Merging array with same keys indexes depends number of same keys - php

Question

$groupLevelOne = array();
foreach ($data['display'] as $item) {
$key = implode($data['data'][$i]['eid'])
.date('Y-m',strtotime($item['date_d'][0]));
if (!isset($groupLevelOne[$key])) {
$groupLevelOne[$key] = array(
'employeeId' => $data['data'][$i]['eid'],
'efullname' => $item['fullname'][0],
'date_d' => date('Y-m',strtotime($item['date_d'][0])),
'hrsdiff' => $item['hrsdiff'][0],
'dayspresent' => $item['key'][0],
);
}
else {
$groupLevelOne[$key]['dayspresent'] = $groupLevelOne[$key]['dayspresent'] + $item['key'][0];
}
$i++;
}
Already have this code displaying this they are group with same id's and dates
Array
(
[12014-01] => Array
(
[employeeId] => Array
(
[0] => 1
)
[efullname] => IBARDOLAZA VIRGILIO
[date_d] => 2014-01
[hrsdiff] => 5.0333
[dayspresent] => 2
)
[12014-02] => Array
(
[employeeId] => Array
(
[0] => 1
)
[efullname] => IBARDOLAZA VIRGILIO
[date_d] => 2014-02
[hrsdiff] => 8.0333
[dayspresent] => 24
)
[12014-03] => Array
(
[employeeId] => Array
(
[0] => 1
)
[efullname] => IBARDOLAZA VIRGILIO
[date_d] => 2014-03
[hrsdiff] => 8.0667
[dayspresent] => 26
)
)
And what to have my next level op groupings to be merge with the same employeeID and different idexes of dates that will be 1 array that look like this
[1] => Array
(
[employeeId] => Array
(
[0] => 1
)
[efullname] => IBARDOLAZA VIRGILIO
[date_d1] =>2014-01
[dayspresent1] => 2
[date_d2] =>2014-02
[dayspresent2] => 24
[date_d3] =>2014-03
[dayspresent3] => 26
)
------------ follow up question -------------
[0] => Array
(
[employeeId] => 21
[efullname] => MANOGURA EDGAR
[hrsdiff] => 2.2331
[days] => Array
(
[2014-02] => 23
[2014-03] => 26
[2014-04] => 23
)
)
[1] => Array
(
[employeeId] => 1
[efullname] => IBARDOLAZA VIRGILIO
[hrsdiff] => 5.0333
[days] => Array
(
[2014-01] => 2
[2014-02] => 24
[2014-03] => 26
[2014-04] => 26
)
)
i want my first index to have [2014-01] => 0
so they will have all same days index

Answer 1

You could do all of this in a single run:
$groups = array();
foreach ($data['display'] as $item) {
$eid = implode($data['data'][$i]['eid']);
$date = date('Y-m',strtotime($item['date_d'][0]));
if (!isset($groups[$eid])) {
$groups[$eid] = array(
'employeeId' => $eid,
'efullname' => $item['fullname'][0],
'hrsdiff' => $item['hrsdiff'][0],
'days' => array(
$date => $item['key'][0],
)
);
} else {
#$groups[$eid]['days'][$date] += $item['key'][0];
}
}