Php hata alıyorum

if($_GET["ip"]){
	$ipver = $_SERVER["REMOTE_ADDR"];
	$file = fopen("veriler.txt","a");
	fwirete($file, $ipver);
	fclose($file);
	exit;
	
}

function ip_log($filename) {
    $ip_f_user = $_SERVER["REMOTE_ADDR"];
    $browser_f_user = $_SERVER["HTTP_USER_AGENT"];
    if (file_exists($filename)) {
        $filedoc = fopen($filename,"a") or die("Log Dosyası Açılamıyor.");
        fwrite($filedoc,"################". $_SERVER['REQUEST_TIME'] ." \nIP => " . $ip_f_user."\n BROWSER => " . $browser_f_user . "\n",FILE_APPEND);
        fclose($filedoc);
    }else {
        file_put_contents($filename,"IP => " . $ip_f_user." BROWSER => " . $browser_f_user . "\n");
    }