Need help with VERY simple RegEx

[scheda]

First of all, here's the code I'm having trouble with.

 

$vals[1][1] = preg_match("input name=\"authenticity_token\" type=\"hidden\" value=\"(*)\"", $twit_source);

 

What I'm trying to do is extract a token from the value of the input field.

 

It's on the page three times, but I only need it once.

 

I want to store it in $vals[1][1].

 

I'm getting this error.

 

Warning: preg_match() [function.preg-match]: Delimiter must not be alphanumeric or backslash in C:\wamp\www\twitter-poster\index.php on line 11

 

Thanks for any help you can lend.

[premiso]

preg_match('~input.*name="authenticity_token".*value="(.*)"~i", $twit_source, $match);
$vals[1][1] = $match[1];

 

Should work.

[scheda]

Yep, that did it.

 

Thanks!