问在上传时调整图像大小，而不是在上传之后？

EN

function img_resize($target, $newcopy, $w, $h, $ext) {
list($w_orig, $h_orig) = getimagesize($target);
$scale_ratio = $w_orig / $h_orig;
if (($w / $h) > $scale_ratio) {
    $w = $h * $scale_ratio;
} else {
    $h = $w / $scale_ratio;
}
$img = "";
$ext = strtolower($ext);
if ($ext == "gif"){ 
    $img = imagecreatefromgif($target);
} else if($ext =="png"){ 
    $img = imagecreatefrompng($target);
} else { 
    $img = imagecreatefromjpeg($target);
}
$tci = imagecreatetruecolor($w, $h);
// imagecopyresampled(dst_img, src_img, dst_x, dst_y, src_x, src_y, dst_w, 
dst_h, src_w, src_h)
imagecopyresampled($tci, $img, 0, 0, 0, 0, $w, $h, $w_orig, $h_orig);
imagejpeg($tci, $newcopy, 80);
}

 $fileName = $_FILES["image"]["name"]; // The file name
 $target_file = $_FILES["image"]["tmp_name"]; 
 $kaboom = explode(".", $fileName); // Split file name into an array using the dot
 $fileExt = end($kaboom); // Now target the last array element to get the file extension
 $fname = $kaboom[0];
 $exten = strtolower($fileExt);

 $resized_file = "uploads/newimagename.ext"; //need to change this make sure you set the extension and file name correct.. you will want to secure things up way more than this too..
 $wmax = 1500;
 $hmax = 700;
 img_resize($target_file, $resized_file, $wmax, $hmax, $exten);