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<?
//check for a safe username
function safeuname($name)
{
if (strlen($name) < 2) return FALSE;
return ereg("^[a-z][a-z0-9_]*$", $name);
}
//check for a valid email address
function validEmail ($email)
{
global $error;
//split user and domain
list($user,$domain) = explode("@", $email);
// check for bad characters, and check for zero length user & domain
if(!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$",$email) or !$user or !$domain )
{
$error = 'an invalid email address (syntax)';
return false;
}
// Syntax OK
// Check for an mail server
elseif(!getmxrr($domain,$mx) or !gethostbyname($domain))
{
$error = "no mail servers listed for '$domain'";
return false;
}
else
{
// Email address valid from technical point of view
return true;
}
}
// Find out if a given user has a blog
function blogger ($user) {
global $BlogDB;
$result = $BlogDB->GetAll("select username from users where username='". $user ."'");
if (count($result)>0) return true;
else return false;
}
?>