Bug #60380 [Opn->Csd]: preg_split and old version split
Edit report at https://bugs.php.net/bug.php?id=60380&edit=1 ID: 60380 User updated by:evrinoma at gmail dot com Reported by:evrinoma at gmail dot com Summary:preg_split and old version split -Status: Open +Status: Closed Type: Bug Package:*Programming Data Structures Operating System: Linux CenOS5 CentOS6 PHP Version:5.3.8 Block user comment: N Private report: N New Comment: Many thanks for help Previous Comments: [2012-08-30 19:55:06] ni...@php.net You are dealing with two levels of unescaping here. The first is the usual for string, the second is additionally done by PCRE. E.g. if you write "" the actually resulting string will just be "\\" (because \\ is unescaped to \). This is then passed to PCRE, which itself again does unescaping, so the \\ is turned into \. That's why you need four backslashes to produce one literal backslash in a regular expression. In your particular case three work too, but only because the following character does not form an escape sequence. [2012-08-30 19:24:38] cjbf at cam dot ac dot uk Three \s are needed to match one \. Could that at least be documented if it's not wrong? $text='AA\\nB and B\r';// contains \n and \r print_r(preg_split('/\\\n|\\\r/', $text)); gives Array ( [0] => AA [1] => B and B [2] => ) [2012-08-30 19:02:43] cjbf at cam dot ac dot uk Put simply, preg_split treats "\\" wrongly. It ought to search for an actual "\" but never matches it. ---------------- [2011-11-25 07:15:00] evrinoma at gmail dot com Description: --splite--- array[0]=0123456789-- array[1]=qwertyuiop-- array[2]=9876543210-- array[3]=poiuytrewq-- array[4]=0123456789-- array[5]=asdfghjkl-- --preg_splite-- array[0]=0123456789\qwertyuiop-- <<<<<<<<< ??? array[1]=9876543210-- array[2]=poiuytrewq-- array[3]=0123456789-- array[4]=asdfghjkl-- array[5]=-- --- Test script: --- BUG \n"); $date="0123456789\\qwertyuiop 9876543210.poiuytrewq:0123456789 asdfghjkl"; $var = split( "[-\\. :]",$date ); printf(" array[0]=%s-- \n",$var[0]); printf(" array[1]=%s-- \n",$var[1]); printf(" array[2]=%s-- \n",$var[2]); printf(" array[3]=%s-- \n",$var[3]); printf(" array[4]=%s-- \n",$var[4]); printf(" array[5]=%s-- \n",$var[5]); printf(" --preg_splite-- \n"); $var = preg_split( "#[-\\. :]#",$date); printf(" array[0]=%s-- \n",$var[0]); printf(" array[1]=%s-- \n",$var[1]); printf(" array[2]=%s-- \n",$var[2]); printf(" array[3]=%s-- \n",$var[3]); printf(" array[4]=%s-- \n",$var[4]); printf(" array[5]=%s-- \n",$var[5]); printf(" --- \n"); ?> -- Edit this bug report at https://bugs.php.net/bug.php?id=60380&edit=1
[PHP-BUG] Bug #60380 [NEW]: preg_split and old version split
From: Operating system: Linux CenOS5 CentOS6 PHP version: 5.3.8 Package: *Programming Data Structures Bug Type: Bug Bug description:preg_split and old version split Description: --splite--- array[0]=0123456789-- array[1]=qwertyuiop-- array[2]=9876543210-- array[3]=poiuytrewq-- array[4]=0123456789-- array[5]=asdfghjkl-- --preg_splite-- array[0]=0123456789\qwertyuiop-- < ??? array[1]=9876543210-- array[2]=poiuytrewq-- array[3]=0123456789-- array[4]=asdfghjkl-- array[5]=-- --- Test script: --- BUG \n"); $date="0123456789\\qwertyuiop 9876543210.poiuytrewq:0123456789 asdfghjkl"; $var = split( "[-\\. :]",$date ); printf(" array[0]=%s-- \n",$var[0]); printf(" array[1]=%s-- \n",$var[1]); printf(" array[2]=%s-- \n",$var[2]); printf(" array[3]=%s-- \n",$var[3]); printf(" array[4]=%s-- \n",$var[4]); printf(" array[5]=%s-- \n",$var[5]); printf(" --preg_splite-- \n"); $var = preg_split( "#[-\\. :]#",$date); printf(" array[0]=%s-- \n",$var[0]); printf(" array[1]=%s-- \n",$var[1]); printf(" array[2]=%s-- \n",$var[2]); printf(" array[3]=%s-- \n",$var[3]); printf(" array[4]=%s-- \n",$var[4]); printf(" array[5]=%s-- \n",$var[5]); printf(" --- \n"); ?> -- Edit bug report at https://bugs.php.net/bug.php?id=60380&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=60380&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=60380&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=60380&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=60380&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=60380&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=60380&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=60380&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=60380&r=needscript Try newer version: https://bugs.php.net/fix.php?id=60380&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=60380&r=support Expected behavior: https://bugs.php.net/fix.php?id=60380&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=60380&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=60380&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=60380&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=60380&r=php4 Daylight Savings:https://bugs.php.net/fix.php?id=60380&r=dst IIS Stability: https://bugs.php.net/fix.php?id=60380&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=60380&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=60380&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=60380&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=60380&r=mysqlcfg