<?php

header('Content-type:text/html;charset=utf-8');

//读取图片文件，转换成base64编码格式

$p_w_picpath_file = './aaa.jpg';

$p_w_picpath_info = getp_w_picpathsize($p_w_picpath_file);

$base64_p_w_picpath_content = "data:{$p_w_picpath_info['mime']};base64," . chunk_split(base64_encode(file_get_contents($p_w_picpath_file)));

//保存base64字符串为图片

//匹配出图片的格式

if (preg_match('/^(data:\s*p_w_picpath\/(\w+);base64,)/', $base64_p_w_picpath_content, $result)){

  $type = $result[2];

  $new_file = "./test.{$type}";

  if (file_put_contents($new_file, base64_decode(str_replace($result[1], '', $base64_p_w_picpath_content)))){

    echo '新文件保存成功：', $new_file;

  }

}

?>

<img src="<?php echo $base64_p_w_picpath_content;?>" />