- Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
- '1', '2'
<?php
$str = "1,1,2,2,2,";
$string = rtrim($str, ',');
$result = implode("', '", array_unique(explode(',', $string)));
$result = "'$result'";
echo $result;