tools.php

См. документацию.

<?php
namespace Bitrix\Catalog\Helpers;

class Tools
{
    public static function checkExistKeys(array $fields, array $keyList, $checkNull = false)
    {
        $result = false;
        if (empty($fields) || empty($keyList))
            return $result;
 
        $checkNull = ($checkNull === true);
        if (!$checkNull)
            $fields = array_filter($fields, '\Bitrix\Catalog\Helpers\Tools::clearNullFields');
 
        foreach ($keyList as &$key)
        {
            if (array_key_exists($key, $fields))
            {
                $result = true;
                break;
            }
        }
        unset($key);
 
        return $result;
    }

    public static function getMissingKeys(array $fields, array $keyList, $checkNull = false)
    {
        $result = array();
        if (empty($keyList))
            return $result;
        if (empty($fields))
            return $keyList;
 
        $checkNull = ($checkNull === true);
        if (!$checkNull)
            $fields = array_filter($fields, '\Bitrix\Catalog\Helpers\Tools::clearNullFields');
 
        foreach ($keyList as &$key)
        {
            if (!array_key_exists($key, $fields))
                $result[] = $key;
        }
        unset($key);
        return $result;
    }

    public static function prepareKeys(array $fields, array $keyList, $checkNull = false)
    {
        $result = array(
            'EXIST' => array(),
            'MISSING' => array()
        );
        if (empty($keyList))
            return false;
 
        if (empty($fields))
        {
            $result['MISSING'] = $keyList;
            return $result;
        }
 
        $checkNull = ($checkNull === true);
        if (!$checkNull)
            $fields = array_filter($fields, '\Bitrix\Catalog\Helpers\Tools::clearNullFields');
 
        foreach ($keyList as &$key)
        {
            if (!array_key_exists($key, $fields))
                $result['MISSING'][] = $key;
            else
                $result['EXIST'][] = $key;
        }
        unset($key);
        return $result;
    }

    public static function clearNullFields($value)
    {
        return ($value !== null);
    }
}