使用php://input

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php:// — 存取各种各样的输入/输出流(Accessing various I/O streams).

php://input allows you to read raw data from the request body. In case of POST requests, it preferrable to $HTTP_RAW_POST_DATA as it does not depend on special php.ini directives. Moreover, for those cases where $HTTP_RAW_POST_DATA is not populated by default, it is a potentially less memory intensive alternative to activating always_populate_raw_post_data. php://input is not available with enctype="multipart/form-data"

php://input 允许你从请求页面中读取原生数据。在使用POST请求状态下，它比$HTTP_RAW_POST_DATA更易于使用，因为它不依靠特殊的php.ini指令。php://input对于 enctype="multipart/form-data" 表单数据不可用。

php://output allows you to write to the output buffer mechanism in the same way as print() and echo().

php://output允许你如同用print()和echo()方法一样，向输出缓冲区写入数据。

post_data.html

<html><head><title>test php://input</title></head><body><form method="post" action="getData.php"><fieldset> <legend>please fill in you infomation</legend> <p><label for="userName">User Name: </label><input name="userName" id="userName" type="text" /></p> <p><label for="passWord">passWord: </label><input name="passWord" id="passWord" type="password"/></p> <p><input type="submit" value="Submit" /> </fieldset></form></body></html>

getData.php

<?php$postData=file_get_contents("php://input");echo($postData);echo("<br/>");?>

如果你输入的user name:test,pass word:123456,返回的即是值对数据：userName=test&passWord=123456

把php://input的所有数据存入a.txt怎么做？

<?php$content = file_get_contents("php://input");file_put_contents('a.txt',$content);?>