for ($row = 0; $row < count($strongCorr); $row++) {
                $string2="";
                //$string=$strongCorr[$row];
                echo "<tr><td>".$strongCorr[$row]. "</td>";
                echo "<td>".$strongCorr[$row+1]."</td>";

                echo $string2 = str_replace(" ","",$strongCorr[$row]);
                echo $number=$strongCorr[$row+1];
                echo "<td><a href=../analytics/view_correlation_station.php?strongCorr=$string2&strongCorrValue=$number><button type=button name=correlation id=happy class='pN btn btn-secondary'>Correlation</button></a></td>";
                echo "</tr>";
                $row++;

            }

http://127.0.0.1/THESIS/system/WEB-INF/analytics/view_correlation_station.php?strongCorr=CrimeVolumeXCrimeRate&strongCorrValue=0.88

$strongCorr= $_GET["strongCorr"];
echo $strongCorr;