#20231 [NEW]: \v C-style escape sequence in double-quoted strings

From: hioreanu+php@uchicago.edu Operating system: Linux, FreeBSD PHP version: 4.2.2 PHP Bug Type: Feature/Change Request Bug description: \v C-style escape sequence in double-quoted strings PHP does not seem to recognize the "\v" escape sequence within strings, like C does. This would probably be an issue in the PHP double-quoted string parser. I'm guessing this has been filed elsewhere as a bug, but I cannot find it (the bug search form does not like \v, '\v' or "\v"). Even though this is documented (language.types.string.php), it is still unexpected. Consider the following code: $s = ereg_replace("[\t\v\n\r ]", '', $s); The intent is to replace all whitespace, where whitespace is defined similarly to isspace(3) (but I forgot '\f', no big deal). The result is that whitespace *and* the "v" character is removed. The letter v is rare enough in English (and vertical tab is almost unheard-of in text) that this can go for a few days without being noticed. In the same vein, \f should also be recognized. I'm not sure about \a and \b, but I would definitely say trigraphs are a bad idea :). Perhaps only a warning would be enough. My copy of the C standard states that when an unknown escape sequence is encountered, the compiler should emit a diagnostic. That seems like reasonable behaviour. -- Edit bug report at http://bugs.php.net/?id=20231&edit=1 -- Try a CVS snapshot: http://bugs.php.net/fix.php?id=20231&r=trysnapshot Fixed in CVS: http://bugs.php.net/fix.php?id=20231&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=20231&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=20231&r=needtrace Try newer version: http://bugs.php.net/fix.php?id=20231&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=20231&r=support Expected behavior: http://bugs.php.net/fix.php?id=20231&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=20231&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=20231&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=20231&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=20231&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=20231&r=dst IIS Stability: http://bugs.php.net/fix.php?id=20231&r=isapi