PHP input and output stream study notes_PHP tutorial

PHP input and output stream study notes

This article mainly introduces PHP input and output stream study notes. PHP input and output streams are accessed through php://. Allows access to PHP's input and output streams, standard input and output and error descriptors, temporary file streams in memory and disk backup, and filters that can operate other read and write file resources. Friends in need can refer to

PHP input and output streams are accessed through php://, which allows access to PHP's input and output streams, standard input and output, and error descriptors, temporary file streams in memory, disk backup, and other read operations. Filter for writing to file resources.

　php://stdin, php://stdout and php://stderr

　php://stdin, php://stdout and php://stderr allow access to the corresponding input or output streams of the PHP process.

php://input

php://input is a read-only stream that can access the requested raw data. In the case of POST requests, it is best to use php://input instead of $HTTP_RAW_POST_DATA (native post data), because it does not rely on specific php.ini instructions and consumes less memory. For example:

　?

1 2 3 4 5 6 echo file_get_contents("php://input"); ?> 1 2 3 4 5 6

echo file_get_contents("php://input"); ?>