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@ 2018-10-26T20:12:59Z

<?php

function test($id = null)
{
    if (!$id) {
        return false;
    }
    
    $getArg = $id;
    if ($getArg (is_numeric($getArg) || $getArg === 'test')) {
        return true;
    }
    
    return false;
}

var_dump(test('1'));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
is_numeric: documentation ( source)

preferences:dark modelive preview

49.41 ms | 402 KiB | 5 Q