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run code in 300+ PHP versions simultaneously
<?php function doIt($string, $charset) { echo mb_strtoupper(mb_substr($string, 0, 1, $charset), $charset).mb_strtolower(mb_substr($string, 1, null, $charset), $charset), "\n"; } doIt('abcd', 'UTF-8'); doIt('abcd', 'ASCII'); doIt('abcd', 'ISO-8859-15');
Output for git.master, git.master_jit, rfc.property-hooks
Abcd Abcd Abcd

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