How to match keys from one array to another, and return keys from the other [closed]

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I have 2 arrays, I would like to use the keys from the 1st array to search for matched keys from the 2nd array and return those keys from the 2nd array with the values ​​of the second array.

expected result: Array ( 'Intermediary/contract/{contract:id}/bank-accounts'[2] 'Manager/action/{action:id}/bank-bills'[2] )

 $arrayOne = [ 

 '/Intermediary/contract//bank-accounts'[2]
 '/Manager/action//bank-bills'[2]]

  $arrayTwo = [

 '/Intermediary/contract/{contract:id}/bank-accounts',
 '/Manager/action/{action:id}/bank-bills',
  ]

So far I've tried, among others,

foreach ($array1 as $key => $value) {

    $results = preg_grep('/$key/', $array2);
    }

回答1:

Those are values and not keys in your example arrays.

First get rid of all of the {.....} from $arrayTwo and compute the intersection (same entries) with $arrayOne. Since the keys are preserved in the array that has been replaced you can compute the intersection of keys with $arrayTwo:

$result = array_intersect_key(
    array_intersect(preg_replace('/\{[^}]+\}/', '', $arrayTwo), $arrayOne),
    $arrayTwo
);

Here's a Demo.

If you really need the keys then the answer is slightly different getting the keys as an array:

$result = array_intersect_key(
    array_keys($arrayTwo),
    array_intersect(preg_replace('/\{[^}]+\}/', '', array_keys($arrayTwo)),
                                                    array_keys($arrayOne))
);

Here's a Demo.

To do it with a loop:

foreach($arrayTwo as $k => $v) {
    if(in_array(preg_replace('/\{[^}]+\}/', '', $k), array_keys($arrayOne))) {
        $result[] = $k;
    }
}

If for whatever reason you need them as keys again, there is array_flip.

来源：https://stackoverflow.com/questions/60935815/how-to-match-keys-from-one-array-to-another-and-return-keys-from-the-other