<?php 
//php读取和保存base64编码的图片内容
header('Content-type:text/html;charset=utf-8'); 
//读取图片文件，转换成base64编码格式
//$image_file = './loading.gif'; 
$image_file = 'http://www.lrxin.com/images/loading.gif'; 
$image_info = getimagesize($image_file); 
$base64_image_content = "data:{$image_info['mime']};base64," . chunk_split(base64_encode(file_get_contents($image_file)));



//保存base64字符串为图片 
//匹配出图片的格式 
if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $result)){ 
	$type = $result[2]; 
	$new_file = "./test.{$type}"; 
	if (file_put_contents($new_file, base64_decode(str_replace($result[1], '', $base64_image_content)))){ 
		echo '新文件保存成功：', $new_file ,'<br/>'; 
	}
}
?>


<img src="<?php echo $base64_image_content;?>" />
<br/>
<textarea style="width:80%; min-height:300px;"><?php echo $base64_image_content;?></textarea>