sectionproperty.php

См. документацию.

<?php
namespace Bitrix\Iblock\Template\Entity;
 
class SectionProperty extends Base
{
    protected $iblockId = 0;

    public function __construct($id)
    {
        parent::__construct($id);
    }

    public function setIblockId($iblockId)
    {
        $this->iblockId = intval($iblockId);
    }

    public function setFields(array $fields)
    {
        parent::setFields($fields);
        if (
            is_array($this->fields)
            && $this->iblockId > 0
        )
        {
            foreach ($this->fields as $id => $value)
            {
                if (mb_substr($id, 0, 3) === "UF_")
                {
                    $propertyCode = $id;
                    $fieldCode = mb_strtolower(mb_substr($id, 3));
                    $this->fieldMap[$fieldCode] = $propertyCode;
                }
            }
        }
    }

    protected function loadFromDatabase()
    {
        global $USER_FIELD_MANAGER;
 
        if (!isset($this->fields) && $this->iblockId > 0)
        {
            $userFields = $USER_FIELD_MANAGER->getUserFields(
                "IBLOCK_".$this->iblockId."_SECTION",
                $this->id
            );
            foreach ($userFields as $id => $uf)
            {
                $this->addField(mb_substr($id, 3), $id, $uf["VALUE"]);
            }
        }
        return is_array($this->fields);
    }
}