php merge 2 arrays into one associative array - php

Question

Using PHP I need to merge 2 arrays (of equal length into one associative array) here is an excerpt from my current data set:
[1] => Array
(
[0] => C28
[1] => C29
)
[2] => Array
(
[0] => 1AB010050093
[1] => 1AB008140029
)
both elements [1] and [2] are actually a lot longer than just 2 sub-elements (like I said, this is an excerpt).
The deal is that "C28" in the first array corresponds to "1AB010050093" in the second array, and so on... The result I need is to create a new associative array that looks like this:
[1] => Array
(
['ref'] => C28
['part'] => 1AB010050093
)
[2] => Array
(
['ref'] => C29
['part'] => 1AB008140029
)
and so on...

Answer 1

If you are willing to compromise with an array structure like this:
array(
'C28' => '1AB010050093',
'C29' => '1AB008140029'
);
Then you can use the array_combine() (Codepad Demo):
array_combine($refNumbers, $partIds);
Otherwise, you'll need to use a foreach (Codepad Demo):
$combined = array();
foreach($refNumbers as $index => $refNumber) {
if(!array_key_exists($index, $partIds)) {
throw OutOfBoundsException();
}
$combined[] = array(
'ref' => $refNumber,
'part' => $partIds[$index]
);
}

Answer 2

If you're using PHP 5.5+, there is a new method called array_column(), which will get all of the values in a particular column. That could potentially be used, although I think just a simple foreach loop will probably still be your best bet.

Answer 3

How about:
$arr1 = array(
0 => 'C28',
1 => 'C29',
);
$arr2 = array(
0 => '1AB010050093',
1 => '1AB008140029',
);
$result = array();
for ($i=0; $i<count($arr1); $i++) {
$result[] = array('ref' => $arr1[$i], 'part' => $arr2[$i]);
}
print_r($result);
ouptut:
[1] => Array
(
[0] => C28
[1] => C29
)
[2] => Array
(
[0] => 1AB010050093
[1] => 1AB008140029
)