I tried that it still doesn't work. Here are the values created.
//keyword array declarations
$KeyArr1 = array("ProductName");
$KeyArr2 = array("ProductSKU");
//comparison list additions
$WADbSearch1->keywordComparison($KeyArr1,"ProductSearch","AND","Includes","%20AND%20","%20OR%20","%22","%22",0);
$WADbSearch1->keywordComparison($KeyArr2,"ProductSearch","OR","Includes",",%20","%20","%22","%22",0);