PHP warning Uninitialized string offset 0 /var/www/limesurvey/application/views/admin/export/statistics_subviews/_question.php(820) 808                         echo htmlspecialchars(implode(',',$_POST[$myfield2])); 809                     } 810                     echo " -->\n"; 811 812                     echo '<div class="statistics-responses-label-group ls-space padding bottom-5 top-15 ls-flex-item">'; 813                     //output checkbox and question/label text 814                     echo "<input type='checkbox' name='summary[]' value='$myfield2'"; 815 816                     //pre-check 817                     if (isset($summary) && array_search($myfield2, $summary)!== FALSE) {echo " checked='checked'";} 818 819                     //check if there is a dualscale_headerA/B 820                     $dshresult = $dshresults[$key1][0]; 821 822                     //get header 823                     foreach($dshresult as $dshrow) 824                     { 825                         $dshrow=array_values($dshrow); 826                         $dualscaleheadera = $dshrow[0]; 827                     } 828 829                     if(isset($dualscaleheadera) && $dualscaleheadera != "") 830                     { 831                         $labeltitle = $dualscaleheadera; 832                     }