// Example of PHP Filesystem usage $file = 'example.txt'; if (file_exists($file)) { unlink($file); }
// Example of PHP Process usage $cmd = 'ls -l'; $output = shell_exec($cmd); echo "$output";
// Example of PHP Environment usage echo getenv('HOME');
// Example of PHP Sockets usage $host = 'localhost'; $port = 8000; $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); socket_bind($socket, $host, $port); socket_listen($socket); $client = socket_accept($socket); $message = "Hello, you are connected to the server."; socket_write($client, $message, strlen($message)); socket_close($client); socket_close($socket);Overall, the PHP System packages are used to interact with the server and operating system in various ways, and can be useful for a variety of web development tasks.