#46066 [Opn->Fbk]: Regular Expression differences between 4.4 and 5.2

ID: 46066 Updated by: felipe@php.net Reported By: ewen dot cumming at gmail dot com -Status: Open +Status: Feedback Bug Type: PCRE related Operating System: Debian Linux PHP Version: 5.2CVS-2008-09-12 (snap) New Comment: Use var_dump(preg_last_error()) after preg_match_all() to check if any the problems mentioned in the documentation (http://docs.php.net/preg-last-error) has occured. Previous Comments: ------------------------------------------------------------------------ [2008-09-12 14:11:33] ewen dot cumming at gmail dot com Note there should be a space in my reproduce code regex (where the line break happened to occur): The below should set it right: $pattern = "/<!T_([^> ]+)([^>]*)>(.*?)<!T_end\\1>". "|<!T_([^> ]+)([^>]*)>/si"; ------------------------------------------------------------------------ [2008-09-12 14:05:28] ewen dot cumming at gmail dot com Description: ------------ In upgrading our code base from PHP4.4 to 5.2 I found the same regular exression would give different results. Apologies for the large include string and results, however if I reduce the input string any more the problem doesn't occur. I have tested with: PHP 4.4.4-8+etch6 (cli) (built: May 16 2008 15:59:34) Zend Engine v1.3.0 PHP 5.2.0-8+etch11 (cli) (built: May 10 2008 10:46:24) Zend Engine v2.2.0 And before submitting the bug: PHP 5.2.7-dev (cli) (built: Sep 12 2008 15:05:09) Zend Engine v2.2.0 Reproduce code: --------------- <?php include( 'http://www.workingweb.nl/example/input.inc' ); $pattern = "/<!T_([^> ]+)([^>]*)>(.*?)<!T_end\\1>|<!T_([^> ]+)([^>]*)>/si"; preg_match_all( $pattern, $string, $matches ); var_dump($matches); ?> Expected result: ---------------- This is what I get in PHP4.4 (and what I would expect after an PHP5.2 upgrade). array(6) { [0]=> array(22) { [0]=> string(31) "<!T_lang_searchforpublications>" [1]=> string(15) "<!T_lang_title>" [2]=> string(11) "<!T_fTitle>" [3]=> string(16) "<!T_lang_author>" [4]=> string(12) "<!T_fAuthor>" [5]=> string(17) "<!T_lang_session>" [6]=> string(13) "<!T_fSession>" [7]=> string(17) "<!T_lang_summary>" [8]=> string(13) "<!T_butCheck>" [9]=> string(21) "<!T_lang_showsummary>" [10]=> string(18) "<!T_lang_language>" [11]=> string(25) "<!T_languageselectwidget>" [12]=> string(20) "<!T_lang_daterange1>" [13]=> string(15) "<!T_lang_start>" [14]=> string(20) "<!T_startdateWidget>" [15]=> string(20) "<!T_lang_daterange2>" [16]=> string(13) "<!T_lang_end>" [17]=> string(18) "<!T_enddateWidget>" [18]=> string(25) "<!T_lang_publicationtype>" [19]=> string(21) "<!T_pubtypeselectbox>" [20]=> string(16) "<!T_lang_search>" [21]=> string(15) "<!T_lang_clear>" } [1]=> array(22) { [0]=> string(0) "" [1]=> string(0) "" [2]=> string(0) "" [3]=> string(0) "" [4]=> string(0) "" [5]=> string(0) "" [6]=> string(0) "" [7]=> string(0) "" [8]=> string(0) "" [9]=> string(0) "" [10]=> string(0) "" [11]=> string(0) "" [12]=> string(0) "" [13]=> string(0) "" [14]=> string(0) "" [15]=> string(0) "" [16]=> string(0) "" [17]=> string(0) "" [18]=> string(0) "" [19]=> string(0) "" [20]=> string(0) "" [21]=> string(0) "" } [2]=> array(22) { [0]=> string(0) "" [1]=> string(0) "" [2]=> string(0) "" [3]=> string(0) "" [4]=> string(0) "" [5]=> string(0) "" [6]=> string(0) "" [7]=> string(0) "" [8]=> string(0) "" [9]=> string(0) "" [10]=> string(0) "" [11]=> string(0) "" [12]=> string(0) "" [13]=> string(0) "" [14]=> string(0) "" [15]=> string(0) "" [16]=> string(0) "" [17]=> string(0) "" [18]=> string(0) "" [19]=> string(0) "" [20]=> string(0) "" [21]=> string(0) "" } [3]=> array(22) { [0]=> string(0) "" [1]=> string(0) "" [2]=> string(0) "" [3]=> string(0) "" [4]=> string(0) "" [5]=> string(0) "" [6]=> string(0) "" [7]=> string(0) "" [8]=> string(0) "" [9]=> string(0) "" [10]=> string(0) "" [11]=> string(0) "" [12]=> string(0) "" [13]=> string(0) "" [14]=> string(0) "" [15]=> string(0) "" [16]=> string(0) "" [17]=> string(0) "" [18]=> string(0) "" [19]=> string(0) "" [20]=> string(0) "" [21]=> string(0) "" } [4]=> array(22) { [0]=> string(26) "lang_searchforpublications" [1]=> string(10) "lang_title" [2]=> string(6) "fTitle" [3]=> string(11) "lang_author" [4]=> string(7) "fAuthor" [5]=> string(12) "lang_session" [6]=> string(8) "fSession" [7]=> string(12) "lang_summary" [8]=> string(8) "butCheck" [9]=> string(16) "lang_showsummary" [10]=> string(13) "lang_language" [11]=> string(20) "languageselectwidget" [12]=> string(15) "lang_daterange1" [13]=> string(10) "lang_start" [14]=> string(15) "startdateWidget" [15]=> string(15) "lang_daterange2" [16]=> string(8) "lang_end" [17]=> string(13) "enddateWidget" [18]=> string(20) "lang_publicationtype" [19]=> string(16) "pubtypeselectbox" [20]=> string(11) "lang_search" [21]=> string(10) "lang_clear" } [5]=> array(22) { [0]=> string(0) "" [1]=> string(0) "" [2]=> string(0) "" [3]=> string(0) "" [4]=> string(0) "" [5]=> string(0) "" [6]=> string(0) "" [7]=> string(0) "" [8]=> string(0) "" [9]=> string(0) "" [10]=> string(0) "" [11]=> string(0) "" [12]=> string(0) "" [13]=> string(0) "" [14]=> string(0) "" [15]=> string(0) "" [16]=> string(0) "" [17]=> string(0) "" [18]=> string(0) "" [19]=> string(0) "" [20]=> string(0) "" [21]=> string(0) "" } } Actual result: -------------- Result in PHP5.2 array(6) { [0]=> array(0) { } [1]=> array(0) { } [2]=> array(0) { } [3]=> array(0) { } [4]=> array(0) { } [5]=> array(0) { } } ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=46066&edit=1