Hello SehaSky !

If $iContentId variable isn't passed as the argument then it is calculated with the method _getContent. For the profile-based modules like Persons it has the following syntax:

    protected function _getContent($iContentId = 0, $sFuncGetContent = 'getContentInfoById')

    {

        if(!$iContentId && bx_get('id') === false && bx_get('profile_id') !== false) {

            $oProfile = BxDolProfile::getInstance((int)bx_get('profile_id'));

            if($oProfile)

                $iContentId = $oProfile->getContentId();

        }

        return parent::_getContent($iContentId, $sFuncGetContent);

    }

So by default, firstly it will look the GET id or profile_id variables.