如何用正则解析这样的字符串？

问题：如何用正则解析这样的字符串？
描述:

形如：

$str='<p>hhhhhhhhhhhhh</p>'

$str='<h1>jjjjjjjjjjjjjjjj</h1>'

想要得到p或者h1之间的内容,怎么写？

---

解决方案1:

$reg='#<([\w]+)>(.+?)<\/\1>#s'

解决方案2:

<?php

$reg = '/<([a-z0-9]+)>([\s\S]+?)<\/\1>/';

$str='<p>hhhhhhhhhhhhh</p>';
preg_match($reg, $str, $result);
var_dump($result);

$str='<h1>jjjjjjjjjjjjjjjj</h1>';
preg_match($reg, $str, $result);
var_dump($result);

运行结果:

array(3) {
  [0]=>
  string(20) "<p>hhhhhhhhhhhhh</p>"
  [1]=>
  string(1) "p"
  [2]=>
  string(13) "hhhhhhhhhhhhh"
}
array(3) {
  [0]=>
  string(25) "<h1>jjjjjjjjjjjjjjjj</h1>"
  [1]=>
  string(2) "h1"
  [2]=>
  string(16) "jjjjjjjjjjjjjjjj"
}