Image is not uploading in PHP. Showing my own defined error - php

Question

I am trying to upload image but getting my own exception :
Image is not valid, please select a proper image.
I reviewed my code and researched on google and in stackoverflow as well. But did not get any proper solution. It is my code given below for uploading image
.
Code :
$fetchName = "SELECT FirstNameMiddleName, LastName FROM mmb WHERE UserId = ".$_SESSION['UserId'];
$fetchNameFire = mysqli_query($conn, $fetchName);
$resultName = mysqli_fetch_assoc($fetchNameFire);
$filename = $_FILES["aadhaarphoto"]["name"]."_".$_SESSION['UserId']."_".$resultName['FirstNameMiddleName']."_".$resultName['LastName'];
$tempname = $_FILES["aadhaarphoto"]["tmp_name"];
$folder = "AadhaarCards/".$filename;
//====================================================
$allowedExtension = array('jpg','png','gif','JPG','PNG','GIF');
$ext = pathinfo($filename,PATHINFO_EXTENSION);
//====================================================
if(!in_array($ext,$allowedExtension))
{
//echo mysqli_error($conn);
echo 'Image is not valid, please select a proper image';
}
else
{
$updateUser = "UPDATE mmb SET Address = '$UserAddress', DOB = '$UserDOB', Phone = '$UserPhone', Whatsapp = '$UserWhatsapp', AadhaarCardNo = '$UserAadhaarNo', AadhaarCardPhoto = '$folder' WHERE UserId = ".$_SESSION['UserId'];
$updateUserFire = mysqli_query($conn, $updateUser);
if($updateUserFire)
{
move_uploaded_file($tempname, $folder);
}
else
{
echo mysqli_error($conn);
}
}

Answer 1

It looks like you are appending things on to the end of the file name.
$filename = $_FILES["aadhaarphoto"]["name"]."_".$_SESSION['UserId']."_".$resultName['FirstNameMiddleName']."_".$resultName['LastName'];
So if the file name was "image.jpg" it would become something like "image.jpg_123_John_Doe". The file extension is now "jpg_123_John_Doe", which is not on your list.
If you change your code like this it should work.
$ext = pathinfo($_FILES["aadhaarphoto"]["name"],PATHINFO_EXTENSION);