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<?php $comment = ' <!--This is a comment. <!--This is a comment. Comments are not displayed in the browser --><!--This is a comment. Comments are not displayed in the browser--> Comments are not displayed in the browser-->'; preg_match_all('/(\<!--\s*.*?((--\>)|$))/imsx', $comment, $matches); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> array(2) { [0]=> string(91) "<!--This is a comment. <!--This is a comment. Comments are not displayed in the browser -->" [1]=> string(67) "<!--This is a comment. Comments are not displayed in the browser-->" } [1]=> array(2) { [0]=> string(91) "<!--This is a comment. <!--This is a comment. Comments are not displayed in the browser -->" [1]=> string(67) "<!--This is a comment. Comments are not displayed in the browser-->" } [2]=> array(2) { [0]=> string(3) "-->" [1]=> string(3) "-->" } [3]=> array(2) { [0]=> string(3) "-->" [1]=> string(3) "-->" } }

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