Update mysql function to mysqli - php

Question

I would like to update this code to be mysqli, but dont know where to begin.
I know that the connection is handled like this , buts thats as far as iv got.
$connection = mysqli_connect('localhost', 'admin', 'admin', 'database_name');
Function to be updated:
$cn=mysql_connect('localhost', 'admin', 'admin') or die(mysql_error());
mysql_select_db('database_name',$cn) or die(mysql_error());
$sql = "SELECT name FROM category";
$rs = mysql_query($sql) or die(mysql_error());
echo "<select>";
while($row = mysql_fetch_array($rs)){
echo "<option value='".$row["name"]."'>".$row["name"]."</option>";
}mysql_free_result($rs);
echo "</select>";
<?php
$sql = mysqli_query($connection, 'SELECT name FROM category');
echo "<select>";
while($row = mysqli_fetch_array($sql)){
echo "<option value='".$row["name"]."'>".$row["name"]."</option>";
}mysql_free_result($sql);
echo "</select>";
?>

Answer 1

$cn=mysqli_connect('localhost', 'admin', 'admin','database_name') or die(mysqli_error($cn));
$sql = "SELECT name FROM category";
$rs = mysqli_query($cn,$sql) or die(mysqli_error($cn));
echo "<select>";
while($row = mysqli_fetch_array($rs)){
echo "<option value='".$row["name"]."'>".$row["name"]."</option>";
}mysqli_free_result($rs);
echo "</select>";
You can learn about mysqli on PHP's website Mysqli Book
But for security and other benefits you should now use PDO instead