string - PHP quotes inside quotes

Question

Is it possible to put quotes inside quotes?

If so how?

Here is my code:

<?php

    echo '<span onclick="$(this).addClass('selected');"> </span>';

?>

Answer 1

According to php.net

To specify a literal single quote, escape it with a backslash (). 

It means you could have:

<?php
  echo '<span onclick="$(this).addClass('selected');"> </span>';
?>