Converting/Mapping Keys to Values in Array in PHP

Question

I have the following array

    $fieldValues = [
        'brand' => 'brand_id',
        'mobile' => 'mobile',
        'customer' => 'customer_id',
        'points_value' => 'points'
    ];

Here is my field array which should get values from keys;

$fields = ['brand','points_value'];

So, here the output should be.

$fields = ['brand_id','points'];

I can create a function to convert them into values but just wanted to check if there is any function which can help me with it? I tried array_flip code but bad luck.

Kevin · Accepted Answer · 2015-04-03 10:50:53Z

1

I don't think there is a single function that does that. However, a combination of array_flip and array_intersect_key does it:

$result = array_values(array_intersect_key($fieldValues, array_flip($fields)));
print_r($result);

Sidenote: If you want the keys preserved, then just remove the array_values. This just turns the resultant array into numeric indexed.

Or just plain ol' foreach should also suffice:

$result = [];
foreach($fields as $key) {
    if(isset($fieldValues[$key])) {
        $result[] = $fieldValues[$key];
    }
}
print_r($result);

answered Apr 3, 2015 at 10:50

Kevin

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