Convert array into simple 1 level array in PHP

Question

A simple thing to do, but I forgot how to convert

Array
(
    [0] => Array
        (
            [hashcode] => 952316176c1266c7ef1674e790375419
                


        

Answer 1

$source = array(
    array(
        'hashcode' => '952316176c1266c7ef1674e790375419'
    ),
    array(
        'hashcode' => '5b821a14c98302ac40de3bdd77a37ceq'
    )
);

$result = array();
array_walk($source, function($element) use(&$result){
    $result[] = $element['hashcode'];
});

echo '
';
var_dump($result);