RE: [PHP] Regular Expressions?

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:jason@thinkingman.org] Sent: Friday, April 20, 2001 2:41 AM To: php-general@lists.php.net 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" <brianj@fusionwerks.com> wrote in message news:92203389127.20010420015151@fusionwerks.com... > 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. > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > For additional commands, e-mail: php-general-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net For additional commands, e-mail: php-general-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net