3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string="M"; $strig=""; $strg=""; $stg=""; $last=array($strig,$strg,$string,$stg); echo Implode($last,""); /*switch($last) { case 'k': case 'K': echo "k"; break; case 'm': case 'M': echo "k"; break; default: echo "o"; } */ ?>

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55.98 ms | 402 KiB | 5 Q