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run code in 200+ php & hhvm versions
Bugs & Features
<?php echo preg_match('/[\x{a4}]/u', 'รค');
Output for 4.3.3 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.2.0
0
Output for 4.3.0 - 4.3.2
1