3v4l.org

run code in 300+ PHP versions simultaneously
<?php $key = "translations.fr.idTranslation"; $value = 4; $keys = explode('.', $key); $x = count($keys) - 1; $temp = array($keys[$x] => $value); for($i = $x-1; $i >= 0; $i--) { $temp = array($keys[$i] => $temp); } var_dump($temp);

preferences:
52.07 ms | 405 KiB | 5 Q