01-06-2010
Quote:
Originally Posted by
shams11
I want to block all special characters except alphanumerics.. and "."(dot ) character
currently am using /[^a-zA-Z.]/
I want to even block only single dot or multiple dots..
ex:
. or .............. should be blocked.
please provide me the reg ex.
---------- Post updated at 05:11 AM ---------- Previous update was at 04:19 AM ----------
am trying =>[^a-zA-Z .{1}] . this is not working
Please provide me the solution asap
Hello,
what do you mean by this "I want to even block only single dot or multiple dots..
". this implies that you dont want dots at all?
the regex that you are trying is absolutely wrong.
In [ ] (character class) {}(counter) doesnt work. except it becomes a literal.
([^a-zA-Z]) implies that these alphabets are not included contrary to the one you have stated above. -> "want to block all special characters except alphanumerics.. "..
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LEARN ABOUT ULTRIX
re_comp
regex(3) Library Functions Manual regex(3)
Name
re_comp, re_exec - regular expression handler
Syntax
char *re_comp(s)
char *s;
re_exec(s)
char *s;
Description
The subroutine compiles a string into an internal form suitable for pattern matching. The subroutine checks the argument string against
the last string passed to
The subroutine returns 0 if the string s was compiled successfully; otherwise a string containing an error message is returned. If is
passed 0 or a null string, it returns without changing the currently compiled regular expression.
The subroutine returns 1 if the string s matches the last compiled regular expression, 0 if the string s failed to match the last compiled
regular expression, and -1 if the compiled regular expression was invalid (indicating an internal error).
The strings passed to both and may have trailing or embedded newline characters; they are terminated by nulls. The regular expressions
recognized are described in the manual entry for given the above difference.
Diagnostics
The subroutine returns -1 for an internal error.
The subroutine returns one of the following strings if an error occurs:
No previous regular expression
Regular expression too long
unmatched (
missing ]
too many () pairs
unmatched )
See Also
ed(1), ex(1), egrep(1), fgrep(1), grep(1)
regex(3)