Getlist goods

404 page

//404 add statys
if(count($arSectionCurrent) === 0){
    @define('ERROR_404', 'Y');
    CHTTP::SetStatus('404 Not Found');
}

//404 show error page
global $APPLICATION;
if ((defined('ERROR_404')) && (ERROR_404=='Y'))
{
    $APPLICATION->RestartBuffer();
    CHTTP::SetStatus("404 Not Found");
    include($_SERVER["DOCUMENT_ROOT"].SITE_TEMPLATE_PATH."/header.php");
    require ($_SERVER["DOCUMENT_ROOT"]."/404.php");
    //include($_SERVER["DOCUMENT_ROOT"].SITE_TEMPLATE_PATH."/footer.php");
    die();
}

Add to IBlock

$el = new CIBlockElement;
            $arProp = array(
                248 => $arItem['SELECTED_ITEM_ID'],
                249 => $arItem2['SELECTED_ITEM_ID'],
            );
            $arFields = array(
                "NAME" => $arItem['NAME'] . ' vs ' . $arItem2['NAME'],
                "ACTIVE" => "Y",
                "IBLOCK_ID" => 48,
                "PROPERTY_VALUES" => $arProp,
                "CODE" => $arItem['CODE'] . '-vs-' . $arItem2['CODE'],
            );
            $id = $el->Add($arFields);

            if ($id === false) {
                echo $el->LAST_ERROR;
            }

Delete orders list

use Bitrix\Main\Loader;
Loader::includeModule("iblock");
Loader::includeModule("sale");

$arListOrder = array();
$arFilter = Array();
$arNavStartParams = array(
    'nTopCount' => 100
);
$arSelectFields = array(
   'ID'
);
$db_sales = CSaleOrder::GetList(array("DATE_INSERT" => "DESC"), $arFilter, false, $arNavStartParams, $arSelectFields);
while ($ar_sales = $db_sales->Fetch())
{
   $arListOrder[] = $ar_sales;
}

foreach ($arListOrder as $arItem){
   CSaleOrder::Delete($arItem['ID']);
}

Descount Price

$price = CCatalogProduct::GetOptimalPrice($productID, 1, $USER->GetUserGroupArray(), 'N');
print_r(price);

edit links(edit, delete)

foreach ($arAdvantageSection['ITEMS'] as &$arItem){
  $arButtons = CIBlock::GetPanelButtons(
  ADVANTAGES_SECTION_ID,
  $arItem["ID"],
  0,
  array("SECTION_BUTTONS"=>false, "SESSID"=>false)
  );
  $arItem["EDIT_LINK"] = $arButtons["edit"]["edit_element"]["ACTION_URL"];
  $arItem["DELETE_LINK"] = $arButtons["edit"]["delete_element"]["ACTION_URL"];
}
unset($arItem);

Get - Set Properties

//сохранение свойств в файл
$filename = 'prop_list.txt';
$IBLOCK_ID = 5;

$properties = CIBlockProperty::GetList(Array("sort" => "asc", "name" => "asc"), Array("ACTIVE" => "Y", "IBLOCK_ID" => $IBLOCK_ID));
while ($prop_fields = $properties->GetNext()) {
    $arPropList[] = $prop_fields;
}

$data = serialize($arPropList);
file_put_contents($filename, $data);

//запись свойств в инфоблок
$data = file_get_contents($filename);
$bookshelf = unserialize($data);

if (!empty($bookshelf)) {

    $intIblockID = 10;

    foreach ($bookshelf as $arItem) {

        $arFields = Array(
            "NAME" => $arItem['NAME'],
            "ACTIVE" => $arItem['ACTIVE'],
            "SORT" => $arItem['SORT'],
            "CODE" => $arItem['CODE'],
            "PROPERTY_TYPE" => $arItem['PROPERTY_TYPE'],
            "IBLOCK_ID" => $intIblockID,
            "MULTIPLE" => $arItem['MULTIPLE'],
        );

        if(!empty($arItem['USER_TYPE'])){
            $arFields['USER_TYPE'] = $arItem['USER_TYPE'];
        }

        $ibp = new CIBlockProperty;
        $PropID = $ibp->Add($arFields);

    }
}
?>

Get values property by code

$strPropertyCodePrice = 'PRICE';
$arPropertyID = array();

$resPropertyEnums = CIBlockPropertyEnum::GetList(Array(), Array("IBLOCK_ID" => BASE_CATALOG_ID, "CODE" => $strPropertyCodePrice));
while ($arFieldsEnums = $resPropertyEnums->GetNext()) {
    $arPropertyID[] = $arFieldsEnums['ID'];
}

