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run code in 200+ php & hhvm versions
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<?php $value = 'adsf'; var_dump(preg_match('/^[a-zA-ZåäöÅÄÖüÜéÉèÈêâÊÂëËæÆØø.,\' -]*$/u', $value));
Output for 4.3.0 - 7.1.7
int(1)