p = "|<[^>]+>(.*?)</[^>]+>|i";
$str = "<b>example: </b><div align=left>this is a test</div>";
preg_match_all($p, $str, $matches);
print_r($matches);
"|<[^>]+>(.*?)</[^>]+>|i";是不是</[^>里少了\?
对 特殊符号要转义