IXR_IntrospectionServer

9class IXR_IntrospectionServer extends IXR_Server10{11    var $signatures;12    var $help;13 14	/**15	 * PHP5 constructor.16	 */17    function __construct()18    {19        $this->setCallbacks();20        $this->setCapabilities();21        $this->capabilities['introspection'] = array(22            'specUrl' => 'http://xmlrpc.usefulinc.com/doc/reserved.html',23            'specVersion' => 124        );25        $this->addCallback(26            'system.methodSignature',27            'this:methodSignature',28            array('array', 'string'),29            'Returns an array describing the return type and required parameters of a method'30        );31        $this->addCallback(32            'system.getCapabilities',33            'this:getCapabilities',34            array('struct'),35            'Returns a struct describing the XML-RPC specifications supported by this server'36        );37        $this->addCallback(38            'system.listMethods',39            'this:listMethods',40            array('array'),41            'Returns an array of available methods on this server'42        );43        $this->addCallback(44            'system.methodHelp',45            'this:methodHelp',46            array('string', 'string'),47            'Returns a documentation string for the specified method'48        );49    }50 51	/**52	 * PHP4 constructor.53	 */54	public function IXR_IntrospectionServer() {55		self::__construct();56	}57 58    function addCallback($method, $callback, $args, $help)59    {60        $this->callbacks[$method] = $callback;61        $this->signatures[$method] = $args;62        $this->help[$method] = $help;63    }64 65    function call($methodname, $args)66    {67        // Make sure it's in an array68        if ($args && !is_array($args)) {69            $args = array($args);70        }71 72        // Over-rides default call method, adds signature check73        if (!$this->hasMethod($methodname)) {74            return new IXR_Error(-32601, 'server error. requested method "'.$this->message->methodName.'" not specified.');75        }76        $method = $this->callbacks[$methodname];77        $signature = $this->signatures[$methodname];78        $returnType = array_shift($signature);79 80        // Check the number of arguments81        if (count($args) != count($signature)) {82            return new IXR_Error(-32602, 'server error. wrong number of method parameters');83        }84 85        // Check the argument types86        $ok = true;87        $argsbackup = $args;88        for ($i = 0, $j = count($args); $i < $j; $i++) {