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@ 2016-04-28T15:24:31Z

<?php
function foo (string &...$in): string {
    return implode(', ', $in);
}

$x = 1;
$y = 2;
$z = 3;
echo foo($x, $y, $z);

Output
Performance
VLD
References
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implode: documentation ( source)

preferences:dark modelive preview

14.46 ms | 404 KiB | 5 Q