<?php

$trainingAssocArray = $sql->assoc_array("
    SELECT
        tr_id 'Azonosító',
        substring(tr_date,1,16) 'Időpont',
        trt_name 'Típus',
        GROUP_CONCAT(DISTINCT ua_name) 'Edzők',
        COUNT(pr_id) 'Létszám'
    FROM
        training
            JOIN
        training_type ON trt_id = tr_training_type_trt_id
            JOIN
        training_coach ON trc_training_tr_id = tr_id
            JOIN
        user_coach ON ua_id = trc_coach_uc_id
            JOIN
        presence ON pr_training_tr_id = tr_id
    WHERE
        tr_deleted = 0
    GROUP BY tr_id
    ORDER BY tr_date ASC;
");

$filename = "edzeslista.csv";
$fp = fopen('php://output', 'w');

ob_end_clean();
fputcsv($fp, array_keys(reset($trainingAssocArray)), ';');

header('Content-type: application/csv');
header('Content-Disposition: attachment; filename='.$filename);

foreach($trainingAssocArray as $row) {
    fputcsv($fp, $row, ';');
}
exit(1);