Volley upload image using PHP - php

Question

I am trying to upload image from android app using Google Volley to the server but for some reason the SQL command to insert the URL to database and upload doesn't work. The rest of the commands as well as the code in android seems to be working. But the response is incorrect. Check the else statement below highlighted by comment, that statement is executed for some reason whatever I do.
<?php
if($_SERVER['REQUEST_METHOD']=='POST'){
$image = $_POST['image'];
$name = $_POST['name'];
...
$conn = mysqli_connect(HOST,USER,PASS,DB) or die('unable to connect to db');
$sql ="SELECT id FROM volleyupload ORDER BY id ASC";
$res = mysqli_query($conn,$sql);
$id = 0;
while($row = mysqli_fetch_array($res)){
$id = $row['id'];
}
$path = "uploads/$id.png";
$actualpath = "http://myurl.co/prak/$path";
$sql = "INSERT INTO volleyupload (photo,name) VALUES ('$actualpath','$name')";
if(mysqli_query($conn,$sql)){
file_put_contents($path,base64_decode($image));
echo "Successfully Uploaded";
} else{
echo "ERROR in insertion to DB!"; //THIS ERROR COMES UP
}
mysqli_close($conn);
}else{
echo "Error";
}
?>
The tutorial I am following for volley image upload is here: https://www.simplifiedcoding.net/android-volley-tutorial-to-upload-image-to-server/
Please let me know what's the problem and if there is an issue with the question do let me know that as well.

Answer 1

Fact that else branch is always entered means that mysqli_query($conn,$sql) function result is FALSE.
This is most likely caused by problem with your SQL statement. Fortunately there is a way to find out where exactly the problem origins - you can use mysqli_error($conn) to find out where the issue is exactly.
Possibly by adjusting your code to something like this:
if(mysqli_query($conn,$sql)){
file_put_contents($path,base64_decode($image));
echo "Successfully Uploaded";
} else{
echo "ERROR in insertion to DB:" . mysqli_error($conn); //THIS ERROR COMES UP
}