phpCAS error: phpCAS::client(): CAS_TypeMismatchException: type mismatched for parameter $changeSessionID (should be 'boolean '), string given.

原因：PHP版本不同，对参数存在一定限制

解决办法：判断一下PHP版本，给不同的参数

// Enable verbose error messages. Disable in production!
        phpCAS::setVerbose(true);
        //此方法对PHP版本有一定要求，不同版本的PHP，参数要求不一样 报错：phpCAS error: phpCAS::client(): CAS_TypeMismatchException: type mismatched for parameter $changeSessionID (should be 'boolean '), string given. 
        if (PHP_MAJOR_VERSION>7){
            phpCAS::client(CAS_VERSION_3_0, $_sso_config['server_ip'], $_sso_config['server_port'], $_sso_config['server_path'],"http://".$_SERVER['HTTP_HOST']);
        }else{
            phpCAS::client(CAS_VERSION_3_0, $_sso_config['server_ip'], $_sso_config['server_port'], $_sso_config['server_path']);
        }