3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo mb_detect_encoding('áéóú', 'cp1251, UTF-8');
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
UTF-8
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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 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
Windows-1251
Output for 4.3.2 - 4.3.3
Warning: mb_detect_encoding(): Illegal argument in /in/Q6ADN on line 2 UTF-8
Process exited with code 139.
Output for 4.3.0 - 4.3.1
Warning: mb_detect_encoding() [http://www.php.net/function.mb-detect-encoding]: Illegal argument in /in/Q6ADN on line 2 UTF-8
Process exited with code 139.

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218.72 ms | 401 KiB | 354 Q