！=和！==之间的区别

在我的情况下，应按以下方式使用！=，或更合适的是！==，有什么区别.

In my case should I use != as below, or is !== more appropriate, what is the difference.

private function authenticateApi($ip,$sentKey) {

    $mediaServerIp = '62.80.198.226';
    $mediaServerKey = '45d6ft7y8u8rf';        

    if ($ip != $mediaServerIp ) {
        return false
    }
    elseif ($sentKey != $mediaServerKey ) {
        return false
    }
    else {
        return true;
    }
}

public function setVideoDeletedAction(Request $request)
{
    //Authenticate sender
    if ( $this->authenticateApi($request->server->get("REMOTE_ADDR"),$request->headers->get('keyFile')) != true ) {
       new response("Din IP [$ip] eller nyckel [********] är inte godkänd för denna åtgärd.");
    }