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@ 2019-02-13T09:24:12Z

<?php

$a = [
    ["userid" => 1],
    ["userid" => 2],
    ["userid" => 3],
];

$a = array_map("array_flip", $a);

print_r($a);

Output
Performance
VLD
References
Branches

array_map: documentation ( source)
print_r: documentation ( source)

preferences:dark modelive previewkey bindings

31.41 ms | 405 KiB | 5 Q