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run code in 300+ PHP versions simultaneously
<?php $string = 'Hello'; var_dump(mb_detect_encoding($string)); mb_detect_order('UTF-8'); var_dump(['order' => mb_detect_order(), 'detected' => mb_detect_encoding($string)]);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(5) "ASCII" array(2) { ["order"]=> array(1) { [0]=> string(5) "UTF-8" } ["detected"]=> string(5) "UTF-8" }

preferences:
211.49 ms | 404 KiB | 366 Q