DataUri.class.php

<?php

final class DataUri {

  protected $file;

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

    return $this;
  }

  public function generate() {
    if (file_exists($this->file)) {
      return $this->make_uri();
    } else {
      return false;
    }
  }

  private function make_uri() {
    return 'data:'
            . $this->get_mime()
            . ';base64,'
            . base64_encode(file_get_contents($this->file));
  }

  private function get_mime() {
    $info = new finfo(FILEINFO_MIME);

    return $info->file($this->file);
  }

}