一个好用的正则匹配电话号手机号邮箱网址的方

$str = "<a href='http://.baidu.' target='_blank'>百度</a>http://<a href='http://.sina.' target='_blank'>新浪</a>kod";

preg_match_all("/<a href=([\"\'])(http:\/\/([\w\d\.])+)[^>]*>(.*?)<\/a>/i", $str, $matches);

echo "<pre>";
var_dump($matches[2]);
echo "<br />";
var_dump($matches[4]);

$emails = "wangzhanu@126.ha12wangzhanu@163.";

preg_match_all("/([a-z0-9_\-\.]+)@(([a-z0-9]+[_\-]?)\.)+[a-z]{2,3}/i", $emails, $matches);

var_dump($matches[0]);

$tel = "13911112222sf010-44444442dfg18811112222";

preg_match_all("/1[3,5,8]{1}[0-9]{1}[0-9]{8}|0[0-9]{2,3}-[0-9]{7,8}(-[0-9]{1,4})?/", $tel, $matches);

var_dump($matches);