Вернуть картинку php скриптом

<?php
 
Header("Content-type: image/jpeg");
 
$w = $_GET["w"];
$h = $_GET["h"];
 
$file_ext = substr($_GET["name"], -3);
$file_name = substr($_GET["name"], 0, strpos($_GET["name"], $file_ext) - 1);
 
$img_from = "";
 
if (file_exists($_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/" . $_GET["template"] . "/" . $file_name . '_' . $w . '_' . $h . '.' . $file_ext)) {
    $img_from = imagecreatefromjpeg($_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/" . $_GET["template"] . "/" . $file_name . '_' . $w . '_' . $h . '.jpg');
    imageJpeg($img_from, NULL, 100);
} else {
 
    if (file_exists($_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/" . $_GET["template"] . "/" . $_GET["name"])) {
 
        if (strtoupper($file_ext) == "JPG")
            $img_from = imagecreatefromjpeg($_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/" . $_GET["template"] . "/" . $_GET["name"]);
        if (strtoupper($file_ext) == "PNG")
            $img_from = imagecreatefrompng($_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/" . $_GET["template"] . "/" . $_GET["name"]);
        if (strtoupper($file_ext) == "GIF")
            $img_from = imagecreatefromgif($_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/" . $_GET["template"] . "/" . $_GET["name"]);
        if (strtoupper($file_ext) == "BMP")
            $img_from = imagecreatefromwbmp($_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/" . $_GET["template"] . "/" . $_GET["name"]);
    }
    else {
        $img_from = imagecreatefromjpeg($_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/blank.jpg");
    }
 
    $base_scale = imageSX($img_from) / imageSY($img_from);
 
    $tmp_img = imageCreateTrueColor($w, $h);
    $color = imageColorAllocate($tmp_img, 255, 255, 255);
 
    imageFilledRectangle($tmp_img, 0, 0, $w, $h, $color);
 
    $x0 = 0;
    $y0 = 0;
    $x1 = $w;
    $y1 = $h;
 
 
    $tmp_scale = $w / $h;
 
 
    if ($tmp_scale > $base_scale) {
        $conv_scale = $w / imageSX($img_from);
 
        $trimL = imageSY($img_from) * $conv_scale;
 
        $y0 = ($h - $trimL) / 2;
        $y1 = $h - $y0;
    } else {
        $conv_scale = $h / imageSY($img_from);
 
        $trimL = imageSX($img_from) * $conv_scale;
 
        $x0 = ($w - $trimL) / 2;
        $x1 = $w - $x0;
    }
 
    imageCopyResampled($tmp_img, $img_from, $x0, $y0, 0, 0, ($x1 - $x0), ($y1 - $y0), imageSX($img_from), imageSY($img_from)
    );
 
    $nosave = (int) (isset($_REQUEST['nosave'])) ? ($_REQUEST['nosave']) : (0);
    if (!$nosave) {
        imageJpeg($tmp_img, $_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/" . $_GET["template"] . "/" . $file_name . '_' . $w . '_' . $h . '.jpg', 100);
    }
 
    imageJpeg($tmp_img, NULL, 100);
}
?>

if (file_exists($_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/" . $_GET["template"] . "/" . $file_name . '_' . $w . '_' . $h . '.' . $file_ext)) {
 $img_from = imagecreatefromjpeg($_SERVER['DOCUMENT_ROOT'] . "/designcms2/catalog/" . $_GET["template"] . "/" . $file_name . '_' . $w . '_' . $h . '.jpg');
 imageJpeg($img_from, NULL, 100);
}