Merge two arrays, replacing values of same key - php

Question

I have two arrays
First Array
(
[0] => Array
(
[352] => 1
[128] =>
[64] =>
[70] => 2
)
)
Second array is like this :
Array
(
[0] => Array
(
[128] => 1.5
)
)
I want to make final array like this.(i want to store the matching into the main array in this example it is 128 -> 1.5) how can i do it.?
Array
(
[0] => Array
(
[352] => 1
[128] => 1.5
[64] =>
[70] => 2
)
)
here is my array variables:
print_r($listskilssresult);
print_r($listskilssresultmatching);

Answer 1

You need to use array_replace_recursive
$listskilssresult = [
[
352 => 1,
128 => '',
64 => '',
70 => 2
]
];
$listskilssresultmatching = [
[
128 => 1.5
]
];
print_r(array_replace_recursive($listskilssresult, $listskilssresultmatching));
Prints :
Array
(
[0] => Array
(
[352] => 1
[128] => 1.5
[64] =>
[70] => 2
)
)
Know the difference between array_replace_recursive and array_merge_recursive here

Answer 2

This is specific to your question. If you want to make something more automated, you can create a function. But this will do what you want:
<?php
$array1 = [[352 => 1, 128 => null, 64 => null, 70 => 2]];
$array2 = [[128 => 1.5]];
$keys1 = array_keys($array1[0]);
$keys2 = array_keys($array2[0]);
foreach ($keys1 as $key => $value) {
if (in_array($value, $keys2)) {
$array1[0][$value] = $array2[0][$value];
unset($array2[0][$value]);
}
}
if (!empty($array2[0])) {
foreach ($array2[0] as $key => $value) {
$array1[0][$key] = $value;
unset($array2[0][$key]);
}
}
print_r($array1[0]);
?>
The last if statement will add key + value from the 2nd array to the first if no match was found for them (from the foreach statement). You can just delete that condition if you just want to add only matching keys.

Answer 3

For this solution, you have to use array_merge() built-in php function.
Syntax:
$finalArray = array_merge($array1, $array2);
print_r($finalArray)
Example:
$array1 = array("color" => "red", 2, 4);
$array2 = array("a", "b", "color" => "green", "shape" => "trapezoid", 4);
$result = array_merge($array1, $array2);
print_r($result);
Output:
Array
(
[color] => green
[0] => 2
[1] => 4
[2] => a
[3] => b
[shape] => trapezoid
[4] => 4
)
Reference : http://php.net/manual/en/function.array-merge.php

Answer 4

array_replace_recursive is the best solution!
$old_array = Array('my_index1' => Array('1' => 'A', '2' => 'B'), 'my_index2' => Array('1' => 'C', '2' => 'D'));
$new_array = Array('my_index2' => Array('2' => 'Z'));
$result = array_replace_recursive($old_array, $new_array);
//Result : Array('my_index1' => Array('1' => 'A', '2' => 'B'), 'my_index2' => Array('1' => 'C', '2' => 'Z'));

Answer 5

array_merge would do the job for you:
array_merge($listskilssresult,$listskilssresultmatching)