这个a标签的正则如何写

求助：这个a标签的正则怎么写？
情感剧场：爱情公寓精装版
剧情

只想匹配class为black的超链接，不想匹配 class="font12-orange"

请问大神们，正则怎么写？
------解决思路----------------------

<br />$str = <<<EOF<br /><a href="http://jq.tvsou.com/introhtml/14/index_1468.htm" target="_blank" class="black">情感剧场：爱情公寓精装版</a><br /><a href="http://jq.tvsou.com/introhtml/730/index_73026.htm" target="_blank" class="font12-orange">剧情</a><br />EOF;<br /><br />preg_match('/<a href="([^"]+?)"[^>]+?class="black">(.+?)<\/a>/i',$str,$m);<br /><br />echo "<pre class="brush:php;toolbar:false">";<br />print_r($m);<br />echo "

";
/*
Array
(
[0] => 情感剧场：爱情公寓精装版
[1] => http://jq.tvsou.com/introhtml/14/index_1468.htm
[2] => 情感剧场：爱情公寓精装版
)
*/

------解决思路----------------------

<br />$str =<<<FDIPZONE<br /> <a href="http://jq.tvsou.com/introhtml/14/index_1468.htm" target="_blank" class="black">情感剧场：爱情公寓精装版</a><br /><a href="http://jq.tvsou.com/introhtml/730/index_73026.htm" target="_blank" class="font12-orange">剧情</a><br /> <a href="http://jq.tvsou.com/introhtml/14/index_1468.htm" target="_blank" class="black">情感剧场：爱情公寓精装版</a><br /><a href="http://jq.tvsou.com/introhtml/730/index_73026.htm" target="_blank" class="font12-orange">剧情</a><br /> <a href="http://jq.tvsou.com/introhtml/14/index_1468.htm" target="_blank" class="black">情感剧场：爱情公寓精装版</a><br /><a href="http://jq.tvsou.com/introhtml/730/index_73026.htm" target="_blank" class="font12-orange">剧情</a><br />FDIPZONE;<br /><br />preg_match_all('/<a.*?href="(.*?)".*?class=\"font12-orange\"/si',$str, $matches);<br /> <br />echo "<pre class="brush:php;toolbar:false">";<br />print_r($matches[1]);<br />echo "

";