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php://input是什么

Jun 06, 2016 pm 08:50 PM
inputphp

php://input是什么

php://input是什么?

php://input 

php://input 是个可以访问请求的原始数据的只读流。当请求方式是post,并且Content-Type不等于”multipart/form-data”时,可以使用php://input来获取原始请求的数据。

POST 请求的情况下,最好使用 php://input 来代替 $HTTP_RAW_POST_DATA,因为它不依赖于特定的 php.ini 指令。 而且,这样的情况下 $HTTP_RAW_POST_DATA 默认没有填充, 比激活 always_populate_raw_post_data 潜在需要更少的内存。 enctype="multipart/form-data" 的时候 php://input 是无效的。

Note: 在 PHP 5.6 之前 php://input 打开的数据流只能读取一次; 数据流不支持 seek 操作。 不过,依赖于 SAPI 的实现,请求体数据被保存的时候, 它可以打开另一个 php://input 数据流并重新读取。 通常情况下,这种情况只是针对 POST 请求,而不是其他请求方式,比如 PUT 或者 PROPFIND。

php://output 

php://output 是一个只写的数据流, 允许你以 print 和 echo 一样的方式 写入到输出缓冲区。

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