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