Logfile Generator | log.php

<?php
$format     = "csv"; // csv or txt
$datum_zeit = date("d.m.Y H:i:s");
$ip         = $_SERVER["REMOTE_ADDR"];
$myip       = file_get_contents('https://api.ipify.org');
$site       = $_SERVER['REQUEST_URI'];
$browser    = $_SERVER["HTTP_USER_AGENT"];
$referer    = isset($_SERVER["HTTP_REFERER"]) ? $_SERVER["HTTP_REFERER"] : "";
$monate     = array(
    1 => "Januar",
    2 => "Februar",
    3 => "Maerz",
    4 => "April",
    5 => "Mai",
    6 => "Juni",
    7 => "Juli",
    8 => "August",
    9 => "September",
    10 => "Oktober",
    11 => "November",
    12 => "Dezember"
);
$monat      = date("n");
$jahr       = date("Y");
$dateiname  = "logs/Logfile-" . $monate[$monat] . "-". $jahr . "." . $format;
$header     = array(
    "Datum",
    "IP",
    "MyIP",
    "Seite",
    "Browser",
    "Referer"
);
$infos      = array(
    $datum_zeit,
    $ip,
    $myip,
    $site,
    $browser,
    $referer
);
if ($format == "csv") {
    $eintrag = '"' . implode('", "', $infos) . '"';
} else {
    $eintrag = implode("\t", $infos);
}
$write_header = !file_exists($dateiname);
$datei        = fopen($dateiname, "a");
if ($write_header) {
    if ($format == "csv") {
        $header_line = '"' . implode('", "', $header) . '"';
    } else {
        $header_line = implode("\t", $header);
    }
    fputs($datei, $header_line . "\n");
}
fputs($datei, $eintrag . "\n");
fclose($datei);
?>