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run code in 300+ PHP versions simultaneously
<?php class IterateOver { static function string($str) { for ($i = 0, $len = mb_strlen($str); $i < $len; ++$i) { yield mb_substr($str, $i, 1); } } } foreach (IterateOver::string("meh") as $char) { var_dump($char); } var_dump(IterateOver::string("meh"));
Output for 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(1) "m" string(1) "e" string(1) "h" object(Generator)#2 (0) { }

preferences:
188.74 ms | 403 KiB | 192 Q