Simple HTML DOM Parser - how to add "hello world" after the tag?

Question

Parsing

Greetings,
Can you tell me how to use Simple HTML DOM Parser - how to add hello world after the opening tag without changing its content?
And a quick question:
Is it possible for the parser to substitute the full paths of the site after parsing in the entire site (otherwise it turns out localhost/site_page ?

Answer 1

Understood the first part

$inject = 'hello world'; 
$html->find('body', 0)->innertext = $inject.$html->find('body', 0)->innertext;