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<?php $value = str_repeat('a.', 126) . 'aaaa'; // 255 characters, max allowed is 253, trailing dot ignored $result = idn_to_ascii($value, 0, INTL_IDNA_VARIANT_UTS46, $idnaInfo); var_dump($result); var_dump($idnaInfo); // $idnaInfo['errors'] should be equal to 4, it is value of IDNA_ERROR_DOMAIN_NAME_TOO_LONG
Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
bool(false) array(0) { }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 bool(false) array(0) { }
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/dat2m:4 Stack trace: #0 {main} thrown in /in/dat2m on line 4
Process exited with code 255.

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