PHP输入流php://input实例讲解_php技巧
对于php://input介绍,PHP官方手册文档有一段话对它进行了很明确地概述。
“php://input allows you to read raw POST data. It is a less memory intensive alternative to$HTTP_RAW_POST_DATA and does not need any special php.ini directives. php://input is not available with enctype=”multipart/form-data”.
翻译过来,是这样:
“php://input可以读取没有处理过的POST数据。相较于$HTTP_RAW_POST_DATA而言,它给内存带来的压力较小,并且不需要特 殊的php.ini设置。php://input不能用于enctype=multipart/form-data”
总结如下:
- 1)、Coentent-Type仅在取值为application/x-www-data-urlencoded和multipart/form-data两种情况下,PHP才会将http请求数据包中相应的数据填入全局变量$_POST
- 2)、PHP不能识别的Content-Type类型的时候,会将http请求包中相应的数据填入变量$HTTP_RAW_POST_DATA
- 3)、只有Coentent-Type为multipart/form-data的时候,PHP不会将http请求数据包中的相应数据填入php://input,否则其它情况都会。填入的长度,由Coentent-Length指定。
- 4)、只有Content-Type为application/x-www-data-urlencoded时,php://input数据才跟$_POST数据相一致。
- 5)、php://input数据总是跟$HTTP_RAW_POST_DATA相同,但是php://input比$HTTP_RAW_POST_DATA更凑效,且不需要特殊设置php.ini
- 6)、PHP会将PATH字段的query_path部分,填入全局变量$_GET。通常情况下,GET方法提交的http请求,body为空。
总结起来就是,在用$_POST获取不到由APP或者一些接口的回调数据时,就用php://input试试
1、 接受xml数据
//发送xml数据 $xml = '<xml>xmldata</xml>';//要发送的xml $url = 'http://localhost/test/getXML.php';//接收XML地址 $header = 'Content-type: text/xml';//定义content-type为xml $ch = curl_init(); //初始化curl curl_setopt($ch, CURLOPT_URL, $url);//设置链接 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//设置是否返回信息 curl_setopt($ch, CURLOPT_HTTPHEADER, $header);//设置HTTP头 curl_setopt($ch, CURLOPT_POST, 1);//设置为POST方式 curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);//POST数据 $response = curl_exec($ch);//接收返回信息 if(curl_errno($ch)){//出错则显示错误信息 print curl_error($ch); } curl_close($ch); //关闭curl链接 echo $response;//显示返回信息 // php用file_get_contents("php://input")或者$HTTP_RAW_POST_DATA可以接收xml数据 $xmldata = file_get_contents("php://input"); $data = (array)simplexml_load_string($xmldata);
2、手机上传图片到服务器的小程序
发送
//@file phpinput_post.php $data=file_get_contents('btn.png'); $http_entity_body = $data; $http_entity_type = 'application/x-www-form-urlencoded'; $http_entity_length = strlen($http_entity_body); $host = '127.0.0.1'; $port = 80; $path = '/image.php'; $fp = fsockopen($host, $port, $error_no, $error_desc, 30); if ($fp){ fputs($fp, "POST {$path} HTTP/1.1\r\n"); fputs($fp, "Host: {$host}\r\n"); fputs($fp, "Content-Type: {$http_entity_type}\r\n"); fputs($fp, "Content-Length: {$http_entity_length}\r\n"); fputs($fp, "Connection: close\r\n\r\n"); fputs($fp, $http_entity_body . "\r\n\r\n"); while (!feof($fp)) { $d .= fgets($fp, 4096); } fclose($fp); echo $d; }
接收
/** *Recieve image data **/ error_reporting(E_ALL); function get_contents() { $xmlstr= file_get_contents("php://input"); $filename=file_put_contentsxmltime().'.png'; if(($filename,$str)){ echo 'success'; }else{ echo 'failed'; } } get_contents();
3:获取HTTP请求原文
/** * 获取HTTP请求原文 * @return string */ function get_http_raw(){ $raw = ''; // (1) 请求行 $raw .= $_SERVER['REQUEST_METHOD'] . ' ' . $_SERVER['REQUEST_URI'] . ' ' . $_SERVER['SERVER_PROTOCOL'] . "\r\n"; // (2) 请求Headers foreach ($_SERVER as $key => $value) { if (substr($key , 0 , 5) === 'HTTP_') { $key = substr($key , 5); $key = str_replace('_' , '-' , $key); $raw .= $key . ': ' . $value . "\r\n"; } } // (3) 空行 $raw .= "\r\n"; // (4) 请求Body $raw .= file_get_contents('php://input'); return $raw; }
以上就是针对PHP输入流举的三个小栗子,目的在于帮助大家更准确的理解PHP输入流,希望大家有所收获。

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