Merge array values for same keys inside loop with php - php

Question

Going through foreach loop for filter on my site I get array back like this:
Array
(
[21] => Blau
[24] => Azul
[28] => Blue
)
By choosing next filter another array will be created:
Array
(
[21] => Grün
[24] => Verde
[28] => Green
)
and so on...
What I what to do is merge values of these arrays on same keys. So it have to be look like this:
Array
(
[21] => Blau-Grün
[24] => Azul-Verde
[28] => Blue-Green
)
It worked with Uchiha's code. I made some changed inside my loop:
foreach (...){
//some logic before
$array[] = array();
$i = 0;
foreach($array as $k => $v){
$i++;
foreach($array[$k] as $key => $value){
if(array_key_exists($key, $array[$i])){
$result[$key] = $value . '-' . $array[$i][$key];
}
}
}
echo '<pre>' . print_r($result,true) . '</pre>';
}

Answer 1

$maxItems = max(count($blue),count($green));
for ($i = 0; $i < $maxItems; $i++) {
if (isset($blue[$i], $green[$i])) {
$combined[$i] = $blue[$i].'-'.$green[$i];
} else {
if (isset($blue[$i])) {
$combined[$i] = $blue[$i];
} else {
$combined[$i] = $green[$i];
}
}
}

Answer 2

You can use foreach along with array_key_exists as
foreach($arr1 as $key => $value){
if(array_key_exists($key, $arr2)){
$result[$key] = $value.'-'.$arr2[$key];
}
}
Fiddle

Answer 3

you can use array_map with a closure that joins the two values, e.g.
$joined = array_map(function($m, $n){ return $m . '-' . $n; }, $array1, $array2);

Answer 4

$foo = array(1 => "Bob", 2 => "Sepi");
$bar = array(1 => "sach", 2 => "john");
$foobar= array();
foreach ($foo as $key => $value) {
foreach ($bar as $key1 => $value1) {
if($key == $key1){
$foobar[] = $value."-".$value1;
}
}}

Answer 5

You can create a function, which takes both of arrays as parameter and identify which one has more elements, loop through and concat the string from another array at the same key.
$array1 = array(
'Blau',
'Azul',
'Blue'
);
$array2 = array(
'Grün',
'Verde',
'Green'
)
function mergeArray($array1, $array2){
$newArray = array();
if(count($array1) >= count($array2)){
foreach($array1 as $key => $value){
$newArray[] = $value . (array_key_exists($key, $array2) ? '-' . $array2[$key] : '');
}
} else {
foreach($array2 as $key => $value){
$newArray[] = $value . (array_key_exists($key, $array1) ? '-' . $array1[$key] : '');
}
}
}
$newArray = mergeArray($array1, $array2);
$newArray contains the result you expected.

Answer 6

here is simple and tested code
<?php
$a1=array(
1 => 'Blau',
2 => 'Azul',
3 => 'Blue'
);
$a2=array
(
1 => 'Grün',
2 => 'Verde',
4 => 'Green'
);
$a3=$a1 + $a2;
$a4=$a2 + $a1;
foreach($a3 as $key=>$val){
if($a4[$key] != $a3[$key]){
$a3[$key] = $a3[$key].' '.$a4[$key];
}
}
print_r($a3);
?>