php://input&是什么意思php://输出，何时需要使用? [英] What is the meaning of php://input & php://output and when it needs to use?

问题描述

php://input&是什么意思php://output以及何时需要使用? 请举例说明.

What is the meaning of php://input & php://output and when it needs to use? Please explain with an example.

推荐答案

这是两个 fopen ， stream_get_contents 等.

These are two of the streams that PHP provides. Streams can be used by functions like fopen, fwrite, stream_get_contents, etc.

php://input是只读流，允许您读取发送给它的请求正文(如上载的文件或POST变量).

php://input is a read-only stream that allows you to read the request body sent to it (like uploaded files or POST variables).

$request_body = stream_get_contents('php://input');

php://output是可写流，已发送到服务器，并将返回给请求您页面的浏览器.

php://output is a writable stream that is sent to the server and will be returned to the browser that requested your page.

$fp = fopen('php://output', 'w');
fwrite($fp, 'Hello World!'); //User will see Hello World!
fclose($fp);

请注意，如果您在CLI中，则php://output会将数据写入命令行.

Note that if you are in the CLI, php://output will write data to the command line.

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