Error @ line 62

[venkibadduri]

$data = array_map(function($row)
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /opt/lampp/htdocs/dbis/venki/AmBank/XLSXReader-master/sample.php on line 62

Pleae help me to solve

code is as follows

$data = array_map(function($row)
{
$converted = XLSXReader::toUnixTimeStamp($row[0]);
return array($row[0], $converted, date('c', $converted), $row[1]);
}, $xlsx->getSheetData('Dates'));
array_unshift($data, array('Excel Date', 'Unix Timestamp', 'Formatted Date', 'Data'));
array2Table($data);
?>

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