php upload

<form enctype="multipart/form-data" action="__URL__" method="POST">
    <input type="hidden" name="MAX_FILE_SIZE" value="30000" />
    Diese Datei hochladen: <input name="userfile" type="file" />
    <input type="submit" value="Send File" />
</form>

<?php
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = 
  strtolower(pathinfo($target_file,PATHINFO_EXTENSION));

// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
  $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
  if($check !== false) {
    echo "File is an image - " . $check["mime"] . ".";

      $uploadOk = 1;
  } else {
    echo "File is not an image.";

      $uploadOk = 0;
  }
}

// Check if file already exists
if (file_exists($target_file)) {

    echo "Sorry, file already exists.";
  $uploadOk = 0;
}


 // Check file size
if ($_FILES["fileToUpload"]["size"] > 500000) {
  echo "Sorry, your file is too large.";
  $uploadOk = 0;

 }

// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
  echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
  $uploadOk = 0;
}

// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
  echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {

    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {

      echo "The file ". htmlspecialchars( basename( $_FILES["fileToUpload"]["name"])). 
  " has been uploaded.";

    } else {
    echo "Sorry, there was an error uploading your file.";

    }
}
?>
 

<?php
   if(isset($_FILES['image'])){
      $errors= array();
      $file_name = $_FILES['image']['name'];
      $file_size =$_FILES['image']['size'];
      $file_tmp =$_FILES['image']['tmp_name'];
      $file_type=$_FILES['image']['type'];
      $file_ext=strtolower(end(explode('.',$_FILES['image']['name'])));
      
      $extensions= array("jpeg","jpg","png");
      
      if(in_array($file_ext,$extensions)=== false){
         $errors[]="extension not allowed, please choose a JPEG or PNG file.";
      }
      
      if($file_size > 2097152){
         $errors[]='File size must be excately 2 MB';
      }
      
      if(empty($errors)==true){
         move_uploaded_file($file_tmp,"images/".$file_name);
         echo "Success";
      }else{
         print_r($errors);
      }
   }
?>

// To change: FILENAME, array with allowed extensions, Max Filesite, Filepath
if(upload("FILENAME", array("jpeg","jpg","png"), 209715, "C:/xampp/htdocs/")){
        echo "Success";
    }


function upload($f_name, $f_ext_allowed, $f_maxsize, $f_path){

      $f_name_2 = $_FILES[$f_name]['name'];
      $f_size  =  $_FILES[$f_name]['size'];
      $f_tmp   =  $_FILES[$f_name]['tmp_name'];
      $f_error =  $_FILES[$f_name]['error'];
      $f_ext   = strtolower(end(explode('.',$f_name_2)));
      $f_rename = $_SESSION['uid'] . "." . $f_ext;

        if($f_error == 0 && in_array($f_ext, $f_ext_allowed) 
        && $f_size < $f_maxsize && mb_strlen($f_name_2, "UTF-8") < 225 
        && preg_match("`^[-0-9A-Z_\.]+$`i", $f_name_2)){
            if(move_uploaded_file($f_tmp, $f_path . $f_name_2){
                return true;
            }else{
                return false;
            }
        }else{
            return false;
        }
}