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@ 2017-07-13T07:08:17Z

<?php

$arr=[];
function addToArray($arr,$val)
{
    array_push($arr,["order_id"=>$val]);
}
addToArray($arr,"1234");
print_r($arr);
?>

Output
Performance
VLD
References
Branches

array_push: documentation ( source)
print_r: documentation ( source)

preferences:dark modelive preview

41.31 ms | 402 KiB | 5 Q