Data does not being sent to Database because it cannot be read - php

Question

I'm working on a project where I need to send some data to the remote database. So I'm developing an iOS app using Swift 3.1 and when I try to send data to the database it says,
The data couldn’t be read because it isn’t in the correct format.
Also there is another error;
Error Domain=NSCocoaErrorDomain Code=3840 "No value." UserInfo={NSDebugDescription=No value.}
This is my swift code:
let urlOfSMARTCF = URL(string: "http://192.168.1.99/insertData.php")
let request = NSMutableURLRequest(url: urlOfSMARTCF! as URL)
request.httpMethod="POST"
request.addValue("application/json", forHTTPHeaderField: "Accept")
for contact in contactsCaptuure
{
let userMobileNumber = DBManager.shared.retriveRegisteredNumberOfMobile()
let postParameters = "{\"usermobilenum\":\(String(describing: userMobileNumber!)),\"contactnum\":\(contact.phoneNumber!)}";
request.httpBody = postParameters.data(using: String.Encoding.utf8)
let task = URLSession.shared.dataTask(with: request as URLRequest)
{
data, response, error in
if error != nil
{
print("error is \(String(describing: error))")
return;
}
do
{
let myJSON = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
if let parseJSON = myJSON
{
var msg : String!
msg = parseJSON["message"] as! String?
print(msg)
}
}
catch
{
print(error.localizedDescription)
print(error)
}
}
print("Done")
task.resume()
}
This is my PHP in remote database:
<?php
if($_SERVER["REQUEST_METHOD"]=="POST")
{
require 'connectDB.php';
$userPhone = $_POST["usermobilenum"];
$contactNum = $_POST["contactnum"];
$query = "SELECT * FROM user WHERE UserMobNum='".$userPhone."'"; // Usermobile is registered.SIP exists.
if($results= mysqli_query($connect,$query))
{
if(mysqli_num_rows($results)>0)
{
$i=0;
while($rows=mysqli_fetch_assoc($results))
{
$sip[$i] = $rows["SIP"];
$i++;
}
$queryToAddData = "INSERT INTO user (UserMobNum,SIP,Phone) VALUES ('".$userPhone."','".$sip[0]."','".$contactNum."')";
if(mysqli_query($connect,$queryToAddData))
{
//Return success message to the app
echo "Success"
}
else
{
die(mysqli_error($connect));
}
}
else
{
$availableSIP=false;
while($availableSIP==false) // Assign a random value until it's being a valid one.
{
$sip[0]=rand(1,9999);
$queryToCheck = "SELECT * FROM user WHERE SIP='".$sip[0]."'";
if($results= mysqli_query($connect,$queryToCheck))
{
if(mysqli_num_rows($results)==0)
{
$availableSIP=true;
}
}
}
$queryToAddData = "INSERT INTO user (UserMobNum,SIP,Phone) VALUES ('".$userPhone."','".$sip[0]."','".$contactNum."')";
if(mysqli_query($connect,$queryToAddData))
{
//Return success message to the app
echo "Success"
}
else
{
die(mysqli_error($connect));
}
}
}
else
{
echo "First Level Failure!";
die(mysqli_error($connect));
}
mysqli_close($connect);
}
else
{
echo "Failed in POST Method"
}
?>
What I did
Went through all of stack overflow and other site suggestions but had no luck. I even checked my jSon string using a json validator and it passed. This is how my jSon string looks like.
{"usermobilenum":1234567890,"contactnum":9345}
However after some search I found that this happens because Remote database PHP sends this error message. So I checked each and every variable in PHP but couldn't find any problem. Also this couldn't be a problem with PHP cause I work with those exact php files when I connect to via my android app. That works fine. But in iOS it generates that error. Can someone help me please?
UPDATE
This is insertdataTest.php file:
<?php
if($_SERVER["REQUEST_METHOD"]=="POST")
{
$userPhone = $_POST["usermobilenum"];
echo $userPhone;
mysqli_close($connect);
}
else
{
echo json_encode("Failed in POST Method");
}
?>

Answer 1

{"usermobilenum":1234567890,"contactnum": 9345} - this is treated as a String. It's not a VALID JSON.
Updated code:
let urlOfSMARTCF = URL(string: "http://192.168.1.99/insertData.php")
let request = NSMutableURLRequest(url: urlOfSMARTCF! as URL)
request.httpMethod="POST"
request.addValue("application/json", forHTTPHeaderField: "Accept")
for contact in contactsCaptuure {
let userMobileNumber = DBManager.shared.retriveRegisteredNumberOfMobile()
let postParameters = NSMutableDictionary()
postParameters["usermobilenum"] = userMobileNumber
postParameters["contactnum"] = contact.phoneNumber!
let jsonData = try? JSONSerialization.data(withJSONObject: postParameters, options: .prettyPrinted)
request.httpBody = jsonData
let task = URLSession.shared.dataTask(with: request as URLRequest) {
data, response, error in
if error != nil {
print("error is \(String(describing: error))")
return;
}
do {
let myJSON = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? [String: Any]
if let parseJSON: NSMutableDictionary = NSMutableDictionary(dictionary: myJSON as! NSMutableDictionary){
let msg = parseJSON["message"] as! String
print(msg)
}
}
catch {
print(error.localizedDescription)
print(error)
}
}
print("Done")
task.resume()
}

Answer 2

Buddy I debug you code and found that there is error in server response not in you code. try this and reply me ASAP please
before this line "let myJSON = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary"
add "let str = String.init(data: data!, encoding: .utf8)
print(str ?? "error")"
I am waiting please.