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run code in 300+ PHP versions simultaneously
<?php $s = "три"; $s_cp = mb_convert_encoding($s, "windows-1251"); echo $s, ' ', strlen($s); echo "\n"; echo $s_cp, ' ', strlen($s_cp);
Output for 5.6.0 - 5.6.40, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
три 6 ��� 3
Output for 4.3.4 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
три 6 ?????? 6
Output for 4.3.2 - 4.3.3
Warning: mb_convert_encoding(): Unknown encoding "windows-1251" in /in/MMnu2 on line 3 три 6 0
Output for 4.3.0 - 4.3.1
Warning: mb_convert_encoding() [http://www.php.net/function.mb-convert-encoding]: Unknown encoding "windows-1251" in /in/MMnu2 on line 3 три 6 0

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