PHP - 使用preg_replace在链接之前放置http：//

Question

I have a bbCode function I made:

function bbCode($str)
{
    $values = array(
      '@\[link="(.*?)"\](.*?)\[\/link\]@i' => '<a href="$1">$2</a>'

    );
    return preg_replace(array_keys($values), array_values($values), $str);
}

It works well but if the user types, for example [link="google.com"]Something[/link], the result would be

<a href="google.com">Something</a>

And that would return to www.mywebsite.com/google.com How could I prevent this from happening?

Answer 1

You can prefix it with http://

function bbCode($str)
{
$values = array(
  '@\[link="[http:\/\/]*(.*?)"\](.*?)\[\/link\]@i' => '<a href="http://$1">$2</a>'
);
return preg_replace(array_keys($values), array_values($values), $str);
}