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run code in 300+ PHP versions simultaneously
<?php //$email = 'johnsnow@ヒキワリ.ナットウ.com'; echo 1; //$email = str_replace(array('xn--', '@-'), array('','@'), idn_to_ascii($email)); //echo $email;
Output for 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 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 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 - 8.3.7
1

preferences:
256.86 ms | 405 KiB | 262 Q