If i change host name after installation. Do i have some problem? Exampel: I install XOOPS for http://unname.com and after that change name for http://newname.com.
So i understand that i must do some change in mainfile.php...

Yes, you need to change the following in mainfile.php:

XOOPS_ROOT_PATH (this is the physical path to your files on the server - assuming that your server has been changed)

XOOPS_URL (the virtual path to your files - e.g. newname.com)


If you use the "Protector 3" module then you may also need to edit:

XOOPS_TRUST_PATH (again, this is the physical path to your files on the server - assuming that your server has been changed)

and:

the path to modules "pre-check" and "postcheck files" (you will have added these to mainfile.php yourself during installation of the module).

Hope this helps

Copy the mainfile.php of your server and open it up in Dreamweaver or something like that and check and change the code as pointed out below:


// XOOPS Physical Path
// Physical path to your main XOOPS directory WITHOUT trailing slash
// Example: define('XOOPS_ROOT_PATH', 'CHANGE AND OR CHECK THIS');
define('XOOPS_ROOT_PATH', 'CHANGE AND OR CHECK THIS');

// XOOPS Virtual Path (URL)
// Virtual path to your main XOOPS directory WITHOUT trailing slash
// Example: define('XOOPS_URL', 'CHANGE AND OR CHECK THIS');
define('XOOPS_URL', 'CHANGE AND OR CHECK THIS');

define('XOOPS_CHECK_PATH', 1);
// Protect against external scripts execution if safe mode is not enabled
if ( XOOPS_CHECK_PATH && !@ini_get('safe_mode') ) {
if ( function_exists('debug_backtrace') ) {
$xoopsScriptPath = debug_backtrace();
if ( !count($xoopsScriptPath) ) {
die("XOOPS path check: this file cannot be requested directly");
}
$xoopsScriptPath = $xoopsScriptPath[0]['file'];
} else {
$xoopsScriptPath = isset($_SERVER['PATH_TRANSLATED']) ? $_SERVER['PATH_TRANSLATED'] : $_SERVER['SCRIPT_FILENAME'];
}
if ( DIRECTORY_SEPARATOR != '/' ) {
// IIS6 may double the \ chars
$xoopsScriptPath = str_replace( strpos( $xoopsScriptPath, '\\\\', 2 ) ? '\\\\' : DIRECTORY_SEPARATOR, '/', $xoopsScriptPath);
}
if ( strcasecmp( substr($xoopsScriptPath, 0, strlen(XOOPS_ROOT_PATH)), str_replace( DIRECTORY_SEPARATOR, '/', XOOPS_ROOT_PATH)) ) {
exit("XOOPS path check: Script is not inside XOOPS_ROOT_PATH and cannot run.");
}
}

// Database
// Choose the database to be used
define('XOOPS_DB_TYPE', 'CHANGE AND OR CHECK THIS');

// Table Prefix
// This prefix will be added to all new tables created to avoid name conflict in the database. If you are unsure, just use the default 'xoops'.
define('XOOPS_DB_PREFIX', 'CHANGE AND OR CHECK THIS');

// Database Hostname
// Hostname of the database server. If you are unsure, 'localhost' works in most cases.
define('XOOPS_DB_HOST', 'CHANGE AND OR CHECK THIS');

// Database Username
// Your database user account on the host
define('XOOPS_DB_USER', 'CHANGE AND OR CHECK THIS');

// Database Password
// Password for your database user account
define('XOOPS_DB_PASS', 'CHANGE AND OR CHECK THIS');

// Database Name
// The name of database on the host. The installer will attempt to create the database if not exist
define('XOOPS_DB_NAME', 'CHANGE AND OR CHECK THIS');

Sidenote: If you moved to a different server, follow showcase77's indications. If you just changed site name, follow Javesey's.