Online PHP editor | refs for GApZ9

<?php var_dump(preg_match('#<(link)(\s[^>]*|)>#i', '<link>', $matches));var_dump($matches); var_dump(preg_match('#<(link)(\s[^>]*|)>#i', '<link/>', $matches));var_dump($matches); var_dump(preg_match('#<(link)(\s[^>]*|)>#i', '<link rel=test>', $matches));var_dump($matches); var_dump(preg_match('#<(link)(\s[^>]*)?>#i', '<link>', $matches));var_dump($matches); var_dump(preg_match('#<(link)(\s[^>]*)?>#i', '<link/>', $matches));var_dump($matches); var_dump(preg_match('#<(link)(\s[^>]*)?>#i', '<link rel=test>', $matches));var_dump($matches);