正規表現の解決策、対処方法

$s = "server_model=ProLiant DL360 G5;; server_cpu_model=Intel(R) Xeon(R) CPU    E5405  @ 2.00GHz;; cpu=21mhz;1;3;5;8";<br />preg_match_all('/\s*(\S.+)(?:;;<br><font color='#FF8000'>------解决思路----------------------</font><br>$)/U', $s, $m);<br />print_r($m[1]);

Array<br />(<br />    [0] => server_model=ProLiant DL360 G5<br />    [1] => server_cpu_model=Intel(R) Xeon(R) CPU    E5405  @ 2.00GHz<br />    [2] => cpu=21mhz;1;3;5;8<br />)<br /><br />