From: lgandras at hotmail dot com
Operating system: WINDOWS AND LINUX
PHP version: 5.2.6
PHP Bug Type: Scripting Engine problem
Bug description: Backslash char is not listed on a string correctly
Description:
------------
When a string contains backslashs, they are shown on a way, but kept
differntly on the string. This is annoying when a string needs to be parsed
to know if a quote is being escaped.
Reproduce code:
---------------
$stringA = "\\'"; # returns \'
$stringB = "\\\'"; # returns \\'
$stringC = "\\\\'"; # returns \\'
$stringD = "\\\\\'"; # returns \\\'
# etc.. I don't have problem with it.
# But! this is the way it is shown!
# internally the string is kept how the programmer wrote it
# how are you supposted to known with php routines
# that $stringB escapes the quote and $stringC does not!
# using stripslashes is not an option,
# because it could delete some backslashes you want to keep.
#
#
# I've seen other bugs, where it is told
# that normal functioning of stripslashes
# is to delete all the "first" slashes,
# but then is not possible to parse a string
# even with regular expressions to know what
# a parser like mysql would understand of my
# string.
#
# In other words, backslashes are still there,
# but you can't know it!
$stringB == $stringC; # devolves true, in the end is right, but not now.
$stringB === $stringC; # also true (in the end), but not for mysql
substr($stringB, 0, 1) === substr($stringC, 0, 1);
substr($stringB, 1, 1) === substr($stringC, 1, 1);
substr($stringB, 2, 1) === substr($stringC, 2, 1);
# again, on the last 3 examples it returns true,
# but it doesn't let me know if the quote is being escaped or not.
# If questions are done, i need to parse a mysql string!
# My other solution is that str_replace and/or regular
# expression functions handle this issues in an adecuate way
echo "B:";
echo str_replace('\\', '', $stringB);
echo "<br />C:";
echo str_replace('\\', '', $stringC);
Expected result:
----------------
B:\'
C:'
# note that this is in concordance with what the manual says
Actual result:
--------------
B:'
C:'
--
Edit bug report at http://bugs.php.net/?id=45462&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=45462&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=45462&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=45462&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=45462&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=45462&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=45462&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=45462&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=45462&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=45462&r=support
Expected behavior: http://bugs.php.net/fix.php?id=45462&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=45462&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=45462&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=45462&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45462&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=45462&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=45462&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=45462&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=45462&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=45462&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=45462&r=mysqlcfg
