PHP generates csv to display complete Arabic numerals (example)

$arr = array (
 array ('111', 2222, '0555'),
 array ('222', 3333, '0666')
);
$fp = fopen ('t.csv', 'w');
foreach ($arr as $row) {
 fputcsv($fp, array_map('h', $row));
}
fclose($fp);

 function h($v) {
 if (($v{0} == '0') && is_numeric($v)) {
 $v = '="' . $v . '"'; //First First way
 //$v = "t{$v}"; //Second way
}
return $v;
}