php读取和保存base64编码的图片内容

 1 <?php
 2 header('Content-type:text/html;charset=utf-8');
 3 //读取图片文件，转换成base64编码格式
 4 $image_file = './4296762_165319032930_2.jpg';
 5 $image_info = getimagesize($image_file);
 6 $base64_image_content = "data:{$image_info['mime']};base64," . chunk_split(base64_encode(file_get_contents($image_file)));
 7   
 8 //保存base64字符串为图片
 9 //匹配出图片的格式
10 if (preg_match('/^(data:s*image/(w+);base64,)/', $base64_image_content, $result)){
11   $type = $result[2];
12   $new_file = "./test.{$type}";
13   if (file_put_contents($new_file, base64_decode(str_replace($result[1], '', $base64_image_content)))){
14     echo '新文件保存成功：', $new_file;
15   }
16   
17 }
18 ?>
19   
20 <img src="<?php echo $base64_image_content;?>" />