How to combine inner array values in one multidimensional array? - php

Question

Hi I have one multidimensional array, I retrieved the data using mysql PDO and formatted it this way
array('id'=>$row['empname'],'data'=>array(array($row['salestat'],$row['salecount'])))
Array
(
[0] => Array
(
[id] => 'employee1'
[data] => Array
(
0 => 'Sold'
1 => 1
)
)
[1] => Array
(
[id] => 'employee2'
[data] => Array
(
0 => 'On Process'
1 => 4
)
)
[2] => Array
(
[id] => 'employee2'
[data] => Array
(
0 => 'Sold'
1 => 2
)
)
)
I am trying to make my output like this, trying to format this so I can use it for drilldown series in highcharts, thank you
Array
(
[0] => Array
(
[id] => 'employee1'
[data] => Array
(
0 => 'Sold'
1 => 1
)
)
[1] => Array
(
[id] => 'employee2'
[data] => Array
[0]
(
0 => 'On Process'
1 => 4
)
[1]
(
0 => 'Sold'
1 => 2
)
)
)

Answer 1

Firstly, you can not use a field inside an array twice with the same key like salescount or salestat. But you can do something like this.
function wrapSameId( $employeeArray ) {
//create the new array.
$newEmployeeArray = array();
//loop the old array.
foreach ($employeeArray as $key => $value) {
$exists = 0;
$i=0;
$id = $value['id'];
$data = $value['data'];
//see if you can find the current id inside the newly created array if you do, only push the new data in.
foreach ($newEmployeeArray as $key2 => $value2) {
if( $id == $value2['id'] ) { $newEmployeeArray[$key2]['data'][] = $data;$exists = 1;var_dump($value2['data']); }
$i++;
}
//if we didnt find the id inside the newly created array, we push the id and the new data inside it now.
if( $exists == 0 ){
$newEmployeeArray[$i]['id'] = $id;
$newEmployeeArray[$i]['data'][] = $data;
}
}
return $newEmployeeArray;
}
This function should return a new Array but if in the old array there were multiple arrays with the same id, in this one we should have:
Array
(
[0] => Array
(
[id] => employee1
[data] => Array
(
[0] => Array
(
[salescount] => 4
[salesstat] => Sold
)
)
)
[1] => Array
(
[id] => employee2
[data] => Array
(
[0] => Array
(
[salescount] => 2
[salesstat] => In Progress
)
[1] => Array
(
[salescount] => 5
[salesstat] => Sold
)
)
)
)
You can use it like this:
$employees = wrapSameId( $PDOArray );
where $PDOArray is your initial Array. Hope this is what you were looking for.

Answer 2

Why not index your output array by id?
Loop over your initial array and add the salecount, salestat pair to an employee's data array.
$outputArray = array();
//Loop over each entry pulled from you database...
foreach ($employeeArray as $employeeInfo)
{
//If no index for the current employee exists, create an empty array
//The only reason I'm including this is because I'm not sure how array_merge handles nulls -- just to be safe
if (!$outputArray[$employeeInfo['id']])
{
$outputArray[$employeeInfo['id']] = array();
}
//Merge the existing array for that employee with the new data for the same employee
$outputArray[$employeeInfo['id']] = array_merge($outputArray[$employeeInfo['id']], $employeeInfo['data']);
}
print_r($outputArray);
It's easier to visualize the output...
Array
(
[employee1] => Array
(
0 => 1
1 => 'Sold'
)
[employee2] => Array
(
0 => 4
1 => 'On Process'
2 => 2
3 => 'Sold'
)
)
If you're not satisfied with your output being indexed by id, loop over it again and format it as you want.
$otherOutputArray = array();
foreach ($outputArray as $key => $value)
{
$otherOutputArray[] = array('id' => $key, 'data' => $value);
}
That gives you exactly what you want.