Genauer gesagt: Screenshot im JPEG Format in die Zip-Datei packen und nach dem Upload automatisch entpacken.

PHP Code:

<?php
$default_ss = $_GET["def"]; //"default.png";
$zipfile = $_GET["zip"];
$ss_name = "screenshot.jpg"; // Screenshot name in zip archive
$zip_ss = $zipfile.".jpg"; // dirname($zipfile)."/".
if ($zipfile){
if (is_file($zipfile)){
if (is_file($zip_ss)){
     header("Location: $zip_ss");
     exit;
     }
else {
$z_a = new ZipArchive();
if ($z_a->open(dirname(__FILE__) . "/".$zipfile)) {
    if ($z_a->getFromName("$ss_name")){
    $screenshotimg = $z_a->getFromName("$ss_name");
    $im = imagecreatefromstring($screenshotimg);
    Imagejpeg($im, $zip_ss, 90);
    imagedestroy($im);
    if (is_file("$zip_ss")){
     header("Location: $zip_ss");
     exit;
    } else {print "screenshot failed!";}
 }
 else {
     header("Location: $default_ss");
     exit;}
  }
 }
}
else {
print "zip archive not found!";}
}

?>

Code in einer Datei, z.B. zip_ss.php, abspeichern.
HTML-Code:

<img src="/zip_ss.php?zip=meine_uploads/datei.zip&def=images/default.png">