php arrays to CSV

Question

I have an array of arrays

$numbers= array(3) {
  [months]=>
    array(3) {
      ["1"]=>
      string(7) "Jan"
      ["2"]=>
      string(7) "Feb"
     ["3"]=>
     string(7) "Mar"
  }
[dates]=>
  array(3) {
    ["1"]=>
    string(7) "12th"
    ["2"]=>
    string(7) "19th"
    ["3"]=>
    string(7) "22nd"
 }
  [people]=>
  array(3) {
    ["1"]=>
    string(7) "Bill"
    ["2"]=>
    string(7) "Ted"
    ["3"]=>
    string(7) "Gary"
 }
 }

I want to write the contents of these arrays into a CSV file in the form of a table so I get an output like:

 months,  dates, people 
 Jan,     12th,   Bill
 Feb,     19th,   Ted
 Mar,     22nd,   Gary

I want to try and put it directly from the array into the CSV in one move it it's possible but I can't find a way to do it without cutting it up.

Answer 1

$mi = new MultipleIterator();
$headers = array();
foreach($numbers as $header => $data) {
    $mi->attachIterator(new ArrayIterator($data));
    $headers[] = $header;
}

$fh = fopen('myfile.csv', 'w');
fputcsv($fh, $headers);
foreach($mi as $values) {
    fputcsv($fh, $values);
}
fclose($fh);

Answer 2

<?php
// transform the array
$keys = array_keys($numbers);
array_unshift($numbers, null);
$output = call_user_func_array('array_map', $numbers);
array_unshift($output, $keys);

// from php.net
$fp = fopen('file.csv', 'w');

foreach ($output as $fields) {
    fputcsv($fp, $fields);
}

fclose($fp);