How do I change words in post texts?

[DonosOdD]

Yeah, tried it and got Pattern Error 0.

This is the code I'm using, trying to simply change "foo" to "boo".

PHP Code:

if ($forum['forumid'] != 2)
{ 
$pat = array(
'/\bfoo\b/i'
);

$rep = array(
' boo'
);

$ret = preg_replace($pat, $rep, $this->post['message']);
if ($ret !== NULL)
   $this->post['message'] = $ret;
else
   $this->post['message'] .= '<BR /><BR />Pattern error: ' . preg_last_error();

} 


I guess the problem is with the preg_replace parameters, I'm passing an array whilst I should have passed an string. Is that it? How do I solve it?


Thanks again!