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run code in 150+ php & hhvm versions
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<?php $text = <<<EOT The big bang bonged under the bung. EOT; $matches = null; preg_match_all('@b.n?g@', $text, $matches);; var_dump($matches);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(1) { [0]=> array(4) { [0]=> string(3) "big" [1]=> string(4) "bang" [2]=> string(4) "bong" [3]=> string(4) "bung" } }