php正则提取
$str = '<span>sdfsdf</span>
<img src=cid=2141&aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa width=256 height=176>
<spam>asdsdf</spam><IMG src="cid=2211&aaaaaaaaaa">asdfsadf';
preg_match_all("/\"?cid=(\S*)\"?/i", $str, $match_all);
var_dump($match_all);
我要提取 cid=后面这段, 这个例子就是提取:2211&aaaaaaaaaa和2141&aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,写的那个有多余的内容,求改正