Hello SehaSky !

Let me try to add the current comments :-) My answers have the bold font.

if(empty($sProfileModule))

       return array();

If the given module's name is empty, return the empty array for the block (empty block), exit from the method.

if(empty($iProfileContentId) && bx_get('id') !== false)

       $iProfileContentId = bx_process_input(bx_get('id'), BX_DATA_INT);

If the given profile id is empty, but the GET id variable exists, the profile id will take the value of $_GET['id'].

$oProfile = BxDolProfile::getInstanceByContentAndType($iProfileContentId, $sProfileModule);

The creation of $oProfile object according the given info.

if(empty($oProfile)) 

        return array();

if the creation of this object fails then then return the empty array, exit from the method. 

$iProfileId = $oProfile->id();

The taking value of $oProfile->id() field to $iProfileId variable.

$sType = BX_BASE_MOD_NTFS_TYPE_OWNER;

The setting the type of "post" mode.

return $this->_getBlockPost($iProfileId, array(

            'type' => $sType,

            'form_display' => $this->_oConfig->getPostFormDisplay($sType)

        ));

The calling _getBlockPost method with the formed parameters.