How do I ensure attribute values containing quotes do not break formatting?

Question

In my database I am storing the title of posts and when I create the links on the page I put the title of the post as the title attribute.

Answer 1

Use htmlspecialchars to output your strings

htmlspecialchars("I don't",ENT_QUOTES); // returns I don't

That will also take care of other HTML characters such as < & > as explained in the manual,

http://php.net/manual/en/function.htmlentities.php