#45462 [NEW]: Backslash char is not listed on a string correctly

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