Report Problem with function require() and display in firefox and chrome in PHP Posted June 28, 2014 · Edited June 28, 2014 by thichtomo The code is as following: file:index.php <?php include("fix.php");?> file: fix.php <html> <head> <title></title> <link rel="stylesheet" type="text/css" href="styles/styles.css" /> </head> <body style="margin:0px;"> <h1 style="background-color:red;margin:0px;">Problem</h1> </body></html> When I open file fix.php in firefox and chrome are ok (there is no margin between tag h1 and top boundary of browsers). However, when I open file index.php, in firefox is OK (no margin), but in Chrome, there a margin between them. Please, explain to me the reason. Is it because of the function require () ???