Image/video upload processing example

<?php

//       ___                               __      _     _                          _                 _
//      |_ _|_ __ ___   __ _  __ _  ___   / /_   _(_) __| | ___  ___    _   _ _ __ | | ___   __ _  __| |
//       | || '_ ` _ \ / _` |/ _` |/ _ \ / /\ \ / / |/ _` |/ _ \/ _ \  | | | | '_ \| |/ _ \ / _` |/ _` |
//       | || | | | | | (_| | (_| |  __// /  \ V /| | (_| |  __/ (_) | | |_| | |_) | | (_) | (_| | (_| |
//      |___|_| |_| |_|\__,_|\__, |\___/_/ _  \_/ |_|\__,_|\___|\___/   \__,_| .__/|_|\___/ \__,_|\__,_|
//       _ __  _ __ ___   ___|___/ ___ ___(_)_ __   __ _    _____  ____ _ _ _|_|__  _ __ | | ___
//      | '_ \| '__/ _ \ / __/ _ \/ __/ __| | '_ \ / _` |  / _ \ \/ / _` | '_ ` _ \| '_ \| |/ _ \
//      | |_) | | | (_) | (_|  __/\__ \__ \ | | | | (_| | |  __/>  < (_| | | | | | | |_) | |  __/
//      | .__/|_|  \___/ \___\___||___/___/_|_| |_|\__, |  \___/_/\_\__,_|_| |_| |_| .__/|_|\___|
//      |_|                                        |___/                           |_|
//                  by Erik Keresztes (fiverr.com/erik_keresztes)

$maxSize = 5000; // max file size in kilobits
$maxUncompressedSize = 1000; // compression treshold

// define allowed file types
$allowedImageMIMETypes = array('image/bmp', 'image/gif', 'image/jpeg', 'image/png', 'image/webp');
$allowedVideoMIMETypes = array('video/mp4', 'video/x-msvideo', 'video/x-ms-wmv', 'video/webm', 'video/mpeg', 'video/3gpp', 'video/3gpp2');

// get file extension
$extension = pathinfo($_FILES['uploadedfile']['name'], PATHINFO_EXTENSION);

// get file size in kilobits
$size = $_FILES["uploadedfile"]["size"] / 1000;

// if file smaller than the max size
if($size < $maxSize)
{
    // if file type is allowed image type
    if(in_array($_FILES["uploadedfile"]["type"], $allowedImageMIMETypes))
    {
        // get dimensions of image
        $imgsize = getimagesize($_FILES["uploadedfile"]["tmp_name"]);
        $dimensions = $imgsize[0] . 'x' . $imgsize[1];

        // get filename of uploaded file
        $originalFileName = pathinfo($_FILES['uploadedfile']['name'], PATHINFO_FILENAME);

        // generate random 40-char filename
        $fileName = implode('', explode('.', substr(uniqid(rand(), true), 0, 40)));

        // get user image folder
        $imageFolder = dirname(__DIR__) . '/img/user';

        // if image is bigger than compression treshold
        if($size > $maxUncompressedSize)
        {
            $compressedFilename = $fileName . '.jpg';

            // compress file with imagemagick
            $imagickOutput = shell_exec("{$imagickConvertPath} '{$_FILES["uploadedfile"]["tmp_name"]}[0]' -define jpeg:extent=300kb -strip -interlace Plane -gaussian-blur 0.05 -resize 200x200 {$imageFolder}/compressed/{$compressedFilename} 2>&1");
            if(!empty($imagickOutput))
            {
                redirect('../error?m=imgerror');
                die();
            }
        }

        // move uncompressed image to user folder
        move_uploaded_file($_FILES["uploadedfile"]["tmp_name"], $imageFolder . '/' . $fileName . '.' . $extension);

        // add file info to database
        mysqli_query($conn, "INSERT INTO files (filename, compressedFilename, originalFilename, fileSize, dimensions) VALUES ('{$fileName}.{$extension}', '{$compressedFilename}', '{$_FILES['uploadedfile']['name']}', {$size}, '{$dimensions}')");

        // get file ID from database
        $fileID = end(mysqli_fetch_array(mysqli_query($conn, "SELECT id FROM files WHERE filename = '{$fileName}.{$extension}'")));
    }
    // if file type is allowed video type
    elseif(in_array($_FILES["uploadedfile"]["type"], $allowedVideoMIMETypes))
    {
        // process video
        include('processvideo.php')
    }
    else
    {
        redirect('../error?m=invalidfile');
    }
}
else
{
    redirect('../error?m=filetoobig');
}

?>