Let's say I have following arrays:
Array
(
[2001] => Array
(
[event_detail] => Array
(
[1] => Array
(
[event_name] => Advocacy CPD 2019
[cpd_points] => 23
)
[5] => Array
(
[event_name] => Advocacy CPD 2019 new
[cpd_points] => 2
)
)
)
[2002] => Array
(
[event_detail] => Array
(
[2] => Array
(
[event_name] => Advocacy CPD 2011
[cpd_points] => 28
)
[4] => Array
(
[event_name] => Advocacy CPD 20195 new
[cpd_points] => 12
)
)
)
)
And the second one:
Array
(
[2001] => Array
(
[event_detail] => Array
(
[1] => Array
(
[event_name] => Advocacy CPD 2020
[cpd_points] => 27
)
)
)
[2052] => Array
(
[event_detail] => Array
(
[2] => Array
(
[event_name] => Advocacy CPD 2052
[cpd_points] => 258
)
[4] => Array
(
[event_name] => Advocacy CPD 2019445 new
[cpd_points] => 78
)
)
)
)
And desired output is:
Array
(
[2001] => Array
(
[event_detail] => Array
(
[1] => Array
(
[event_name] => Advocacy CPD 2019
[cpd_points] => 23
)
[5] => Array
(
[event_name] => Advocacy CPD 2019 new
[cpd_points] => 2
)
[6] => Array
(
[event_name] => Advocacy CPD 2020
[cpd_points] => 27
)
)
)
[2002] => Array
(
[event_detail] => Array
(
[2] => Array
(
[event_name] => Advocacy CPD 2011
[cpd_points] => 28
)
[4] => Array
(
[event_name] => Advocacy CPD 20195 new
[cpd_points] => 12
)
)
)
[2052] => Array
(
[event_detail] => Array
(
[2] => Array
(
[event_name] => Advocacy CPD 2052
[cpd_points] => 258
)
[4] => Array
(
[event_name] => Advocacy CPD 2019445 new
[cpd_points] => 78
)
)
)
)
The problem is I would like to merge these arrays on the same id[2001,2005,2002]. Desired output sorting should be the same as in the first array.
I have managed to merge these arrays with different way but failed:
How can I achieve this? Any help is much appreciated.
Pretty simple, just loop the second array and merge using the key to the first array:
foreach($array2 as $key => $val) {
$array1[$key]['event_detail'] = array_merge($array1[$key]['event_detail'],
$val['event_detail']);
}