note 102285 added to regexp.reference.conditional

Repetition of a subpattern will repeat conditionals that are contained inside it, updating subpattern matches with iteration. Consider the following code, which scans thru HTML, keeping track of angle brackets "<" ">". If open bracket "<" matches, then closing bracket ">" must follow before repetition can possibly end. That way regex will effectively match only outside of tags. <?php $pattern='%(*ANY)(.*?(<)(?(2).*?>)(.*?))*?\'\'%s'; $replace='\1Fred'; $subject= '<html><body class=\'\'>\'\' went to '\'\meyer and ran into <b>\'\'</b>. </body></html>' echo preg_replace($pattern,$replace,$subject); ?> Output will be: '<html><body class=\'\'>Fred went to Fredmeyer and ran into <b>Fred</b>. </body></html>' ---- Server IP: 69.147.83.197 Probable Submitter: 24.113.79.192 ---- Manual Page -- http://www.php.net/manual/en/regexp.reference.conditional.php Edit -- https://master.php.net/note/edit/102285 Del: integrated -- https://master.php.net/note/delete/102285/integrated Del: useless -- https://master.php.net/note/delete/102285/useless Del: bad code -- https://master.php.net/note/delete/102285/bad+code Del: spam -- https://master.php.net/note/delete/102285/spam Del: non-english -- https://master.php.net/note/delete/102285/non-english Del: in docs -- https://master.php.net/note/delete/102285/in+docs Del: other reasons-- https://master.php.net/note/delete/102285 Reject -- https://master.php.net/note/reject/102285 Search -- https://master.php.net/manage/user-notes.php