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@ 2018-06-28T16:57:09Z

<?php

$gene_symbol = null;
$variant_type = 'some';
var_dump(compact('gene_symbol', 'variant_type'));
var_dump(compact('variant_type', null));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
compact: documentation ( source)

preferences:dark modelive preview

41.22 ms | 402 KiB | 5 Q