<?php
$value = str_repeat('a.', 126) . 'aaa'; // 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
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/tuM9l:4
Stack trace:
#0 {main}
thrown in /in/tuM9l on line 4
Process exited with code 255.
Output for 5.6.0 - 5.6.24, 7.0.0 - 7.0.9
Fatal error: idn_to_ascii(): ICU returned an unexpected length in /in/tuM9l on line 4
Process exited with code 255.