sending form data to mySQL using get - php

Question

I want to send user entered form data to mysql via php using get.
<form action="formtosql.php" method="get">
<div class="row">
<div class="form-group col-md-4">
<label for="001">Student name:</label>
<input type="text" class="form-control" id="001" name="sname">
</div>
</div>
<div class="row">
<div class="form-group col-md-4">
<label for="002">Status:</label>
<input type="text" class="form-control" id="002" name="sstatus">
</div>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
php code looks like this:
<?php
if ($_SERVER['REQUEST_METHOD'] == 'GET'){
$name = $_GET['sname'];
$stat = $_GET['sstatus'];
// Connecting to the Database
$servername = "localhost";
$username = "root";
$password = "";
$database = "exam";
// Create a connection
$conn = mysqli_connect($servername, $username, $password, $database);
// Die if connection was not successful
if (!$conn){
die("Sorry we failed to connect: ". mysqli_connect_error());
}
else{
$sql = "INSERT INTO `estatus` (`name`, `status`, `date`) VALUES ('$name', '$stat', current_timestamp())";
$result = mysqli_query($conn, $sql);
?>
In php im getting an error while using get:
Notice: Undefined index: sname in C:\xampp\htdocs\helloworld\formtosql.php
Notice: Undefined index: sstatus in C:\xampp\htdocs\helloworld\formtosql.php
This error does not occur if I am using Post.

Answer 1

I am assuming that you have both the generation of the form, and the processing of the submitted value, in the same script here?
This error does not occur if I am using Post.
You checked the REQUEST_METHOD to determine if you are dealing with the case, that the form was submitted.
When you use method="post" on your form, you can do that - the initial request that loaded the page containing the form was used making the GET method, submitting it will use POST - so these two cases can be distinguished between using that method.
But if you use method="get", then both requests - the one used to initialy load the page, and the one used to submit the form data - are of the same method, and therefor you can not use that any more, to differentiate between the two cases.
If you give your submit button a name, then you could check (using isset/empty), whether the corresponding parameter exists - and use that to determine, which of the two cases you are dealing with.
But as already mentioned in comments - for requests that create data on the server side, you should generally use POST, not GET. Under When do you use POST and when do you use GET? you can find a more in-depth explanation of that.