用PHP的Socket建立自己的聊天室服务器

<?PHP
/**
* patServer
* PHP socket server base class
* Events that can be handled:
*   * onStart
*   * onConnect
*   * onConnectionRefused
*   * onClose
*   * onShutdown
*   * onReceiveData
*
* @version 1.1
* @author   Stephan Schmidt <schst@php-tools.de>
* @package patServer
*/
class patServer{
/**
* information about the project
* @var array $systemVars
*/
var $systemVars   = array(

    "appName"   => "patServer",
    "appVersion"   => "1.1",
    "author"   => array("Stephan Schmidt <schst@php-tools.de>", )
   );

/**
* port to listen
* @var integer   $port
*/
   var $port   = 10000;

/**
* domain to bind to
* @var string $domain
*/
   var $domain   = "localhost";

/**
* maximum amount of clients
* @var integer $maxClients
*/
   var $maxClients = -1;

/**
* buffer size for socket_read
* @var integer $readBufferSize
*/
   var $readBufferSize   = 128;

/**
* end character for socket_read
* @var integer $readEndCharacter
*/
   var $readEndCharacter = "\n";

/**
* maximum of backlog in queue
* @var integer $maxQueue
*/
   var $maxQueue = 500;

/**
* debug mode
* @var boolean $debug
*/
   var $debug   = true;

/**
* debug mode
* @var string $debugMode
*/
   var $debugMode = "text";

/**
* debug destination (filename or stdout)
* @var string $debugDest
*/
   var $debugDest = "stdout";

/**
* empty array, used for socket_select
* @var array $null
*/
   var $null   = array();

/**
* all file descriptors are stored here
* @var array $clientFD
*/
   var $clientFD = array();

/**
* needed to store client information
* @var array $clientInfo
*/
   var $clientInfo = array();

/**
* needed to store server information
* @var array $serverInfo
*/
   var $serverInfo = array();

/**
* amount of clients
* @var integer   $clients
*/
   var $clients = 0;

/**
* create a new socket server
*
* @access public
* @param string   $domain   domain to bind to
* @param integer   $port   port to listen to
*/
function patServer( $domain = "localhost", $port = 10000 ){
   $this->domain = $domain;
   $this->port   = $port;

   $this->serverInfo["domain"]         = $domain;
   $this->serverInfo["port"]         = $port;
   $this->serverInfo["servername"]     = $this->systemVars["appName"];
   $this->serverInfo["serverversion"] = $this->systemVars["appVersion"];

   set_time_limit( 0 );
}

/**
* set maximum amount of simultaneous connections
*
* @access public
* @param int $maxClients
*/
function setMaxClients( $maxClients ){
   $this->maxClients = $max

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