3v4l.org

run code in 300+ PHP versions simultaneously
<?php $reg = "#^([\w-]+://?|www[\.])?[a-z0-9]+[a-z0-9\-\.]*[a-z0-9]+\.[a-z]{2,7}$#"; $domain_name = "ελληνικά.idn.icann.org"; $domain_name = @idn_to_ascii($domain_name); echo preg_match($reg, $domain_name) ? "Domain is valid." : "Domain is not valid."; ?>
Output for 5.4.0 - 5.4.45, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Domain is valid.
Output for 7.3.32 - 7.3.33, 7.4.33, 8.0.13
Fatal error: Uncaught Error: Call to undefined function idn_to_ascii() in /in/V4Gu6:5 Stack trace: #0 {main} thrown in /in/V4Gu6 on line 5
Process exited with code 255.
Output for 4.3.2 - 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, 5.5.0 - 5.5.38

Process exited with code 255.
Output for 4.3.0 - 4.3.1
preferences:
273.05 ms | 401 KiB | 370 Q