如题 空数组模式下 一直会空数组报错 ，然后会一直显示白屏
app.mod.php
从23行到51行
暂时改成 以下代码 ，进一步 优化抽空再处理

foreach ($navs as &$row) {
            if(is_array($row)){
                if (!strexists($row['url'], 'tel:') && !strexists($row['url'], '://') && !strexists($row['url'], 'www') && !strexists($row['url'], 'i=')) {
                    $row['url'] .= strexists($row['url'], '?') ? "&i={$_W['uniacid']}" : "?i={$_W['uniacid']}";
                }
                if(is_array($row['css'])){
                    if (is_serialized($row['css'])) {
                        $row['css'] = unserialize($row['css']);
                    }
                    if(is_array($row['css']['icon'])){

                        if(is_array($row['css']['icon']['icon'])){
                            if (empty($row['css']['icon']['icon'])) {

                                $row['css']['icon']['icon'] = 'fa fa-external-link';
                            }
                        }
                        if ($row['position'] == '3') {
                            if (!empty($row['css'])) {
                                unset($row['css']['icon']['font-size']);
                            }
                        }
                        $row['css']['icon']['style'] = "color:{$row['css']['icon']['color']};font-size:{$row['css']['icon']['font-size']}px;";
                        $row['css']['name'] = "color:{$row['css']['name']['color']};";
                    }
                }
            }

        }