浅谈PHP接收POST数据方式
浅谈PHP接收POST数据方式
本文给大家简单介绍了下php接收post数据的3种方式,并附上了一则简单的示例,有需要的小伙伴可以参考下
通常情况下用户使用浏览器网页表单向服务器post提交数据,我们使用PHP接收用户POST到服务器的数据,并进行适当的处理。但有些情况下,如用户使用客户端软件向服务端php程序发送post数据,而不能用$_POST来识别,那又该如何处理呢?
$_POST方式接收数据
$_POST方式是通过 HTTP POST 方法传递的变量组成的数组,是自动全局变量。如使用$_POST['name']就可以接收到网页表单以及网页异步方式post过来的数据,即$_POST只能接收文档类型为Content-Type: application/x-www-form-urlencoded提交的数据。
$GLOBALS['HTTP_RAW_POST_DATA']方式接收数据
如果用过post过来的数据不是PHP能够识别的文档类型,比如 text/xml 或者 soap 等等,我们可以用$GLOBALS['HTTP_RAW_POST_DATA']来接收。$HTTP_RAW_POST_DATA 变量包含有原始的POST数据。此变量仅在碰到未识别MIME 类型的数据时产生。$HTTP_RAW_POST_DATA 对于enctype="multipart/form-data" 表单数据不可用。也就是说使用$HTTP_RAW_POST_DATA无法接收网页表单post过来的数据。
php://input方式接收数据
如果访问原始 POST 数据的更好方法是 php://input。php://input 允许读取 POST 的原始数据。和 $HTTP_RAW_POST_DATA 比起来,它给内存带来的压力较小,并且不需要任何特殊的php.ini设置,而php://input不能用于 enctype="multipart/form-data"。
例如,用户使用某个客户端应用程序post给服务器一个文件,文件的内容我们不管它,但是我们要把这个文件完整的保存在服务器上,我们可以使用如下代码:
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$input = file_get_contents('php://input'); file_put_contents($original, $input); //$original为服务器上的文件 |
以上代码使用file_get_contents('php://input')接收post数据,然后将数据写入$original文件中,其实可以理解为从客户端上传了一个文件到服务器上,此类应用非常多,尤其是我们PHP开发要与C,C++等应用程序开发进行产品联合开发时会用到。
以下是一个小示例,演示了$_POST,$GLOBALS['HTTP_RAW_POST_DATA']和php://input三种不同方式的接收POST数据处理:
a.html
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post.php
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header("Content-type:text/html;charset=utf-8");
echo '$_POST接收: print_r($_POST); echo ' ';
echo '$GLOBALS[\'HTTP_RAW_POST_DATA\']接收: print_r($GLOBALS['HTTP_RAW_POST_DATA']); echo ' ';
echo 'php://input接收: $data = file_get_contents('php://input'); print_r(urldecode($data)); |
以上所述就是本文的全部内容了,希望大家能够对php接收post数据的3种方式能够有所了解。

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