dataexport.php

См. документацию.

<?php
namespace Bitrix\Sender\Internals;
 
use Bitrix\Main\DB\Result;

class DataExport
{
    public static function toCsv(array $columns, $list, $rowCallback = null)
    {
        self::flushHeaders();
 
        $eol = "\n";
        $columnNames = [];
        $isFirstLinePrinted = false;
 
        echo chr(239) . chr(187) . chr(191);
 
        foreach ($list as $item)
        {
            if ($rowCallback)
            {
                $item = call_user_func_array($rowCallback, [$item]);
            }
 
            $row = [];
            foreach ($columns as $column)
            {
                if (!array_key_exists($column['id'], $item))
                {
                    continue;
                }
 
                if (!$isFirstLinePrinted)
                {
                    $columnNames[] = str_replace('"', '""', $column['name']);
                }
 
                $row[] = str_replace('"', '""', trim($item[$column['id']]));
            }
 
            if (!$isFirstLinePrinted)
            {
                echo '"' . implode('";"', $columnNames) . '"';
                $isFirstLinePrinted = true;
            }
            echo $eol;
            echo '"' . implode('";"', $row) . '"';
        }
 
        exit;
    }
 
    protected static function flushHeaders()
    {
        $GLOBALS['APPLICATION']->RestartBuffer();
 
        header('Content-Description: File Transfer');
        header('Content-Type: text/csv; charset='.LANG_CHARSET);
        header('Content-Disposition: attachment; filename=address_list.csv');
        header('Content-Transfer-Encoding: binary');
        header('Expires: 0');
        header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
        header('Pragma: public');
    }
}