Can't get full post title if there a spaces in title

Question

I want to make a custom query that checks the post title and puts in a different URL like this:

<a href=bing.com/search?q=<?php echo single_post_title(); ?>>Blablabla</a>

But it does not work for me if I have a post with a space in it, like Hello World. Then it only shows me Hello in the link. How can I get the full post title?

I tried this too, but did not work, just like the first one.

<?php
$titletest = get_the_title();

echo " <a href=http://www.bing.com/search?q=$titletest>$titletest</a> ";
?>

Answer 1

Damn, I came with a solution after I posted it....

echo ' <a href="http://www.bing.com/search?q=' . urlencode($titletest) . '">' . $titletest . '</a>';