Content Comparison

$$t->fetch("[http://yourwebsite");]
 
 $t->submitForm( "0",
  array (
            'Address'=> $data['Address'],
            'Suburb'=> $data['Suburb'],
             'City'=> $data['City'],
             'Email'=> $data['email']
             'ok' => 'Submit',
)
);

if ($t->contains("This E-mail address has already been registered.")) {
 $errors = array('email'=>'This E-mail address has already been registered');