Failed to get data from localhost using php in android - php

Question

Im new at Android. I'm trying to fetch some data from localhost server. My query is running perfectly on phpMyAdmin But I facing error in api. I have very little knowledge about Php so did not get what the issue is.
Code:
public function saveUserProgress($user_id,$course_id,$topic_id,$quiz_marks){
$output = $this->con->prepare("INSERT INTO user_progress (user_id, course_id, topic_id,quiz_marks)
VALUES (?, ?, ?,?)
ON DUPLICATE KEY UPDATE
user_id=?, course_id=?, topic_id=?, quiz_marks = quiz_marks + ?");
$output->bind_param("iiii",$user_id,$course_id,$topic_id,$quiz_marks);
if($output->execute()){
return PROGRESS_SAVED;
}else{
return ERROR_OCCUR;
}
}
Error:
{"error":true,"message":403}
Warning: mysqli_stmt::bind_param(): Number of variables doesn't match number of parameters in prepared statement

Answer 1

If as you said your unique key is user_id and course_id then you do not need to update them on duplicate key. You only need to update the remaining 2 values. Together with the 4 you wanted to add it makes 6 placeholders, so you need to bind 6 variables.
$output = $this->con->prepare("INSERT INTO user_progress (user_id, course_id, topic_id,quiz_marks)
VALUES (?, ?, ?, ?)
ON DUPLICATE KEY UPDATE
topic_id=?, quiz_marks = quiz_marks + ?");
$output->bind_param("iiiiii", $user_id, $course_id, $topic_id, $quiz_marks, $topic_id, $quiz_marks);