[Problems with mysql and phpmyadmin]

I have a db.php and inside it I filled out all the info needed:

<?php
define('DB_HOST', 'example.com');
define('DB_NAME', 'database_name');
define('DB_USERNAME', 'user_name');
define('DB_PASSWORD', '*******');

$odb = new PDO('mysql:host=' . DB_HOST . ';dbname=' . DB_NAME, DB_USERNAME, DB_PASSWORD);
?>

My problem is with the DB_HOST, is that my direct URL to the site? for example, google.com or is it like an IP?

 

[just one CSS question, please?]

If they're just images and not going to be like buttons or anything, just make all 4 images into one big image using Photoshop, then it will be more efficient and you will only need one div.

[Not sending me email]

What does your script do?  Where does it go wrong?  Try putting in some messages to help you see the path it is taking.

Well I tried putting in messages but they dont work -.-

[Not sending me email]

I am creating a forgotten password button, it works but it just doesn't send me an email containing the reset link.

Here's the code for the email part:

<?php

require("../config.php");

if($_GET['code'])
{
	$get_username = $_GET['username'];
	$get_code = $_GET['code'];
	
	$query = mysql_query("SELECT * FROM users WHERE username='$get_username'");
	
	while($row = mysql_fetch_assoc($query))
	{
		$db_code = $row['passreset'];
		$db_username = $row['username'];
	}
	if($get_username == $db_username && $get_code == $db_code)
	{
		echo "
		
		<form action='pass_reset_complete.php?code=$get_code' method='POST'>
			Enter a new password<br><input type='password' name='newpass'><br>
			Re-enter your password<br><input type='password' name='newpass1'><p>
			<input type='hidden' name='username' value='$db_username'>
			<input type='submit' value='Update Password!'>
		</form>
		
		";
	}
	
}

if(!$_GET['code'])
{
echo "

<form action='forgot_pass.php' method='POST'>
	Enter your username<br><input type='text' name='username'><p>
	Enter your email<br><input type='text' name='email'><p>
	<input type='submit' value='Submit' name='submit'>
</form>

";

if(isset($_POST['submit']))
{
	$username = $_POST['username'];
	$email = $_POST['email'];
	
	$query = mysql_query("SELECT * FROM users WHERE username='$username'");
	$numrow = mysql_num_rows($query);
	
	if($numrow!=0)
	{
		while($row = mysql_fetch_assoc($query))
		{
			$db_email = $row['email'];
		}
		if($email == $db_email)
		{
			$code = rand(10000,1000000);
			
			$to = $db_email;
			$subject = "Password Reset";
			$body = "
			
			This is an automated email. Please DO NOT reply to this email.
			
			Click the link below or paste it into your browser
			http:/www.***REMOVED***.com/second/forgot_pass.php?code=$code&username=$username
			
			";
			
			mysql_query("UPDATE users SET passreset='$code' WHERE username='$username'");
			
			mail($to,$subject,$body);
			
			echo "Check Your Email";
		}
		else
		{
			echo "Email is incorrect";	
		}
	}
	else
	{
		echo "That username doesnt exist";	
	}
}
}
?>

[Access denied page]

I want to make it so public users cant access the index of/ page, how do I do that?

Thanks

[Need a little help]

Whats this got to do with PHP? This is a CSS issue.

 

Moved to CSS Help

Sorry I told you I was a newb -.-

[Need a little help]

So I am a complete newb at PHP coding and need help.

Here is the form I am trying to modify...

http://i.gyazo.com/430a43e1de5629e2ccb8a386f177c23e.png

I am trying to make the black border fill most of the screen rather a little bit.

 

This is the code for the whole box.

<div id="app" class="col-md-5">
				<div class="panel panel-default">
					<div class="panel-heading">
						<h1 class="panel-title">Search Box</h1>
					</div>
					<div class="panel-body">
						<form id="search" data-validate="parsley" class="form-horizontal" role="form" />
							<div class="form-group">
								<label for="url" class="col-lg-2 control-label">URL</label>
								
								</div>
							
								</div>
							<div class="error-container alert alert-danger">
							</div>
							<div class="form-group">
								<div class="col-lg-offset-2 col-lg-10 text-right">
									<button id="crawl" type="submit" class="btn btn-primary btn-lg">Search <span class="glyphicon glyphicon-search"></span></button>
								</div>
							</div>
						</form>
					</div>
				</div>
			</div>

Please tell me how. 

Thanks!