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@ 2015-12-10T11:00:35Z

<?php
echo PCRE_VERSION;

echo preg_match('/^([\pL\pN\pS-]+\.)[\pL]+$/', 'exämple.org');
echo ' but ';
echo preg_match('/^([\pL\pN\pS-]+\.)[\pL]+$/', 'exömple.org');

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preg_match: documentation ( source)

preferences:dark modelive preview

56.02 ms | 402 KiB | 5 Q