if (isset($col_cfg['txtrenderer'])) {
if (is_a($col_cfg['txtrenderer'], 'Closure')) {
- $v = $col_cfg['txtrenderer']->call($this, $cl[$col_cfg['dataIndex']], $worksheet, $r+1, $c, $clo);
+ $v = $col_cfg['txtrenderer']->call(null, $cl[$col_cfg['dataIndex']], $worksheet, $r+1, $c, $clo);
} else {
$v = call_user_func($col_cfg['txtrenderer'],
$cl[$col_cfg['dataIndex']], $worksheet, $r+1, $c, $clo);