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run code in 200+ php & hhvm versions
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<?php $pattern = '#^(:?(:?/(?P<peekaboo>[^/\.,;?\n]+))?/(?P<action>[^/\.,;?\n]+))?$#'; if (preg_match($pattern, 'foo/bar', $matches)) { var_dump( $matches); }
Output for 4.3.0 - 7.2.0