Matching the cookie in the PHP string

Find a remedy to match the cookie in the PHP string. Below is a PHP string:
HTTP/1.1 200 OK Date: Wed, 12 Mar 2014 11:57:58 GMT Server: Apache/2.2.9 (APMServ) mod_ssl/2.2.9 OpenSSL/0.9.8h PHP/5.2.6 X-Powered-: PHP/5.2.6 Cache-Control: public, max-age = 10 Last-Modified: Wed, 12 Mar 2014 11:57:59 GMT Set-Cookie: session = sessions % 7E53204bc7209fe349757896; expires = Wed, 12-Mar-2014 13:57:59 GMT; path =/; domain =. *****. com Transfer-Encoding: chunked Content-Type: text/html; charset = utf-8

I want to use the php regular expression to match this string:
Set-Cookie: session = cef14157b685078cf9c8f5d66fcefa81116a180d % 7E53204bc7209fe349757896;

Remedy!

Reply to discussion (solution)

$str = "HTTP/1.1 200 OK Date: Wed, 12 Mar 2014 11:57:58 GMT Server: Apache/2.2.9 (APMServ) mod_ssl/2.2.9 OpenSSL/0.9.8h PHP/5.2.6 X-Powered-By: PHP/5.2.6 Cache-Control: public,max-age=10 Last-Modified: Wed, 12 Mar 2014 11:57:59 GMT Set-Cookie: session=cef14157b685078cf9c8f5d66fcefa81116a180d%7E53204bc7209fe349757896; expires=Wed, 12-Mar-2014 13:57:59 GMT; path=/; domain=.*****.com Transfer-Encoding: chunked Content-Type: text/html; charset=utf-8 ";preg_match("/Set-Cookie:\s*session=[^;]+/i", $str,$match) ;var_dump($match[0]);

$s=<<< TXTHTTP/1.1 200 OK Date: Wed, 12 Mar 2014 11:57:58 GMT Server: Apache/2.2.9 (APMServ) mod_ssl/2.2.9 OpenSSL/0.9.8h PHP/5.2.6 X-Powered-By: PHP/5.2.6 Cache-Control: public,max-age=10 Last-Modified: Wed, 12 Mar 2014 11:57:59 GMT Set-Cookie: session=cef14157b685078cf9c8f5d66fcefa81116a180d%7E53204bc7209fe349757896; expires=Wed, 12-Mar-2014 13:57:59 GMT; path=/; domain=.*****.com Transfer-Encoding: chunked Content-Type: text/html; charset=utf-8 TXT;preg_match('/(Set-Cookie:\s+session=.+?;)\s+expires=/s',$s,$m);echo $m[1];