loader.php

См. документацию.

<?php
 
namespace Bitrix\Iblock\ORM;
 
use Bitrix\Iblock\IblockTable;

class Loader
{
    public static function autoLoad($class)
    {
        // search for data classes only
        // object and collection classes will be resolved by main orm loader
        if (mb_substr($class, -5) !== 'Table')
        {
            return;
        }
 
        // check iblock regular namespace
        $namespace = mb_substr($class, 0, mb_strrpos($class, '\\'));
        $className = mb_substr($class, mb_strrpos($class, '\\') + 1);
 
        if (
            $namespace == IblockTable::DATA_CLASS_NAMESPACE // regular iblock entity namespace
            && mb_strpos($className, IblockTable::DATA_CLASS_PREFIX) === 0 // prefix of iblock entities
        )
        {
            $iblockApiCode = mb_substr($className, mb_strlen(IblockTable::DATA_CLASS_PREFIX), -5);
            IblockTable::compileEntity($iblockApiCode);
        }
    }
}