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run code in 150+ php & hhvm versions
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<?php $subject = "3rd from last"; preg_match('~(?P<index>([0-9]+)?:rd|st) from (?P<position>(last|end|start|beginning)+)~', $subject, $matches); var_dump($matches);
Output for 4.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(0) { }