Hi, It seems that perl regular expressions lost one polish letter (ą): https://www.compart.com/en/unicode/U+0105
I can see this problem only under OpenBSD 6.7 with php-7.4 (same version of php under linux is OK) Ex.: PHP 7.4.10 or 7.4.5 <?php var_dump(preg_match('/^.{5,64}$/', 'daswęzdas')); int(1) // OK PHP 7.4.10 or 7.4.5 <?php var_dump(preg_match('/^.{5,64}$/', 'daswązdas')); int(0) // UPS??? PHP 7.3.21 <?php var_dump(preg_match('/^.{5,64}$/', 'daswęzdas')); int(1) // OK PHP 7.3.21 <?php var_dump(preg_match('/^.{5,64}$/', 'daswązdas')); int(1) // OK Any ideas how to fix that? Regards, Bambero