Fatal error: Call to undefined function: mysqli_connect()

[scrap0346]

I'm new to PHP and I'm trying to understand the basics of user authentication.  I have a book on PHP and they give the example:

[code]<?php
  $name = $_POST['name'];
  $password = $_POST['password'];

  if(!isset($_POST['name'])&&!isset($_POST['password']))
  {
    //Visitor needs to enter a name and password
?>
  <h1>Please Log In</h1>
  This page is secret
  <form method="post" action="secretdb.php">
  <table border="1">
  <tr>
    <th> Username </th>
    <td> <input type="text" name="name"> </td>
  </tr>
    <th> Password </th>
    <td> <input type="password" name="password"> </td>
  </tr>
  <tr>
    <td colspan="2" align="center">
      <input type="submit" value="Log In">
    </td>
  </tr>
  </table>
  </form>
<?php
  }
  else
  {
  // connect to mysql
  $mysql = mysqli_connect( 'localhost', 'mikemeye_webauth', 'webauth' );
  if(!$mysql)
  {
    echo 'Cannot connect to database.';
    exit;
  }
  // select the appropriate database
  $selected = mysqli_select_db( $mysql, 'auth' );
  if(!$selected)
  {
    echo 'Cannot select database.';
    exit;
  }

  // query the database to see if there is a record which matches
  $query = "select count(*) from authorized_users where
            name = '$name' and
            password = '$password'";

  $result = mysqli_query( $mysql, $query );
  if(!$result)
  {
    echo 'Cannot run query.';
    exit;
  }
  $row = mysqli_fetch_row( $result );
  $count = $row[0];
  if ( $count > 0 )
  {
    // visitor's name and password combination are correct
    echo '<h1>Here it is!</h1>';
    echo 'I bet you are glad you can see this secret page.';
  }
  else
  {
    // visitor's name and password combination are not correct
    echo '<h1>Go Away!</h1>';
    echo 'You are not autorized to view this resource.';
  }
}
?>[/code]


but when I run this, I get the error:

Fatal error: Call to undefined function: mysqli_connect() in /home/mikemeye/public_html/test/secretdb.php on line 32


I did have to manually add the database ("auth"), the username ("mikemeye_webauth"), and password ("webauth") because the script the book gave me didn't work.  Any help would be appreciated.  Thanks!

[trq]

This meens you haven't got the mysqli extension enabled or not configured properly. Change all occurences of mysqli_* to mysql_* and see if that works.

If not, read [url=http://www.phpfreaks.com/forums/index.php/topic,95378.0.html]this[/url] thread and see if that helps.