You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: freepbx_config_exec.rb
    path of file: ./repos/metasploit-framework/modules/exploits/unix/webapp
    
    the code of the file until where you have to start completion: ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info={})
    super(update_info(info,
      'Name'           => "FreePBX config.php Remote Code Execution",
      'Description'    => %q{
        This module exploits a vulnerability found in FreePBX version 2.9, 2.10, and 2.11.
        It's possible to inject arbitrary PHP functions and commands in the "/admin/config.php"
        parameters "function" and "args".
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'i-Hmx', # Vulnerability discovery
          '0x00string', # PoC
          'xistence <xi
    
  def initialize(info={})
    super(update_info(info,
      'Name'           => "FreePBX config.php Remote Code Execution",
      'Description'    => %q{
        This module exploits a vulnerability found in FreePBX version 2.9, 2.10, and 2.11.
        It's possible to inject arbitrary PHP functions and commands in the "/admin/config.php"
        parameters "function" and "args".
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'i-Hmx', # Vulnerability discovery
          '0x00string', # PoC
          'xistence <xistence[at]0x90.nl>' # Metasploit module
        ],
      'References'     =>
        [
          ['CVE', '2014-1903'],
          ['OSVDB', '103240'],
          ['EDB', '32214'],
          ['URL', 'http://issues.freepbx.org/browse/FREEPBX-7123']
        ],
      'Platform'       => 'unix',
      'Arch'           => ARCH_CMD,
      'Targets'        =>
        [
          ['FreePBX', {}]
        ],
      'Privileged'     => false,
      'DisclosureDate' => '2014-03-21',
      'DefaultTarget'  => 0))

      register_options(
        [
          OptString.new('TARGETURI', [true, 'The base path to the FreePBX installation', '/'])
        ])

      register_advanced_options(
        [
          OptString.new('PHPFUNC', [true, 'The PHP execution function to use', 'passthru'])
        ])
  end