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@ 2017-06-19T10:53:43Z

<?php

$in = [
    [ 'id' => 352, 'name' => 'a' ],
    [ 'id' => 438, 'name' => 'b' ],
    [ 'id' => 351, 'name' => 'c' ],
];

$out = array_map(function ($arr) {
    $arr['selected'] = null;
    return $arr;
}, $in);

print_r($out);

Output
Performance
VLD
References
Branches

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

preferences:dark modelive previewkey bindings

167.02 ms | 406 KiB | 5 Q