check before inserting data is already existed or not - php

Question

When i click first time inserting new data second time click that time it is not checking
function post($payload)
{
$stmt = $this->db->prepareQuery("SELECT * FROM user WHERE emailId= ? or phone= ?");
$stmt->bind_param('ss', $payload->email, $payload->phone);
$stmt->execute();
$result = $stmt->get_result();
while ($rows=$result->fetch_assoc())
{
if($rows['emailId']!=$payload->email || $rows['phone']!=$payload->phone)
{
$stmt = $this->db->prepareQuery("insert into user(emailId,phone,name,city,category_id,password) values(?,?,?,?,?,?)");
$stmt->bind_param('ssssds', $payload->email, $payload->phone, $payload->name, $payload->city, $payload->categ, $payload->pwd);
$stmt->execute();
$stmt->close();
$this->db->commit();
return $payload;
}
else
{
$stmt->close();
echo "Already existed";
return $payload;
}
}
}

Answer 1

You are checking for the record like you know its going to be in the first row. How about introduce another variable say $duplicate
$duplicate = false;
while ($rows=$result->fetch_assoc())
{
if($rows['emailId']==$payload->email || $rows['phone']==$payload->phone)
{
$duplicate = true;
break;
}
}
if(!$duplicate){
$stmt = $this->db->prepareQuery("insert into
user(emailId,phone,name,city,category_id,password) values(?,?,?,?,?,?)");
$stmt->bind_param('ssssds', $payload->email, $payload->phone, $payload->name,
$payload->city, $payload->categ, $payload->pwd);
$stmt->execute();
$stmt->close();
}
else{
echo "Duplicate";
}