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run code in 150+ php & hhvm versions
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<? echo preg_match('~[0-9a-zA-ZäöüÄÖÜß&]~', '&-'); ?>
based on rmFaE
Output for 5.4.0 - 7.1.0
1
Output for 4.3.0 - 5.3.29
<? echo preg_match('~[0-9a-zA-ZäöüÄÖÜß&]~', '&-'); ?>