3v4l.org

run code in 150+ php & hhvm versions
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<?php preg_match('/([A-Za-z])++([A-Za-z])+/', 'FooBar', $m); var_dump($m);
based on rUdd8
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(0) { }