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run code in 150+ php & hhvm versions
Bugs & Features
<?php $input = 'test <span>1234</span><span>12345</span>test<span>5678</span><span>12345</span>test'; preg_match("/(<span>\d{4}<\/span>)/", $input, $output); print_r($output);
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [0] => <span>1234</span> [1] => <span>1234</span> )
Output for hhvm-3.10.0

Process exited with code 153.