<html><body>$str = "Albert Einstein said: 'E=MCІ'";echo htmlentities($str, ENT_COMPAT);echo "<br>";echo htmlentities($str, ENT_QUOTES);echo "<br>";echo htmlentities($str, ENT_NOQUOTES);</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_func_string_htmlentities2 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:51:06 GMT --></html>