replacing special characters while searching

[digidreams]

facing problem while searching a keyword from the mysql database

the fuction is dispayed below and i need the word "celllabs & Co., Inc." to displayed in the search results.
can you correct the code below

function returnUnitSearch($details)
    {
            $newArray = array_keys($details);
            for ($i=0;$i<count($newArray)-2;$i++)
            {
                $strVal = $newArray[$i];
                $newStr = str_replace("_"," ",$strVal);
                $newStr1 = str_replace("("," ",$newStr);
                $newStr2 = str_replace(")"," ",$newStr1);
                $modifiedStr = strtolower($newStr2);
                $searchCriteriaNew = $searchCriteriaNew."+".$modifiedStr;
            }
                             
            $searchCriteria1 = $searchCriteriaNew;           
            $arrayUnit = explode("+",$searchCriteria1);
            $searchUnits = null;
            for ($i = 0; $i < count($arrayUnit); $i++)
            {
                if ($arrayUnit[$i] != '')
                    $searchUnits = $searchUnits.",'".$arrayUnit[$i]."'";
            }                   
            $finalUnitSearch = substr_replace($searchUnits, "", 0, 1);
            return $finalUnitSearch;
    }