<?php

 $src = "t3.jpg";

 $info = getimagesize($src);

 echo "<pre>";

 $type = image_type_to_extension($info[2],false);

 $fun = "imagecreatefrom{$type}";

 $img = $fun($src);

 $font = "msyh.ttc";

 $content = "秦时明月";

 $color = imagecolorallocate($img,255,255,255);

 imagettftext($img,20,0,645,50,$color,$font,$content);

 header("content-type:image/jpg");

 $func = "image{$type}";

 $func($img);

 $func($img,'newimage',$type);

 imagedestroy($img);

?>