Overwrite subarrays in one multidimensional array if different from another multidimensional array - php

Question

I stuck on this and really don't know how to solve it.
I have two multi-dimensional arrays and need to match every "entry_id" from second array with first one. Then need to check if every "file_no" from second array is in database (first array) and "status" are matched with 1st array . If "status" is different, update second array with string (e.g. updated value) like this:
...
[status] => Array
(
[0] => abc
[1] => defghijk - "updated value"
)
So I have first array from database:
Array
(
[0] => Array
(
[entry_id] => 1
[file_no] => KSBR 40 INS 3674 / 2014
[status] => abc
)
[1] => Array
(
[entry_id] => 9
[file_no] => KSUL 77 INS 18898 / 2013
[status] => abc
)
[2] => Array
(
[entry_id] => 9
[file_no] => KSUL 77 INS 21218 / 2013
[status] => defg
)
)
And second array generated from script:
Array
(
[0] => Array
(
[entry_id] => 1
[id] => 500910/098
[fullname] => Milan Vrtal
[type] => person
[file_no] => Array
(
[0] => KSBR 26 INS 37146 / 2013
[1] => KSBR 40 INS 3674 / 2014
)
[status] => Array
(
[0] => status1
[1] => status2
)
)
[1] => Array
(
[entry_id] => 2
[id] => 46900217
[fullname] => ENTEC a.s.
[type] => company
[file_no] => Array
(
[0] => KSBR 28 INS 1232 / 2013
)
[status] => Array
(
[0] => qwer
)
)
[2] => Array
(
[entry_id] => 9
[fullname] => Blanka Kořínková
[type] => person
[file_no] => Array
(
[0] => KSUL 77 INS 18898 / 2013
[1] => KSUL 77 INS 21218 / 2013
)
[status] => Array
(
[0] => abc
[1] => defghijk
)
)
)
Thanks for every comment and sorry for english :)

Answer 1

This is by creating a temporary array to search in. This will use quite some memory when the arrays are big, but will result in faster execution time...
$tmparr = array();
foreach($arr1 as $arr1_val)
{
//put an new element in $temparr with key 'entry_id' and an array as value
if (!isset($tmparr[$arr1_val['entry_id']]))
$tmparr[$arr1_val['entry_id']] = array();
//add the status to the array
$tmparr[$arr1_val['entry_id']][] = $arr1_val['status'];
}
/*
$tmparr = Array
(
[1] => Array
(
[0] => abc
)
[9] => Array
(
[0] => abc
[1] => defg
)
)
*/
//arr2_val by reference so that we can change it
foreach($arr2 as &$arr2_val)
{
//get the current entry_id
$entry_id = $arr2_val['entry_id'];
//see if this entry_id was in the first array, and if so...
if (isset($tmparr[$entry_id]))
{
//change the status to both the original status and the status of the first array
$arr2_val['status'] = array_merge($arr2_val['status'],$tmparr[$entry_id]);
}
}
print_r($arr2);
Output:
Array
(
[0] => Array
(
[entry_id] => 1
[id] => 500910/098
[fullname] => Milan Vrtal
[type] => person
[file_no] => Array
(
[0] => KSBR 26 INS 37146 / 2013
[1] => KSBR 40 INS 3674 / 2014
)
[status] => Array
(
[0] => status1
[1] => status2
[2] => abc
)
)
[1] => Array
(
[entry_id] => 2
[id] => 46900217
[fullname] => ENTEC a.s.
[type] => company
[file_no] => Array
(
[0] => KSBR 28 INS 1232 / 2013
)
[status] => Array
(
[0] => qwer
)
)
[2] => Array
(
[entry_id] => 9
[fullname] => Blanka Kořínková
[type] => person
[file_no] => Array
(
[0] => KSUL 77 INS 18898 / 2013
[1] => KSUL 77 INS 21218 / 2013
)
[status] => Array
(
[0] => abc
[1] => defghijk
[2] => abc
[3] => defg
)
)
)
edit: This is possible too, whitout the temp array, but with a loop in a loop. This will be slower than the first one, but will consume less memory:
//arr2_val by reference so that we can change it
foreach($arr2 as &$arr2_val)
{
//get the current entry_id
$entry_id = $arr2_val['entry_id'];
//search for the correct row in the first array
foreach($arr1 as $arr1_val)
{
if ($arr1_val['entry_id'] == $arr2_val['entry_id'])
{
$arr2_val['status'][] = $arr1_val['status'];
//a continue should be added here to make it faster...
}
}
}
print_r($arr2);

Answer 2

This should work
foreach($array1 as $i)
{
foreach($array2 as $key=>$j)
{
if($j['entry_id'] == $i['entry_id'])
{
if($array2[$key]['status'] != $i['status'])
{
$j['status'] = array(
$i['status'],
$j['status'] // the new status
);
}
continue;
}
}
}

Answer 3

I found a solution for you :
$a1 = [['entry_id' => 1, 'file_no' => 'KSBR', 'status' => 'abc'], ['entry_id' => 2, 'file_no' => 'KSUL', 'status' => 'defg']];
$a2 = [['entry_id' => 1, 'file_no' => 'KSBR', 'status' => 'abc', 'type' => 'person'], ['entry_id' => 2, 'file_no' => 'KSUL', 'status' => 'defg']];
print_r(new_array_merge_recursive($a1, $a2));
function new_array_merge_recursive(array $array1, array $array2=array())
{
$arrays = func_get_args();
$merge = array_shift($arrays);
foreach ($arrays as $array)
{
foreach ($array as $key => $val)
{
if (is_array($val) && array_key_exists($key, $merge))
{
$val = new_array_merge_recursive((array) $merge[$key], $val);
}
$merge[$key] = $val;
}
}
return $merge;
}