#40395 [Opn->Bgs]: PCRE engine unable to output NULL characters

ID: 40395 Updated by: tony2001@php.net Reported By: jfrim at idirect dot com -Status: Open +Status: Bogus Bug Type: PCRE related Operating System: Win98SE PHP Version: 5.2.0 New Comment: Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Due to the volume of reports we can not explain in detail here why your report is not a bug. The support channels will be able to provide an explanation for you. Thank you for your interest in PHP. Previous Comments: ------------------------------------------------------------------------ [2007-02-08 00:04:01] jfrim at idirect dot com Description: ------------ The PERL-compatible regular expression engine is unable to output NULL characters correctly. This is evident with the preg_replace() function (tested), and seems likely evident with other PCRE functions (untested) according to some other but reports already submitted. Instead of returning a NULL character, a literal '\0' sequence is returned. Reproduce code: --------------- <?php $inputstring = "ASCII NUL\0, SOH\01, STX\02, ETX\03"; echo preg_replace('/([\\x00-\\x02])/e',"'['.ord('\\1').']'",$inputstring); ?> Expected result: ---------------- ASCII NUL[0], SOH[1], STX[2], ETX (Note that "ETX" is immediately followed by ctrl char #3) Actual result: -------------- ASCII NUL[92], SOH[1], STX[2], ETX (Note that "ETX" is immediately followed by ctrl char #3) The "92" is present in place of what should be "0" because preg_replace() incorrectly returns a literal '\0' sequence instead of a NULL character, and the ord() function then returns the value of the literal backslash. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=40395&edit=1