<?php

if(isset($_GET['id']) && ctype_digit($_GET['id'])){
    $id = $_GET['id'];
} else{
    header('location: select.php');
}

$db = new mysqli(
    'localhost',
    'user1',
    'password1',
    'php');

$sql = "DELETE FROM users WHERE id = $id";
$db->query($sql);
echo'User deleted';

?>

<?php
   readfile('header.tmpl.html');
?>
<ul>
<?php
  readfile( 'config.inc.php)';
 

  $db = new mysqli(MYSQL_HOST,MYSQL_USER,MYSQL_PASSWORD,MYSQL_DATABASE);
  $sql = 'SELECT * FROM users';
  $result = $db->query($sql);

  foreach ($result as $row) {
      printf(
        '<li><span style="color: %s">%s (%s)</span>
        <a href="update.php?id=%s">update</a>
        <a href="delete.php?id=%s">delete</a>
        </li>',
        htmlspecialchars($row['color'], ENT_QUOTES),
        htmlspecialchars($row['name'], ENT_QUOTES),
        htmlspecialchars($row['gender'], ENT_QUOTES),
        htmlspecialchars($row['id'], ENT_QUOTES),
        htmlspecialchars($row['id'], ENT_QUOTES)
      );
  }

  $db->close();
?>
</ul>
<?php 
 readfile('footer.tmpl.html');
?>

<?php 
 
 $y =20;

 if($y == 20){

    const X = 30;
 }
 echo X;

<?php
$a = 8;
$b =8;
$c = 17;
$d = 26;

if(($a == $b)  xor( $d > $c )){
    echo 'true';
} else{
    echo 'false';
}