Str_replace for the whole word

[baris22]

I want to find and replace some words. the problem is i do not want to replace the words if they are in a word.

forexample this is the sentence:

I want to change.

the output should be:

I want change.

as you see "an" did not changed in the word "change"
because "an" is not by it self.

$short = array('of', 'to', 'in', 'an');
$title = str_replace($short, "", $title);

How can i do this?

Thanks

 

[chadsmith]

$title = str_replace(" ".$short." ", " ", $title);

It's not perfect, but that will do it.