Why does the script not process all images?

Question

PHP

Hi friends. There is a script that uploads images to a folder on the server and applies a "watermark".
Tell me why it does not process all the images?

<?php
$allowedExts = array("jpg", "jpeg", "gif", "png");
$pre_extension = explode(".", $_FILES["file"]["name"]);
$extension = end($pre_extension);
if ((($_FILES["file"]["type"] == "image/gif")
  || ($_FILES["file"]["type"] == "image/jpeg")
  || ($_FILES["file"]["type"] == "image/png")
  || ($_FILES["file"]["type"] == "image/pjpeg"))
  && ($_FILES["file"]["size"] < 3000000)
  && in_array($extension, $allowedExts)) {
  if ($_FILES["file"]["error"] > 0) {
    echo "Return Code: " . $_FILES["file"]["error"] . "<br>";
  } else {
    $imageName = $_FILES["file"]["name"];
    $uploaddir = '/newUpload/';
    $uploadfile = getcwd().$uploaddir.basename($_FILES['file']['name']);

    if (move_uploaded_file($_FILES['file']['tmp_name'], $uploadfile)) {
      list($width, $height) = getimagesize('newUpload/'.$imageName);
      if ($_FILES["file"]["type"] == "image/jpeg")
        $img = imageCreateFromJPEG('newUpload/'.$imageName);
      if ($_FILES["file"]["type"] == "image/png")
        $img = imageCreateFromPNG('newUpload/'.$imageName);
      if ($_FILES["file"]["type"] == "image/gif")
        $img = imageCreateFromGIF('newUpload/'.$imageName);

      $img_o = imageCreateTrueColor($width, $height);
      imageCopyResampled($img_o, $img, 0, 0, 0, 0, $width, $height, $width, $height);
      $myCount = $width/1000;

      //настройки для надписи
      $font      = "fonts/jhv68mh7.ttf";
      $imageText = "Текст";
      $angle     = rad2deg(atan2(imageSY($img_o), imageSX($img_o)));
      //Цвета
      $shadow    = imageColorAllocateAlpha($img_o, 0, 0, 0, 50);
      $color     = imageColorAllocateAlpha($img_o, 252, 223, 159, 100);
      imageTtfText($img_o, 100*$myCount, $angle, $width/2+3, $height/2+2, $shadow, $font, $imageText);
      imageTtfText($img_o, 100*$myCount, $angle, $width/2, $height/2, $color, $font, $imageText);

      if (file_exists("newUpload/" . $imageName)) {
        header("Content-type: image/jpeg");
        imageJPEG($img_o);
        imageJPEG($img_o, "newUpload/" . $imageName, 100);
      } else {
        move_uploaded_file($_FILES["file"]["tmp_name"],
        "newUpload/" . $_FILES["file"]["name"]);
        echo "Stored in: " . "newUpload/" . $_FILES["file"]["name"];
      }
    }
  }
} else {
  echo "Invalid file<br />";
  print_r($_FILES);
}
?>

And you can tell how to optimize and protect it :)

Answer 1

Well, for example, there is a file size limit of up to 3,000,000 bytes.