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@ 2014-05-15T07:24:59Z

<?php
$s1 = "a";
$s2 = "b";
$s3 = null;

echo implode(", ", array($s1, $s2, $s3));
?>

Output
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implode: documentation ( source)

preferences:dark modelive preview

55.27 ms | 402 KiB | 5 Q