php://input - 它在 fopen() 中做什么？

Question

$handle = fopen("/home/rasmus/file.txt", "r");
$handle = fopen("/home/rasmus/file.gif", "wb");

我可以理解，/home/rasmus/file.txt和/home/rasmus/file.gif是文件路径。

但是这些意味着什么:

php://input
php://temp

在

$objInputStream = fopen("php://input", "r");
$objTempStream = fopen("php://temp", "w+b");

他们是做什么的？

Answer 1

php://input is a read-only stream that allows you to read raw data from the request body. In the case of POST requests, it is preferable to $HTTP_RAW_POST_DATA as it does not depend on special php.ini directives. Moreover, for those cases where $HTTP_RAW_POST_DATAis 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".

查看手册:http://php.net/manual/en/wrappers.php.php