MySQL Entry to Database Not Working - php

Question

I'm going through a course on MySQL, and I'm learning how to make a user entry bit of code (email and password) where the info in the script will be put into the database on phpMyAdmin. I can't seem to get it to work? My code doesn't have any errors when I put it through an error checker. I'm also completely new to PHP and MySQL. I know it can find the database, because I can update existing data.
<?php
$link = mysqli_connect("host", "username", "password", "username");
if (mysqli_connect_error()) {
die ("There was an error connecting to the database");
}
$query = "INSERT INTO `users` (`email`, `password`) VALUES('email', 'password')";
mysqli_query($link, $query);
$query = "SELECT * FROM users";
if ($result = mysqli_query($link, $query)) {
$row = mysqli_fetch_array($result);
echo "Your email is ".$row[1]." and your password is ".$row[2];
}
?>

Answer 1

Created a refined version. Check it.
<?php
$link = mysqli_connect("host", "username", "password", "username");
if (mysqli_connect_error()) {
die ("There was an error connecting to the database");
}
$query = "INSERT INTO `users` (`email`, `password`) VALUES('email', 'password')";
$result = mysqli_query($link, $query);
if($result != false)
{
echo "The record has been successfully inserted.<br>";
}
else
{
echo "Error Occured in the INSERT query.<br>Error : ".mysqli_error($link);
}
$query = "SELECT * FROM users";
$result = mysqli_query($link, $query);
if($result != false)
{
echo mysqli_num_rows($result)." Records found.<br>";
while($rows = mysqli_fetch_array($result))
{
echo $rows["email"]."<br>";
}
}
else
{
echo "Error Occured in the SELECT query.<br>Error : ".mysqli_error($link);
}
mysqli_close($link);
?>

Answer 2

Update
It turns out I didn't set the auto_increment setting, therefore making the way I set up my database incorrect! He set up another database in the tutorials I was going through, and I found out that as he did it. Thank you everyone for the effort to help me solve my problem!

Answer 3

Why you don't try receiving them with php?
And simply make
$email= $POST['email']
$password= $POST['password']
And change the query to
$query = "INSERT INTO `users` (`email`, `password`) VALUES(" .$email. ", ". $password.")";