<html><body>$str = "Albert Einstein said: 'E=MC²'";echo htmlentities($str, ENT_COMPAT);echo "<br>";echo htmlentities($str, ENT_QUOTES);echo "<br>";echo htmlentities($str, ENT_NOQUOTES);</body><!-- Mirrored from www.w3schools.com/php7/phptryit.asp?filename=tryphp_func_string_htmlentities2 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 14:40:45 GMT --></html>