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@ 2017-03-22T14:14:21Z

<?php

$daftar_penumpang =["sandhika",null,"carl","keith"];

array_walk($daftar_penumpang, function($v, $k, $prefix) use (&$daftar_penumpang) {
    if ($v == null) {
        $daftar_penumpang[$k] = $prefix;
    }
}, 'test');

print_r($daftar_penumpang);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
array_walk: documentation ( source)

preferences:dark modelive previewkey bindings

157.37 ms | 405 KiB | 5 Q