Protocol¶
A protocol is a scheme part of a URL, with an associated wrapper.
In a URL like ftp://www.site.com/file.txt, the protocol is ftp, and relates to the FTP protocol. It is also a predefined PHP wrapper.
<?php
$html = file_get_content('http://www.php.net/');
?>
See also https://www.geeksforgeeks.org/protocols-and-wrapper-in-php/
Related : Wrapper, Hyper Text Transfer Protocol (HTTP), Hyper Text Transfer Protocol Secure (HTTPS), php://, Stream Wrapper, Stream Wrapper
