如何使用php在html中查找元素？

Question

I am trying to find an element in html document using php.

include_once('simple_html_dom.php');
            $handle = fopen("exercise/Exercise.php", "r");
            $file = fread($handle ,8192);
            $handle = file_get_html('exercise/Exercise.php');
            if (!empty($handle)) {
              $ret = $handle->find('div[id=abc]');
             }

but I have no idea What to do with $ret now? or even check has it found <div id="abc"> or not?is this even the right way I don't know because I am not very good at php?

Edit that question is way to vast for me understand.

Answer 1

它应该是

 $handle->find('div[id=abc]', 0);