The file, file_check.php is a tool used to check SMF source files for common errors like files not beginning with the php opening tag <?php and not ending with closing tags ?>, it also checks for files saved as UTF-8 BOM. For more information on BOM, take a look at How do I get rid of a Byte Order Mark
This tool can be used to diagnose forums with issues such as CAPCTHA verification images not showing, quote problems, etc. Simply upload the file to the Forum's root directory (the same directory as SSI.php), and navigate your browser to:
