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@ 2020-09-20T10:33:44Z

<?php

$my_array = [
    "keywords" => "test",
    "locationId" => [ 0 => "1", 1 => "2"],
    "industries" => "1"
];
    
foreach ($my_array as &$v) {
    $v = implode(',', (array)$v);
}

var_export($my_array);

Output
Performance
VLD
References
Branches

var_export: documentation ( source)
implode: documentation ( source)

preferences:dark modelive previewkey bindings

29.61 ms | 405 KiB | 5 Q