I have an SQL syntax error when inputing data - mysql

Question

I'm a beginner programmer and I'm getting a problem that I cannot seem to overcome. I predict it's a small syntax error but I don't know.
The code I'm using is the following:
<?php
$x=$_POST['firstname'];
$y=$_POST['lastname'];
$servername = "localhost";
$username = "root";
$password = "";
$dbname="db1";
//Create connection
$conn = new mysqli($servername, $username, $password,$dbname);
//Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
$sql = "INSERT INTO 'user' ('fname', 'lname') VALUES ('$x','$y')";
if ($conn->query($sql) === TRUE) {
echo "New record created succesfully";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}
?>
Once I press submit to input the data the following error comes up:
Connected successfullyError: INSERT INTO 'user' ('fname', 'lname') VALUES ('rty','rty')
You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ''user' ('fname', 'lname') VALUES ('rty','rty')' at line 1
Any help? Thanks in advance.

Answer 1

update your query replace single quote(') from table name and column name with (`), Like
$sql = "INSERT INTO `user` (`fname`, `lname`) VALUES ('$x','$y')";