问这个.php是不是过时了，导致我的页面抛出错误？

EN

<?php
if (!isset($_SESSION['User'])) // we don't want guests to upload maps
{
    header("Location: /account");
    exit(0);
}

    // Handle map file upload
    $errormessage = "";
    if (isset($_FILES['mapfile']) and $_FILES['mapfile']['name'] != "")
    {
        if ($_FILES['mapfile']['error'] != 0 or $_FILES['mapfile']['type'] != "application/octet-stream" or $_FILES['mapfile']['size'] < 1 or $_FILES['mapfile']['size'] > 64000)
        {
            $errormessage = "There was an error with your upload.  Please try again.";
        } else
        {
            $_FILES['mapfile']['name'] = filter_var($_FILES['mapfile']['name'], FILTER_SANITIZE_STRING);
            $_FILES['mapfile']['name'] = str_replace(" ", "_", $_FILES['mapfile']['name']);
            $_FILES['mapfile']['name'] = str_replace("(", "", $_FILES['mapfile']['name']);
            $_FILES['mapfile']['name'] = str_replace(")", "", $_FILES['mapfile']['name']);
            if (strpos($_FILES['mapfile']['name'], "ACG") !== false or preg_filter("/[\d|\w|\.|\-|\(|\)]/i", "", $_FILES['mapfile']['name']) != "" or substr(strtolower($_FILES['mapfile']['name']), -4, 4) != ".map")
            {
                $errormessage = "Invalid map filename.";
            } else
            // if (file_exists("public/maps/".$_FILES['mapfile']['name']))
            // {
            //     $errormessage = "Map filename already exists in filesystem.";
            // } else
            {
                try
                {
                    $map = new Map($_FILES['mapfile']['tmp_name']);
                } catch (Exception $e)
                {
                    $errormessage = "File is not a valid map: ".$e->getMessage();
                }
            }
            if ($errormessage == "")
            {
                $mapquery = DB::selectArray("SELECT * FROM maps WHERE Mapfile='{$_FILES['mapfile']['name']}' LIMIT 1");
                if (sizeof($mapquery) > 0) DB::query("DELETE FROM maps WHERE Mapfile='{$_FILES['mapfile']['name']}' LIMIT 1");

                $newmap = [];
                $newmap['Mapfile'] = $_FILES['mapfile']['name'];
                $newmap['Mapname'] = $map->mapinfo['name'];
                $newmap['Gamemode'] = $map->mapinfo['gamemode'];
                $newmap['DescriptionRaw'] = $map->mapinfo['description'];
                $newmap['Description'] = $map->generateDescription(str_replace(".map", "", $_FILES['mapfile']['name']));
                $newmap['Numteams'] = $map->mapinfo['numteams'];
                $newmap['Mapsize'] = $map->mapinfo['tilecount'];
                $newmap['Flagcount'] = $map->mapinfo['neutralflags'] + $map->mapinfo['greenflags'] + $map->mapinfo['redflags'] + $map->mapinfo['blueflags'] + $map->mapinfo['yellowflags'];
                $newmap['Switchcount'] = $map->mapinfo['switches'];
                $newmap['Turretcount'] = $map->mapinfo['turrets'];
                $newmap['Warpcount'] = $map->mapinfo['warps'];
                $newmap['Views'] = 0;
                $newmap['Downloads'] = 0;
                $newmap['Votes'] = 0;
                $newmap['LastPlayed'] = null;
                if (DB::saveArray("maps", $newmap))
                {
                    if (move_uploaded_file($_FILES['mapfile']['tmp_name'], "public/maps/".$_FILES['mapfile']['name']))
                    {
                        chmod("public/maps/".$_FILES['mapfile']['name'], 0755);
                        imagepng($map->createImage(), "public/maps/images/".str_ireplace(".map",".png",$_FILES['mapfile']['name']));
                        imagepng($map->createCroppedImage(), "public/maps/croppedimages/".str_ireplace(".map",".png",$_FILES['mapfile']['name']));
                        $errormessage = "Map successfully added to database.<br/><br/><a href='/maps/?map={$_FILES['mapfile']['name']}'>{$_FILES['mapfile']['name']}</a> ";

                        function getmaplist()
                        {
                            $maps = [];
                            $mapPaths = glob("public/maps/*.map");
                            foreach ($mapPaths as $map)
                            {
                                $map = basename($map);
                                $maps[$map] = substr($map, 0, -4);
                            }
                            sort($maps, SORT_NATURAL | SORT_FLAG_CASE);
                            return $maps;
                        };

                        Cache::put("list of maps", getmaplist());

                    } else
                    {
                        $errormessage = "Error uploading map file.";
                    }
                } else
                {
                    $errormessage = "Error adding map to database.";
                }
            }
        }
    }
?>


<?php require_once("pages/header.php"); ?>

<div id='mapuploadpage'>
    <form action="/mapupload" method="POST" enctype="multipart/form-data">
        <h1>Upload a Map</h1>
        <input type="hidden" name="MAX_FILE_SIZE" value="64000" />
        <input type="file" name="mapfile" id="mapfile" />
        <input type="submit" name="upload" id="uploadbutton" value="Upload" />
        <div id="uploadmessage"><?php echo $errormessage; ?></div>
    </form>
</div>

<?php require_once("pages/footer.php"); ?>