How to use strpos with Medoo query

I wrote this function to retrieve the homepage of the website link recorded in stats based on STRPOS but Medoo is throwing an error.

function getSiteAuthor($string) {
if ($string) {
    $result = db::query("SELECT id, http FROM users WHERE (strpos(http, '$string') != false) ");
        foreach ($result as $row) {
            return $row['id'];
        }
}

}

http might be "http://example.com" and $string might be "http://example.com/somePage/". So I am looking for where http is found included in $string

The error is "strpos not found in table".

Can this be done using strpos or should it use LIKE and if so, how to code that.

Using LIKE works here and finds "$string" in "http" to produce the "id" of the site owner. Simply replace this line in the code above.

$result = db::query("SELECT id, http FROM users WHERE http LIKE '%$string%' ");