Change a relative URL to absolute URL

Question

for example i\'ve got a string like this:

$html = \'
            test
            

        

Answer 1

found a good way :

$html = preg_replace("#(<\s*a\s+[^>]*href\s*=\s*[\"'])(?!http)([^\"'>]+)([\"'>]+)#", '$1http://mydomain.com/$2$3', $html);

you can use (?!http|mailto) if you have also mailto links in your $html