Convert multidimensional array with differing keys to csv with headers - php

Question

I have a multidimensional array of data that is presented as follows:
Array
(
[0] => Array
(
[CallID] => 793415338
[StartTime] => 2016-10-04 17:21:53
[CallingNo] => [phone]
[queue1_time] => 94
)
[1] => Array
(
[CallID] => 1718936847
[StartTime] => 2016-10-04 17:29:41
[CallingNo] => [phone]
[queue1_time] => 64
[queue2_time] => 96
)
[2] => Array
(
[CallID] => 497342634
[StartTime] => 2016-10-04 17:34:57
[CallingNo] => [phone]
[queue4_time] => 47
)
[3] => Array
(
[CallID] => 1298245252
[StartTime] => 2016-10-04 17:35:33
[CallingNo] => [phone]
[queue1_time] => 5
)
[4] => Array
(
[CallID] => 1214106933
[StartTime] => 2016-10-04 17:35:38
[CallingNo] => [phone]
[queue1_time] => 53
[queue2_time] => 31
)
....
)
I would like to parse all of the data in this array and convert it to a csv with a header above each set of array values that have matching complete key sets. Output would look like the following:
CallID,StartTime,CallingNo,queue1_time
793415338,2016-10-04 17:21:53,+15555555555,94
1298245252,2016-10-04 17:35:33,+15555555558,5
CallID,StartTime,CallingNo,queue1_time,queue2_time
1718936847,2016-10-04 17:29:41,+15555555556,64,96
1214106933,2016-10-04 17:35:38,+15555555559,53,31
CallID,StartTime,CallingNo,queue4_time
497342634,2016-10-04 17:34:57,+15555555557,47
Any further tips or tricks to shorten this code would be greatly appreciated!

Answer 1

I was able to get this functional with the following code but I am guessing there is a simpler more efficient method to perform this task:
$key_array = array();
foreach (array_keys($overflow_array) as $paramName){
foreach ($overflow_array[$paramName] as $key => $value){
$key_array[$paramName][] = $key;
}
}
$key_array = array_map("unserialize", array_unique(array_map("serialize", $key_array)));
function array_keys_exist($keys, $array){
if (count($keys) != count($array)){
return false;
}
foreach($keys as $num => $key){
if(!array_key_exists($key, $array))return false;
}
return true;
}
$output = fopen('php://temp/maxmemory:1048576', 'w');
if($output === FALSE) {
die('Failed to open temporary file');
}
foreach ($key_array as $keyset => $value){
$keys = array_values($value);
fputcsv($output, $keys);
foreach ($overflow_array as $oflow => $oflow_key){
if (array_keys_exist($keys, $overflow_array[$oflow]) == true){
fputcsv($output, $overflow_array[$oflow]);
}
}
}
rewind($output);
$csv = stream_get_contents($output);
fclose($output);
print_r($csv);