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@ 2021-04-07T12:21:57Z

<?php

$colours = array("Red", "Blue", "Green");
$string = "There are three Red and Green walls.";

echo preg_replace("/\b(?:" . implode('|', $colours) . ")\b/", '%1%$0%2%', $string);

Output
Performance
VLD
References
Branches

implode: documentation ( source)
preg_replace: documentation ( source)

preferences:dark modelive previewkey bindings

31.18 ms | 405 KiB | 5 Q