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Thread: Dynamic CMS problem

  1. #1

    Thread Starter
    New Member
    Join Date
    Apr 2012
    Posts
    4

    Dynamic CMS problem

    I am using PHP and MySQL to build a dynamic CMS. I am really new to this. I set up my SQL database with the following
    web_pages
    id page_title url content

    These files have the following codes:

    //header.php
    <?php
    //Variables for the database

    $host = 'localhost';
    $username = '###########';
    $password = '######';
    $dbname = '###########';
    ?>

    //nav.php
    $conn = mysqli_connect($host, $username, $password, $dbname) or die('Error connecting to MySQL server.');

    $sql = "SELECT id, page_title, url FROM web_pages;";
    $result = mysqli_query($conn, $sql) or die('Error querying database.');

    //loop through the page titles to populate the navigation bar
    while ($row = mysqli_fetch_array($result)) {
    $page_title = $row['page_title'];
    $url = $row['url'];
    echo "<ul><li><a href=' " . $row['id'] . " '> " . $row['page_title'] . "</a></li></ul>";
    }

    mysqli_close($conn);

    ?>


    //default.php
    <header>
    <?php
    require_once("header.php");
    require_once("nav.php");
    ?>
    </header>

    <!-- +++++++++++++++++++++++ CONTENT +++++++++++++++++++++ -->

    <div id="content">
    <?php
    $conn = mysqli_connect($host, $username, $password, $dbname) or die('Error connecting to MySQL server.');

    $sql = "SELECT page_title, url, content FROM web_pages WHERE content = '$content';";
    $result = mysqli_query($conn, $sql) or die('Error querying database.');

    while ($row = mysqli_fetch_array($result)) {
    $id = $row['id'];
    $page_title = $row['page_title'];
    $url = $_GET['url'];
    $content = $row['content'];
    }

    if(!isset($_GET['id'])) {

    echo $row['content'];
    }
    else
    echo "default.php";
    mysqli_close($conn);
    ?>

    </div>

    Rather than the user click on the navigation and it directing to a new non-existant page I want the content from the database to show up in the content section of the default page.

    PLEASE HELP!! I need to get this working by tonight!

  2. #2
    Frenzied Member
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    Apr 2009
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    CA, USA
    Posts
    1,500

    Re: Dynamic CMS problem

    In this query:
    Code:
    $sql = "SELECT page_title, url, content FROM web_pages WHERE content = '$content';";
    ... $content doesn't appear to have been created beforehand; where do you expect to get this variable from? Seems like a logic problem too: if you've already got the page's content, you wouldn't need to query for it.

    A common pattern for this sort of thing is using row IDs to fetch content. For example, you have the url "default.php?page_id=2" and you query for the content where ID is 2.

  3. #3

    Thread Starter
    New Member
    Join Date
    Apr 2012
    Posts
    4

    Re: Dynamic CMS problem

    I finally managed to at least stay on the same page at this point. Still don't know how to fetch the content. How do you do it?


    Code:
    //NAVIGATION
    	$conn = mysqli_connect($host, $username, $password, $dbname) or die('Error connecting to MySQL server.');
    	
    	//select the url
    	$sql = "SELECT * FROM web_pages;";
    	$result = mysqli_query($conn, $sql) or die('Error querying database.');
    	
    	//loop through the page titles to populate the navigation bar
    	while ($row = mysqli_fetch_array($result)) {
    		$page_title = $row['page_title'];
    		$url = $row['url'];
    		$content = $row['content'];
    		//echo "<ul><li><a href=' " . $row['id'] . " '> " . $row['page_title'] . "</a></li></ul>"; 
    		echo '<a href="default.php?content='.$row["id"].'">'.$row["page_title"].'</a>';
    	} 
    	  
    	mysqli_close($conn);
    
    
    //CONTENT
    $conn = mysqli_connect($host, $username, $password, $dbname) or die('Error connecting to MySQL server.');
    					
    //select the url
    $sql = "SELECT * FROM web_pages WHERE id = ".$_GET['content'];
    $result = mysqli_query($conn, $sql) or die('Error querying database.');
    					
    //loop through the page titles to populate the navigation bar
    while ($row = mysqli_fetch_array($result)) {
    	$id = $row['id'];
    	$page_title = $row['page_title'];
    	$url = $_GET['url'];
    	$content = $row['content'];
    }
    					
    if(!isset($_GET['id'])) {
    	echo $row['page_title'];
    	echo $row['content'];	
    }
    else
    	echo "default.php";
    	mysqli_close($conn);

  4. #4

    Thread Starter
    New Member
    Join Date
    Apr 2012
    Posts
    4

    Re: Dynamic CMS problem

    Here is my revised code:

    I can get the default.php template stay put but my content is saying error querying database. I wonder why?

    NAVIGATION
    Code:
    <?php
            //Connect to the db
            $conn = mysqli_connect($host, $username, $password, $dbname) or die('Error connecting to MySQL server.');
            
            //select the url
            $sql = "SELECT * FROM web_pages;";
            $result = mysqli_query($conn, $sql) or die('Error querying database.');
            
            //loop through the page titles to populate the navigation bar
            while ($row = mysqli_fetch_array($result)) {
            
                    echo '<ul><li><a href="default.php?id='.$row["id"].'">'.$row["page_title"].'</a></li></ul>';
            } 
              
            mysqli_close($conn);
    ?>
    CONTENT
    Code:
    <?php
    $conn = mysqli_connect($host, $username, $password, $dbname) or die('Error connecting to MySQL server.');
                                            
    //select the url
    $sql = "SELECT * FROM web_pages WHERE id = $_GET[id]";
    $result = mysqli_query($conn, $sql) or die('Error querying database.');                                 
                                            
    //loop through the page titles to populate the content box
    while ($row = mysqli_fetch_array($result)) {
            $id = $row['id'];
            $page_title = $row['page_title'];
            $url = $row['url'];
            $content = $row['content'];
    }
    mysqli_close($conn);
                                            
    ?>
                        
    <?php 
            echo '<tr><td>' . $row['page_title'] . '</td>
            <td>' . $row['content'] . '</td>';
    ?>

  5. #5
    PowerPoster lintz's Avatar
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    The 19th Hole
    Posts
    2,697

    Re: Dynamic CMS problem

    Remove the ; after the query.

    Code:
    $sql = "SELECT * FROM web_pages";

  6. #6
    Freelancer akhileshbc's Avatar
    Join Date
    Jun 2008
    Location
    Trivandrum, Kerala, India
    Posts
    7,572

    Re: Dynamic CMS problem

    Try changing this line:
    Code:
    $sql = "SELECT * FROM web_pages WHERE id = $_GET[id]";
    to:
    Code:
    $sql = "SELECT * FROM web_pages WHERE id = {$_GET['id']}";
    Or to:
    Code:
    $id = $_GET['id'];
    $sql = "SELECT * FROM web_pages WHERE id = $id";

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