How to display custom error messages instead of the default ones? - php

Question

I'm creating a recommendation controller using PHP Yii framework, using a heuristic concept. My recommendation will only work if the user or other user with the same course have made a booking. But right now if my bookings is equal to null it is showing an error message like below:
Error 500 Invalid argument supplied for foreach()
Therefore I have made a condition where I created my own message:
We are sorry currently there are no recommendation of books at this moment
and it is working. Unfortunately, it also shows together with the error message. I just want to show only my own message. Below is my code:
//recommendation - use heuristic concept, more accurate result as more people same course recommendation
public function actionRecommendation() {
$user = User::model()->findByPk(Yii::app()->user->id);
//get course mates
$courseMates = User::model()->findAllByAttributes(array('course_id' => $user->course_id));
$popularity = array();
if($bookings==null){Yii::app()->user->setFlash('success', 'We are sorry currently there are no recommendation of books at this moment'); }
foreach ($courseMates as $courseMate) {
//identify all bookings made by user
$bookings = Booking::model()->findAllByAttributes(array('user_id' => $courseMate->id));
foreach ($bookings as $booking) {
//add hit into array as per book
$popularity[$booking->book_id] = (isset($popularity[$booking->book_id])) ? $popularity[$booking->book_id] + 1 : 1;
}
}
//sort according to popular count
arsort($popularity, SORT_NUMERIC);
$display = 10;
foreach ($popularity as $bookId => $popular) {
//if display is 0, break the foreach, only display up 10
if ($display == 0) {
break;
}
//create book object array
$books[] = Book::model()->findByPk($bookId);
//reduce book count
$display--;
}
$this->render('recommendation',array(
'books'=>$books,
));
}()
How can I modify it so it displays just the custom error message?

Answer 1

For Input Fields
*In your Model*
array('gender','required','message'=>'Please select gender.'),
Or can call Function too.
array('gender', 'ownFunction'),
public function ownFunction() {
{
if (empty($this->gender))
$this->addError("gender", 'Please select gender.');
}
}
Using this you can display custom error message on input fields
For Error Page
for Custom message in Error Page .
In your Controller
if(Your Condition)
{
//Show Error form.
throw new CHttpException(500,'We are sorry currently there are no recommendation of books at this moment. ');
}
else
{
/* rest of code goes Here */
}
Hope this Helps You