if you put ^ at the start of your regexp, that means you want the start of
the string to match your expression...$ is used for the end of the string...
-jack
-----Original Message-----
From: Jason Caldwell [mailto:[EMAIL PROTECTED]]
Sent: Friday, April 20, 2001 2:41 AM
To: [EMAIL PROTECTED]
Subject: Re: [PHP] Regular Expressions?
I'm a little lost as to the exact function of the following:
^ and $
I noticed in the example below... that when I added the $ to the end of the
expression, I wasn't able anymore to put a non-alphanumeric character in the
end, for example (without the $)
I was able to enter the following and get a 'match'
aaa.a! <-- matched
aaa.! <-- no match
after I put the $ on the end
aaa.a! <-- no match
aaa.aa32 <-- match...
So, am I to understand that the ^ and $ are used to tell the expression that
it *must* match what the expression expects? I guess why I'm so confused is
because -- I thought when you create an expression, that it must match the
parameters of that expression... then what are the ^ $ for?? It's like to
create an expression, but it truly won't work unless you have it turned on
with ^ $ characters.
Thanks.
Jason
"Brian Clark" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi Jason,
>
> @ 1:43:19 AM on 4/20/2001, Jason Caldwell wrote:
>
> ...
> > I want to match any of the following:
>
> > 1.1 or a.a
>
> > or 1111.1111 or aaaa.aaaa <-- any number of digits (0-9) or alpha
(a-z)
> > on either side of the dot.
>
> > if(eregi("^([0-9][a-z]\.[0-9][a-z]", $myArray[x]))
>
> Your parentheses are slightly wrong.
>
> if(
> eregi(
> "^
> (
> /* unmatched parens */
>
> [0-9][a-z]
> /* only matches one digit or character */
>
> \.
> /* matches period */
>
> [0-9][a-z]
> /* only matches one digit or character */
> ",
> $myArray[x]
> )
> /* syntax error :) */
> )
>
> > Is this correct? I think I'm missing something.
>
> You want something like this:
>
> <?php
>
> /* eregi("^([[:alnum:]]+\.[[:alnum:]]+)", $myArray[x]) */
>
> $string = 'aaa.aaa';
> $string_2 = 'aaaaaa';
>
> print(eregi("^([[:alnum:]]+\.[[:alnum:]]+)", $string) ? 'matched' : 'no
match');
> print(eregi("^([[:alnum:]]+\.[[:alnum:]]+)", $string_2) ? 'matched' : 'no
match');
>
> ?>
>
> > Thanks.
> > Jason
>
> -Brian
> --
> PGP is spoken here: 0xE4D0C7C8
> Please, DO NOT carbon copy me on list replies.
>
>
>
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