比较并将值替换为另一个数组

Question

I have the following arrays:

$files = ['376840000000367020', '376840000000375036', '376840000000389001'];
$arr   = [];

foreach ($files as $key => $name) {
    $arr[] = $name;
}

$data = [
    '376840000000367020' => '5782',
    '376840000000375036' => '5783',
    '376840000000389001' => '5784',
];

print_r($arr);

This returns:

Array ( [0] => 376840000000367020 [1] => 376840000000375036.... )

I want to compare 2 arrays $arr and $data if the $key is found in $arr replace value with the $data, I'm trying get following output:

Array ( [0] => 5782 [1] => 5783 .... )

I have lots of data to compare so its not ideal to iterate over $arr inside foreach.

How would i go about doing this?

Answer 1

You can use array_key_exists function to check a key exists in array:

<?php

$files = ['376840000000367020','376840000000375036','376840000000389001'];

$data = array(
    '376840000000367020'  =>  '5782',
    '376840000000375036'  =>  '5783',
    '376840000000389001'  =>  '5784',
);

$arr = [];
foreach($files as $key=>$name){
    if(array_key_exists($name, $data)) {
        $arr[] = $data[$name];
    }
}


print_r($arr);