3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "Weiß, Goldmann, Göbel, Weiss, Göthe, Goethe und Götz"; var_dump(mb_convert_encoding($str, "ASCII"));
Output for 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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(52) "Wei?, Goldmann, G?bel, Weiss, G?the, Goethe und G?tz"
Output for 4.3.0 - 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
string(56) "Wei??, Goldmann, G??bel, Weiss, G??the, Goethe und G??tz"

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191.22 ms | 403 KiB | 309 Q