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@ 2017-07-07T08:19:48Z

<?php

$array = array("FFF" => '1',22,54,75,"boo" => '90',364);
$keys = array_keys($array);

Var_dump($keys);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
array_keys: documentation ( source)

preferences:dark modelive preview

40.43 ms | 402 KiB | 5 Q