<?php
header( "Content-type: image/jpeg");
//$filename=‘1.jpg‘;
//$content=file_get_contents($filename);
//$content = base64_encode($content); // 将二进制信息编码成字符串
//file_put_contents(‘6.txt‘,$content);

$file=‘6.txt‘;
$content=file_get_contents($file);

echo base64_decode($content);//输入图片