OK, I don't think I searched the web hard enough. I've not found a
definitive explanation, but I think the warning has something to do
with the dash symbols (\-) within the square brackets. Removing them -
changing them to the regular expression below - removes the warning
'^[a-zA-Z0-9_.]+@[a-zA-Z0-9]+\.[a-zA-Z0-9.]+$'
Question is now, how am I supposed to match dash symbols?
In one thread I read advised preg functions using the ereg functions.
I had ago with this, putting back in the dashes and changing the
regular expression to a perl RE:
'/^[a-zA-Z0-9_\-.]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-.]+$/'
No warnings this time and it appears to work. I still welcome any
feedback on ereg if anyone wants to give any.
On 17/01/2008, Dan Stevens (IAmAI) <dan.stevens.iamai@xxxxxxxxx> wrote:
> I'm have trouble with some code that I have been following in a book
> regarding regular expressions. I'm attempting to validate an email
> using a regular expression. Below is a simplified version of the code
> which reproduces the problem I'm having:
>
> <?php
> define("EMAIL_RE", '^[a-zA-Z0-9_\-.]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-.]+$');
> $email = trim($_GET['email']);
> $result = eregi(EMAIL_RE, $email);
> echo $result . "<br />\n";
> if ($result) echo "Email valid";
> else "Email invalid"
> ?>
>
> Calling this code with the argument get=bob@xxxxxxxxxxx, I'd expect an
> interger output something like this
>
> 15
> Email valid
>
> Yet instead, all get is a warning that I cannot fathom and nothing else:
>
> Warning: eregi() [function.eregi]: REG_ERANGE in C:\Documents and
> Settings\daniel.stevens\My
> Documents\Workspace\htdocs\tutoring\eregi_test.php on line 4
>
> I've tried searching for this warning to find out what it means, but I
> cannot find any reference to it on the web. Is anyone able to tell me
> what this warning means and why I am not getting the output I'm
> expecting? Can anyone advise how best to find out what a particular
> error or warning means so I don't have to ask on this list everytime I
> come across one that means nothing? php.net does not appear to have a
> list.
>
> Thanks in advance.
>
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