如何从图像资源创建base64编码的字符串

取自http://www.php.net/manual/zh/book.image.php#93393

$image = imagecreatefromstring($file);// start bufferingob_start();imagepng($image);$contents =  ob_get_clean();echo "<img src='data:image/png;base64,".base64_enpre($contents)."' />";imagedestroy($image);