XPath query for content between HTML tags

I have HTML like this:

<html>
  <head>
    <meta content="{{find_this}}" />
  </head>
  <body>
    <div>{{find_this}}</div>
    <span>{{find_this}}</span>
    <p>{{find_this}}</p>
  </body>
</html>

I load this in a DOM document and XPath like this:

$dom = new DOMDocument();
$dom->loadHTML($template);
$xpath = new DOMXPath($dom);

I want to use xpath to query a tag that has {{find_this}} as value and no as attribute value. How can I do this?

Solution

This XPath expression,

//*[.='{{find_this}}']

will select all elements (not attributes) whose string value equals {{find_this}}.

Alternatively, if you wish to select all elements whose string value contains the string, use this XPath:

//*[contains(.,'{{find_this}}')]