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@ 2013-11-24T22:48:18Z

<?php

function dummy($s = null)
{
    return $s;
}

$var = (dummy("test") ?: "empty");
var_dump($var);

$var = (dummy() ?: "empty");
var_dump($var);

Output
Performance
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var_dump: documentation ( source)

preferences:dark modelive preview

45.1 ms | 402 KiB | 5 Q