Tryit Editor v2.3

PHP Source:

<!DOCTYPE html>
<html>
<body>

<?php
$str = "Jane & 'Tarzan'";
echo htmlentities($str, ENT_COMPAT);
echo "<br>";
echo htmlentities($str, ENT_QUOTES);
echo "<br>";
echo htmlentities($str, ENT_NOQUOTES);
?>

</body>
</html>