<html><body> $x = "Hello world!";$y = 'Hello world!';echo $x;echo "<br>"; echo $y;</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_datatypes_string by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:29:30 GMT --></html>