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Editorial Team
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Asked: 2026-05-12T10:42:39+00:00

I have an HTML document as a string I want to search for a

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I have an HTML document as a string

I want to search for a keyword in this document and figure out where did it appear in the document

I mean in which tag did it appear

did it appear in H1,H2 or TITLE tag

lets say my document is

        $string = "<html>
                   <head> 
                   <title>bar , this is an example</title> 
                   </head> 
                   <body> 
                   <h1>latest news</h1>
                   foo <strong>bar</strong> 
                   </body>
                   </html>";


                   $arr = find_term("bar",$string);
                   print_r($arr);

I expect the result to be like this

                   [0]=> title
                   [1]=> strong

because “bar” appeared one time in TITLE tag and one time in the STRONG tag

I knew it is a complicated question, that is why I am asking if someone knows the answer 🙂

thanks

what I have so far is

        function find_term($term,$string){
               $arr = explode($term, $string);
               return $arr;
        }
        $arr = find_term("bar",$string);
        print_r($arr);

now we have an array which has the value

             Array
             (
             [0] => <html>
               <head>
               <title>

             [1] =>  , this is an example</title>
               </head>
               <body>
               <h1>latest news</h1>
               foo <strong>

             [2] => </strong>
               </body>
               </html>
             )

you can see that the last tag of every element of the array is the tag which contains “bar”
but the question now is how to know the last tag appeard in every element?

Thanks

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1 Answer

  1. Editorial Team

    You can use DOMDocument and xpath for that. 

    <?php
$doc = new DOMDocument;
$doc->loadhtml('<html>
  <head> 
    <title>bar , this is an example</title> 
  </head> 
  <body> 
    <h1>latest news</h1>
    foo <strong>bar</strong> 
    <i>foobar</i>
   </body>
</html>');
$xpath = new DOMXPath($doc);
foreach($xpath->query('//*[contains(child::text(),"bar")]') as $e) {
  echo $e->tagName, "\n";
}

    prints

    title
strong
i

    Note the i-element. It contains foobar, not bar as a single word and matches the xpath query. So this solution may or may not suffice.

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