<?PHP

  $socketContext = array (
    "Sockets" => array (),
    "Contexts" => array (),
  );
  
  function getContextSockets () {
    global $socketContext;
    
    return $socketContext ["Sockets"];
  }
  
  function setContextSocket ($Socket, $Context) {
    global $socketContext;
    
    // Append to sockets
    $socketContext ["Sockets"][] = $Socket;
    
    // Find key of socket
    $Candidates = array_keys ($socketContext ["Sockets"], $Socket, true);
    
    foreach ($Candidates as $Candidate)
      $socketContext ["Contexts"][$Candidate] = $Context;
    
    return true;
  }
  
  function getSocketContext ($Socket) {
    global $socketContext;
    
    // Find key of socket
    $Candidates = array_keys ($socketContext ["Sockets"], $Socket, true);
    
    // Find the context
    foreach ($Candidates as $Candidate)
      if (isset ($socketContext ["Contexts"][$Candidate]))
        return $socketContext ["Contexts"][$Candidate];
    
    return null;
  }
  
  function unsetSocketContext ($Socket) {
    global $socketContext;

    // Find key of socket
    $Candidates = array_keys ($socketContext ["Sockets"], $Socket, true);

    // Find the context
    foreach ($Candidates as $Candidate) {
      unset ($socketContext ["Sockets"][$Candidate]);
      unset ($socketContext ["Contexts"][$Candidate]);
    }
  }

?>