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@ 2019-01-21T02:48:10Z

<?php

function hereGo(int $id = null){
    if($id){
     echo "we are here";    
    }    
}

var_dump(hereGo('e'));

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

34.39 ms | 402 KiB | 5 Q