Linux, Apache, MySQL, PHP

<?php session_start();
 include './header.php';
include 'connection.php';
if(isset($_POST) && count($_POST)>0) {
    $user = $_POST['username'];
    $pass = $_POST['password'];

    $sSQL = "SELECT * FROM ulog WHERE User_Name ='".$user."' AND Password = '".$pass."'";

    $result = mysql_query($sSQL) or die(mysql_error());
    $row=mysql_num_rows($result);
    if($row==1)
        {
        // Set username session variable
            $_SESSION['username'] = $_POST['username'];
            // Jump to secured page
            header('Location:index.php');
                }
}

    else
    {
        header("location:login.html");
    }



?>

<?php session_start();
include './header.php';
    // Check, if username session is NOT set then this page will jump to login page
    if (!isset($_SESSION['username']))
        {
            header('Location:login.html');
        }
 ?>
 <div id="welcome">
 <h4> Welcome <?php echo $_SESSION['username']; ?> <a href="logout.php">Logout</h4></a></p>
</div>
<div id="content">
<p>Learn to Design and Develop Website.<br />
 Learn Programing From Tutorial's teaches you the fundamentals of web development and not just programming. You will learn how to create amazing websites through programming and design tutorials. The web development tutorials on your left are designed for you to move through them in order to have an overall understanding of web design and development.</p>
</div>
<?php include './footer.php'; ?>

<?php session_start();
include 'login.php';
    // Check, if username session is NOT set then this page will jump to login page
    if (!isset($_SESSION['username']))
        {
            header('Location:login.html');
        }
 ?>

<li id="categories">
       <h2><?php _e('Categories:'); ?></h2>
       <form action="<?php bloginfo('url'); ?>" method="get">
       <div>
       <?php wp_dropdown_categories('show_count=1&hierarchical=1&taxonomy=coupon_category'); ?>
       <input type="submit" name="s" value="view" />
       </div>
       </form>
</li>

<form role="search" method="get" id="searchform" action="<?php bloginfo('siteurl'); ?>">
      <div>
<label class="screen-reader-text" for="s">Search for:</label>
        <input type="text" value="" name="s" id="s" />
      <?php wp_dropdown_categories('show_count=1&hierarchical=1&taxonomy=coupon_category'); ?>
<input type="submit" id="searchsubmit" value="Search" />
      </div>
    </form>

Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, null given

FALSE, NULL, null

is_null($result)

$query = 'SELECT CommentId, ParentId, Subject, Name, DATE_FORMAT(TimeStamp,"%k::%i %d-%m-%Y (GMT)"), Comment FROM commentdata WHERE ArticleId = ' . $ArticleId . ' ORDER BY COALESCE ( ParentId, CommentId)';
        
       
        $result = mysqli_query($connect, $query);
        
        if(TRUE == $result)
        {
            echo 'TRUE returned on query for data: ' . mysqli_error($connect) . '<br/>';
        }
                                
        if(FALSE == $result)
        {
            echo 'FALSE returned on query for data: ' . mysqli_error($connect) . '<br/>';
            mysqli_close($connect);
            die("Connection closed after FALSE returned on query for data: " . mysqli_error($connect));
        }
        
        if(NULL == $result))
        {
            echo 'NULL returned on query for data: ' . mysqli_error($connect) . '<br/>';
            mysqli_close($connect);
            die("Connection closed after NULL returned on query for data: " . mysqli_error($connect));
        }
        
        if(null == $result))
        {
            echo 'null returned on query for data: ' . mysqli_error($connect) . '<br/>';
            mysqli_close($connect);
            die("Connection closed after null returned on query for data: " . mysqli_error($connect));
        }
        
        if(is_null($result))
        {
            echo 'NULL returned on query for data: ' . mysqli_error($connect) . '<br/>';
            mysqli_close($connect);
            die("Connection closed after NULL returned on query for data: " . mysqli_error($connect));
        }
                
        /* determine number of rows in result set */
        $rowcount = mysqli_num_rows($result);

POST /Topblah.asmx HTTP/1.1
Host: client.blah.co.za
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://www.blah.co.za/CheckClient"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <CheckClient xmlns="http://www.blah.co.za/">
      <PolicyNr>string</PolicyNr>
      <IDNumber>string</IDNumber>
    </CheckClient>
  </soap:Body>
</soap:Envelope>

<a href="http://bytes.com/submit/g/#" onclick="phpfunction()"> link</a>

$instances = substr_count($string, 'Jul 5 ');

$today = date("M j");  //Jul 5
$file = file('/sda1/user/dns/log/dnsmasq.log');
$occurrences = preg_match_all('/'.$today.'/', $file);

$getText = 'Jul 5 is todays dataJul 5 is today today is Jul 5';
$occurrences =  substr_count($getText, $today); 
echo $occurrences; //3 occurrences