3v4l.org

run code in 300+ PHP versions simultaneously
<?php $inputs = array(NULL, 0, 1, 1.1, '1.1'); foreach ($inputs as $input) { $output = key(array($input => NULL)); printf("Input: %s\n", var_export($input, TRUE)); printf("Output: %s\n\n", var_export($output, TRUE)); }

preferences:
34.12 ms | 402 KiB | 5 Q