How to find an error in PHP code?

Question

PHP

To set up a slider on Bitrix, the following code must work.
But when I add it to the page I get a white screen

<?
                            $sliders = array();
                            for( $i= 0 ; $i <= 10 ; $i++ ) {
                                if (isset($APPLICATION->GetPageProperty("slider" . $i))) {
                                    $sliders[$i]['slider'] = $APPLICATION->GetPageProperty("slider" . $i);
                                }
                          }
                        ?>

Answer 1

You are not using isset correctly . She needs to slip a variable.
In general, it is better to implement a slider on the elements of the infoblock and the news.list component.