Function returns empty data

Question

I use this function to check whether the record exists in my database and act accordingly. There is some error in the second part when the data is not matched: it is supposed to insert a new record, but it does not insert new data, and it returns empty data. Where am I going wrong?

 class User {
function checkUser($uid, $oauth_provider, $username,$email,$twitter_otoken,$twitter_otoken_secret) 
{
 // Define database connection constants
define('DB_HOST', 'localhost');
define('DB_USER', '*********');
define('DB_PASSWORD', '********');
define('DB_NAME', '******');
 $dbc = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME);
 $query ="SELECT * FROM si_table WHERE oauth_uid = '$uid' and oauth_provider = '$oauth_provider'";
 $data=mysqli_query($dbc,$query);
 $result = mysqli_fetch_array($data);
 if (!empty($result)) {
 # User is already present
 } else {
 #user not present. Insert a new Record
 $query2 ="INSERT INTO si_table (oauth_provider, oauth_uid, user_name,email_id,twitter_oauth_token,twitter_oauth_token_secret) VALUES ('$oauth_provider',$uid,'$username','$email')";
 mysqli_query($dbc,$query2);
 $query1 ="SELECT * FROM si_table WHERE oauth_uid = '$uid' and oauth_provider = '$oauth_provider'";
 $data1=mysqli_query($dbc,$query1);
 $row = mysqli_fetch_array($data1);
 return $row;
 }
 return $result;
}
}

• Polynomial: Why are you using mysqli and concatenated query strings? Please strongly consider using parameterized queries - it is a small investment that will save you the horror of SQL injections.
• Carsten: More importantly, what's going on with the INSERT statement? That one looks wrong. Better check for errors: de3.php.net/manual/en/mysqli.error.php
• Robbie Dc: I am sorry am little ignorant about this..can you please guide me?

Answer 1

You have an error in your insert query: you are providing just 4 values for 6 fields.

Do some error checking on the return value of mysqli_query($dbc, $query2);