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@ 2015-03-02T13:02:23Z

<?php

function displayR($a, $b) {
    return implode(' ', [$a, $b]);
}

$i = 1;
$sR1S1 = 'Hello';
$nR1S1P = 'World';

echo displayR(${"sR{$i}S1"}, ${"nR{$i}S1P"});

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implode: documentation ( source)

preferences:dark modelive preview

56.65 ms | 402 KiB | 5 Q