Connect my form to SQL - php

Question

I was trying to connect a form to my but can't seem to make it work. Any help, please?
Here is the HTML
<form action="info.php" method="post">
<label for"email">Vaša e-mail adresa</label>
<input type="email" name="EMAIL" required>
<textarea name="recenzija" class="recenzija" rows="10" columns:"1" name="TEKST" required>Otkucajte ili kopirajte vaš tekst ovde (do oko 400 reči).</textarea>
<input type="submit" class="submit" name="submit" value="Pošalji">
</form
And the PHP
<?php
$servername = "mysql";
$username = "podkupol_filmski";
$password = "123";
$dbname = "podkupol_konkurs";
// Create connection
$conn = new mysqli($mysql, $podkupol_filmski, $123, $podkupol_konkurs);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "INSERT INTO konkurs (EMAIL, TEKST)
VALUES ('EMAIL', 'TEKST')";
if ($conn->query($sql) === TRUE) {
echo "Hvala!";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
$conn->close();
?>
I keep getting this message:
Connection failed: Can't connect to local MySQL server through socket
'/var/lib/mysql/mysql.sock' (111)

Answer 1

This:
$conn = new mysqli($mysql, $podkupol_filmski, $123, $podkupol_konkurs);
should be either your variables or strings, you are setting variables which you don't use but pass unset variables in you connection string.
try it like this:
$conn = new mysqli($servername, $username, $password, $dbname);
SIDENOTE:
As #developerwjk has mentioned in his comment, 'mysql' should be changed to localhost, or the actual hosts ip address.