[necris]

I use something similar to transform certain words into links and to "block" certain subrepticious spams.

I use the hook "postbit_display_complete", so its executed on every "page-spam" using "newreply_process" and "newthread_process" would be more efficient but less versatile.

Here is an option ^^ up to you tu take it. Regular expressions power .

$custom_replace[] = array (
		'string' => '/plainword/',
		'replacement' => '<a>tunned plain word</a>',
		'act' => 1,
                'grp' => 1
	);

....

$custom_replace[] = array (
		'string' => '/plainword10000/',
		'replacement' => '<a>tunned plain word 10000</a>',
		'act' => 1,
                'grp' => 10000
	);

$counter=0;
$grp_old=0;
foreach ($custom_replace as $k => $v) {
	if ( $v['act'] == 1) {
                if($v['grp']<>$grp_old){
                     $grp_old=$v['grp'];
                     $counter=0;
                }
                if($counter==0){
                      $counter=preg_match  ( $v['string']  , $this->post['message']);
                      if($counter<>0){
                            $this->post['message'] = preg_replace($v['string'],$v['replacement'],$this->post['message'],-1);
                      }
                }
	}
}