class Uploader {

public $field;

public function __construct ($field) {
    $this->field = $field;
}

public function isUploaded() {

return isset($_FILES [$this->field]) && (0 == $_FILES [$this->field]['error']);
     }

public function upload() {
    if ( $this->isUploaded() ) {
    move_uploaded_file(
    $_FILES [$this->field]['tmp_name'],
    __DIR__ . '/images/uploaded.jpeg'
    );

    }
}

$image = new Uploader;
$image->isUploaded();
$image->upload();