Getlist goods

$arResult = array();
$arSelect = array(
    "IBLOCK_ID",
    "ID",
    "CATALOG_GROUP_1"
);
$arFilter = array(
    "IBLOCK_ID"=>3,
    "ACTIVE_DATE"=>"Y",
    "ACTIVE"=>"Y",
    "SECTION_ID" => 6,
    "INCLUDE_SUBSECTIONS" => "Y",
    "CATALOG_AVAILABLE" => "Y"
);
$dbElement = CIBlockElement::GetList(
    array("RAND" => "ASC"),
    $arFilter,
    false,
    array("nPageSize"=>10),
    $arSelect
);
while($arFields = $dbElement->GetNextElement())
{
    $arResult['ITEMS'][] = $arFields->GetFields();
    $arResult['PROP'][] = $arFields->GetProperties();
    
    //multi
    $arProperties[] = $arFields->GetProperties(array(), array('CODE' => 'name-code-property'));
}

//simple select no property
while($arFields = $dbElement->GetNext())
{
    $arResult['ITEMS'][] = $arFields;
}

getList Section

CModule::IncludeModule("iblock");

$arSectionList = array();
$arSelect = array(
    "IBLOCK_ID",
    "ID",
    "NAME",
    "CODE"
);
$arFilter = array(
    "IBLOCK_ID" => 5,
    "DEPTH_LEVEL" => 1,
    "ACTIVE" => "Y",
    "GLOBAL_ACTIVE" => "Y"
);
$dbSection  = CIBlockSection::GetList(
    array("SORT" => "ASC"),
    $arFilter,
    true,
    $arSelect
);
while ($arFieldsSection = $dbSection->GetNext()) {
    $arSectionList[] = $arFieldsSection;
}

Property

$res = \Bitrix\Iblock\Model\PropertyFeature::setFeatures($intPropertyID, [
    ["FEATURE_ID"=>"DETAIL_PAGE_SHOW", "IS_ENABLED" => "Y", "MODULE_ID" => "iblock"], //деталка
    ["FEATURE_ID"=>"LIST_PAGE_SHOW", "IS_ENABLED" => "N", "MODULE_ID" => "iblock"] //список
]);

Set multi values property

$strPropertyCodePrice = 'PRICE';
$arPropertyID = array(1,2,3,4);

CIBlockElement::SetPropertyValuesEx($intProductID, false, array($strPropertyCodePrice => $arPropertyID));

Similar goods

$intID = 'ID items';

$arSelect = Array(
    "IBLOCK_ID",
    "ID"
);
$arFilter = Array(
    "IBLOCK_ID"=>37,
    "ACTIVE"=>"Y"
);
$res = CIBlockElement::GetList(
    array('ID' => 'DESC'),
    $arFilter,
    false,
    array('nPageSize' => 1, 'nElementID' => $intID),
    $arSelect
);
while($ob = $res->GetNextElement())
{
    $arFields = $ob->GetFields();
    $arItemsID[] = $arFields['ID'];
}

if(count($arItemsID) == 2 && $intID == $arItemsID[0]){
    $arResult['ITEMS'][0]['PREV_ITEM'] = 0;
    $arResult['ITEMS'][0]['NEXT_ITEM'] = $arItemsID[1];
}elseif(count($arItemsID) == 3){
    $arResult['ITEMS'][0]['PREV_ITEM'] = $arItemsID[0];
    $arResult['ITEMS'][0]['NEXT_ITEM'] = $arItemsID[2];
}else{
    $arResult['ITEMS'][0]['PREV_ITEM'] = $arItemsID[0];
    $arResult['ITEMS'][0]['NEXT_ITEM'] = 0;
}

//html
<? if (!empty($arItem['PREV_ITEM']) && $arItem['PREV_ITEM'] != 0): ?>
  <a href="#" data-item="<?= $arItem['PREV_ITEM'] ?>">PREV</a>
<? endif; ?>

<? if (!empty($arItem['NEXT_ITEM']) && $arItem['NEXT_ITEM'] != 0): ?>
  <a href="#" data-item="<?= $arItem['NEXT_ITEM'] ?>">NEXT</a>
<? endif; ?>

Update all property

if (\Bitrix\Main\Loader::includeModule('iblock')) {
    $IBLOCK_ID = CATALOG; // Идентификатор инфоблока
    $properties = CIBlockProperty::GetList(
        Array("sort"=>"asc", "name"=>"asc"),
        Array("ACTIVE"=>"Y", "IBLOCK_ID"=>$IBLOCK_ID)
    );

    while ($prop_fields = $properties->GetNext())
    {
        if($prop_fields["SORT"]>=500) {
            \Bitrix\Iblock\Model\PropertyFeature::setFeatures(
                $prop_fields["ID"],[[
                    "MODULE_ID"=>"iblock",
                    "IS_ENABLED"=>"Y",
                    "FEATURE_ID" => "DETAIL_PAGE_SHOW"
                ]]
            );
        }
    }
}

Доп. информация по каталогу

// мульти сортировка в catalog.section
$arParams["CUSTOM_SORT_ORDER"] = ["PROPERTY_AVAILABILITY" => "desc", "catalog_PRICE_1" => "desc", ];

навигация bitrix

https://tokmakov.msk.ru/blog/item/227