title: how to change font family of captcha and give image in background of captcha?
body: <p>how to change font family of captcha and give image in background of captcha please tell me if any one to know about that. The code is below:</p>
  
  <pre><code>&lt;?php 
      session_start();
      $change_time = md5(microtime());
      $get_value = substr($change_time, 0, 6);
      $_SESSION['value'] = $get_value;
      $create_image  = imagecreate(100, 30);
      imagecolorallocate($create_image, 51, 112, 183);
      $text_color  = imagecolorallocate($create_image, 255, 255, 255);
      imagestring($create_image, 50, 15, 7, $get_value, $text_color);
      header('Content:image/jpeg');
      imagejpeg($create_image);
  ?&gt;
  </code></pre>