PHP 的snmp各个版本的Wrapper封装类

原文来自：http://blog.chinaunix.net/uid-7654720-id-3211234.html

class SNMP_Wrapper {
    protected $_host;
    protected $_community;
    protected $_version;

    public function __construct($host = 'localhost', $community = 'public', $version = 1) {
        $this->_host = $host;
        $this->_community = $community;
        switch ($version) {
            case 2:
                $this->_version = '2';
                break;
            case 3:
                $this->_version = '3';
                break;//注意，原文缺少了break，造成使用版本3时会调用默认的版本1的函数
            default:
                $this->_version = '';
                break;
        }
    }

    public function __call($func, $args) {
        $func = strtolower(preg_replace('/([A-Z])/', '_$1', $func));
        $function = 'snmp' . $this->_version . (empty($this->_version) ? '' : '_') . $func;
        if (function_exists($function)) {
            var_dump($function);
            return call_user_func_array($function, array_merge(array($this->_host, $this->_community), $args));
        }
    }
}

//debug
$snmp = new SNMP_Wrapper("127.0.0.1", "public", 3);
$result = @$snmp->get("iso.3.6.1.2.1.1.3.0");
var_dump($result);exit;