php输入流php://input使用浅析,输入流input
php输入流php://input使用浅析,输入流input
在做一个摄像头拍照然后上传的功能,php中使用php://input来获取内容。于是就了解了下php://input。
从官网信息来看,php://input是一个只读信息流,当请求方式是post的,并且enctype不等于”multipart/form-data”时,可以使用php://input来获取原始请求的数据。
看一个简单的例子。
客户端就是一个表单,非常简单。
复制代码 代码如下:
将表单提交到服务端,服务端使用file_get_contents获取php://input内容
复制代码 代码如下:
$content = file_get_contents("php://input");
echo $content; //输出name=tom&age=22
官网关于php://input的说明中,反复有提到$HTTP_RAW_POST_DATA这个变量,这个变量其实和 file_get_contents(php://input)的内容是一样的。如果要开启这个变量,需要修改配置文件,找到 always_populate_raw_post_data这个选项,设置为On,然后重新启动web服务器,就可以了。而使用php://input 不需要修改php配置文件。
在项目应用中,如摄像头拍照,上传保存,就可以用到php://input。客户端拍照后,把图片流传送到服务端,服务端使用file_get_getcontents(‘php://input')就能获取到图片流,然后把图片流保存到一个文件,这个文件就是图片了。
将php输入流读取到一个字符串,和$_post和$_GET还有所不同的,呵呵,具体可以看manual
$content = file_get_contents("php://input");
file_put_contents('a.txt',$content);

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