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run code in 150+ php & hhvm versions
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<?php $s = 'fooAbar'; $valid = (bool) preg_match('#(?:[A-Z].*){2}#', $s); var_dump($valid);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(false)