strip（）并获得价值

Question

I have a html list that looks like this:

• animals (45)
• houses (36)
• computers (96)

I want to get all the values inside those () and make like $sum = 45+36+96;

How can I do that? Thanks

Answer 1

assuming that the html content is already in a php variable like $list,

preg_match_all('{<li>[a-zA-Z\s]*\s\(([0-9]*)\)</li>}', $list, $matches);
$sum = array_sum($matches[1]);

for <li><span><a href="">, you can modify the regex to something like

preg_match_all('{<li>(["=a-zA-Z<>\s]*)\s\(([0-9]*)\)([/a-zA-Z<>\s]*)</li>}', 
   $list, $matches);
$sum = array_sum($matches[2]);