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<?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);
Output for git.master, git.master_jit, rfc.property-hooks
int(1) array(3) { [0]=> string(6) "<link>" [1]=> string(4) "link" [2]=> string(0) "" } int(0) array(0) { } int(1) array(3) { [0]=> string(15) "<link rel=test>" [1]=> string(4) "link" [2]=> string(9) " rel=test" } int(1) array(3) { [0]=> string(6) "<link>" [1]=> string(4) "link" [2]=> string(0) "" } int(0) array(0) { } int(1) array(3) { [0]=> string(15) "<link rel=test>" [1]=> string(4) "link" [2]=> string(9) " rel=test" }

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