如何根据索引 php 合并两个 arrays？

Question

I need to merge 2 arrays and i have found lot of examples here on stackoverflow, but nothing has worked for me, in my case, so i explain my case:

Arrays (can be one, two, or three, or more...):

Array ( [0] => name-file_icon_001_00.png- 
        [1] => name-file_icon_002_00.png-
        [2] => name-file_icon_003_00.png- )
Array ( [0] => rel
        [1] => rel
        [2] => rel )

Or can be two:

Array ( [0] => name-file_icon_001_00.png- 
        [1] => name-file_icon_002_00.png- )
Array ( [0] => rel
        [1] => rel )

Or one:

Array ( [0] => name-file_icon_001_00.png- ) 
Array ( [0] => rel )

Need to insert the relative value " [0] => rel " with " [0] => name-file_icon_001_00.png- "

Expected result (merged):

Array ( [0] => name-file_icon_001_00.png-rel
        [1] => name-file_icon_002_00.png-rel
        [2] => name-file_icon_003_00.png-rel )

Reading around the web, seems that not exist a native function for make this. Please, hope in your help:)

Answer 1

A simple foreach loop using the index and value parameters will do it in no time

Example

$a1 = ['name-file_icon_001_00.png-',
        'name-file_icon_002_00.png-',
        'name-file_icon_003_00.png-'
        ];
$a2 = ['rel1','rel2','rel3'];

foreach ($a1 as $i => $v){
    $new[] = $v . $a2[$i];
}
print_r($new);

RESULT

Array
(
    [0] => name-file_icon_001_00.png-rel1
    [1] => name-file_icon_002_00.png-rel2
    [2] => name-file_icon_003_00.png-rel3
)

Answer 2

You can map each array to a function that concatenates them:

$result = array_map(function($a, $b) { return $a.$b; }, $one, $two);

If you define one array with subarrays then you can unpack that array ... :

$array = [$one, $two];
$result = array_map(function($a, $b) { return $a.$b; }, ...$array);

Or for fun, you can extract each column from the subarrays and implode them:

$array = [$one, $two];
for($i=0; $a=array_column($array, $i); $i++) {
    $result[] = implode($a);
}