What code can we use to redirect non-www to www

[johan]

What code can we use to redirect non-www to www on a page that would work. PHP and an ASP VBScript would be useful for anyone on Windows hosting who don’t have access to the server control.

In C it would look something like this:

string url = Request.RawUrl;
if (url.IndexOf("http://www") >= 0)
{
 Response.Redirect(url);
}else
{
 url = "http://www" + url;
 Response.Redirect(url);
}

[vBMechanic]

PHP

if (!preg_match("/^www.example/i",$_SERVER[HTTP_HOST]) ) {
header("HTTP/1.1 301 Moved Permanently");
if (strlen($_SERVER['QUERY_STRING'])>0)
{
header("location:http://www.example.com$PHP_SELF?$_SERVER['QUERY_STRING']");
}
else if ($PHP_SELF=="/index.php")
{
header("location:http://www.example.com/");
}
else
{
header("location:http://www.example.com$PHP_SELF");
}
exit;
}

[SebastianX]

The C code above applied to ASP results in a 302 response, because the method Response.Redirect(location) does that by default. This code (from the top of my head, not tested) should do the trick if you suffer from Windows:

DIM url,server
server = "www.example.com"
' add more if the URI contains a query string:
url = "http://" & server & Request.ServerVariables("URL")
if Request.ServerVariables("SERVER_NAME") <> server then
Response.Status = "301 Moved Permanently"
Response.AddHeader "Location", url
Response.End
end if

If you have a real host, put this in your root's .htaccess file and don't bother with redirects in scripts:

# redirect permanent domain.tld/* to www.domain.tld/*
RewriteEngine On
RewriteCond %{HTTP_HOST}!^www\.example\.com [NC]
RewriteRule (.*) http://www.example.com/$1 [R=301,L]

[johan]

I have both PHP and ASP (VBScript) running off a Windows server with no access to .htaccess

The ASP sites are fixed but with PHP I dont really know at all I keep getting:

Parse error: parse error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING in D:\.....Line 6 (that line 5 in the PHP sample in the above post).

[encyclo]

For the parse error, the above is missingf a semi-colon at the end of the line:

else if ($PHP_SELF=="/index.php")[red];[/red]