You could also just

change

function getComments ($iCmtsParentId = null, &$iOverflow = null, &$iCountTotal = null)

to

function getComments ($iCmtsParentId = null, $iOverflow = null, $iCountTotal = null)

or

function getComments ($iCmtsParentId = 0, $iOverflow = 0, $iCountTotal = 0)

and remove the & @ line 176