What is the problem with this link configuration?

$html->link($article['User']['username'],array('controller' => 'users','action' => 'view_profile',$article['User']['id'],array('class' => 'button','onmouseover'=>"loadtooltip(this,'$userid')",'onmouseout'=>'hidetooltip()')))开发者_StackOverflow);

I got this problem:

I'm doing wrong?

One or more of the variables you are passing to the link method is an array and not a string. It's either $article['User']['username'], $article['User']['id'] or $userid.

 <?  $html->link($article['User']['username'],array('controller' => 'users','action' => 'view_profile',$article['User']['id']),array('class' => 'button','onmouseover'=>"loadtooltip(this,'$userid')",'onmouseout'=>'hidetooltip()'));?>

Check Your $html->link syntax.