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[3.0] Let the registration form ask whether a username is taken #9486

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Merged
live627 merged 1 commit into from
Aug 11, 2026
Merged

[3.0] Let the registration form ask whether a username is taken #9486

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13 changes: 11 additions & 2 deletions Sources/Actions/Register.php
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Original file line number Diff line number Diff line change
Expand Up @@ -347,9 +347,18 @@ public function show(): void
*/
public function checkUsername(): void
{
// Who are you again?
if (empty($_COOKIE) || empty($_COOKIE[Config::$cookiename]) || empty($_SERVER['HTTP_REFERER']) || stripos($_SERVER['HTTP_REFERER'], Config::$scripturl) !== 0) {
/*
* Who are you again? Somebody with a session, who got here from a page
* of ours. Config::$cookiename is the login cookie, and the person
* filling in the registration form has not got one by definition, so
* asking for it turns everybody this is for away.
*/
if (empty($_COOKIE) || empty($_SERVER['HTTP_REFERER']) || stripos($_SERVER['HTTP_REFERER'], Config::$scripturl) !== 0) {
// And that is the whole answer. Carrying on would send the status
// and then the very thing it was refusing.
Utils::sendHttpStatus(403);

Utils::obExit(false);
}

// This is XML!
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