Page PHP reste blanche!

Bonjour,

Je me suis procuré un portail pour mon site internet qui utilise le PHP. Cependant, je ne suis pas excellent en PHP. J'ai besoin d'aide, car plusieurs pages ne s'affichent pas lorsque je clique dessus. Il n'y a aucun message d'erreur, seulement une page blanche.

Pour vous donnez une exemple : http://www.mondial.lhse.org/add_article.php

Voila les codes :

<?php include('Connections/settings.php'); ?>
<?php include("includes/sessionInfo.php") ?>
<?php include("includes/functions.php") ?>
<?php include("includes/langfile.php") ?>
<?php include("includes/langs.php") ?>
<?php
switch ($lang){
case 'en':
$l_PageTitle = "Add Article";
$l_Title = "TITLE";
$l_Summary = "SUMMARY";
$l_Content = "CONTENT";
$l_DateCreated = "DATE CREATED";
$l_Submit = "SUBMIT";
$l_Alert1 = "Please enter a title. Please keep the title lest than 30 characters.";
$l_Alert2 = "Please enter a summary. Please keep the title lest than 140 characters.";
$l_Alert3 = "Please enter the content.";
break;

case 'fr':
$l_PageTitle = "Ajouter un article";
$l_Title = "TITRE";
$l_Summary = "SOMMAIRE";
$l_Content = "CONTENU";
$l_DateCreated = "DATE DE CRÉATION";
$l_Submit = "POSTER";
$l_Alert1 = "Veuillez écrire un titre. SVP Gardez le titre à moins de 30 caractères.";
$l_Alert2 = "Veuillez écrire un sommaire. SVP Gardez le sommaire à moins de 140 caractères.";
$l_Alert3 = "Veuillez écrire le contenu.";
break;
}




$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
$editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
}



if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "form1")) {

$UPLOADED_PHOTO ="";

$uploaddir = "image/headlines/";
$uploadthumb = "image/headlines/thumb/";
$uploadfile = $uploaddir . basename($_FILES['NEW_PHOTO']['name']);
$uploadthumbfile = $uploadthumb . basename($_FILES['NEW_PHOTO']['name']);
include('includes/SimpleImage.php');

if (move_uploaded_file($_FILES['NEW_PHOTO']['tmp_name'], $uploadfile)) {
$image = new SimpleImage();
$image->load($uploadfile);
$image->resize(480,285);
$image->save($uploadfile);
$UPLOADED_PHOTO = basename($_FILES['NEW_PHOTO']['name']);
$thumb = new SimpleImage();
$thumb->load($uploadfile);
$thumb->resize(35,25);
$thumb->save($uploadthumbfile);
}else{
$UPLOADED_PHOTO = $_POST['PHOTO'];
}

$insertSQL = sprintf("INSERT INTO articles (Headline,Content,Summary,Image,DateCreated,Team,League) values (%s,%s,%s,%s,%s,%s,%s)",
GetSQLValueString($_POST['HEADLINE'], "text"),
GetSQLValueString($_POST['CONTENT'], "text"),
GetSQLValueString($_POST['SUMMARY'], "text"),
GetSQLValueString($UPLOADED_PHOTO, "text"),
GetSQLValueString(date("Y-m-d", strtotime(str_replace("/","-",$_POST['DATECREATED']))), "date"),
GetSQLValueString($_SESSION['U_ID'], "int"),
GetSQLValueString($_POST['LEAGUE'], "text"));
$Result1 = mysql_query($insertSQL, $connection) or die(mysql_error());

$last_id=mysql_insert_id();


$insertSQL = sprintf("INSERT INTO participation (DateCreated,Team,Season_ID,Type) values (%s,%s,%s,%s)",
GetSQLValueString(strftime('%Y-%m-%d', strtotime('now')), "date"),
GetSQLValueString($_SESSION['U_Name'], "text"),
GetSQLValueString($_SESSION['current_SeasonID'], "int"),
GetSQLValueString("Article", "text"));
$Result1 = mysql_query($insertSQL, $connection) or die(mysql_error());

$url = $_SESSION['DomainName'].'/news.php?article='.$last_id;

if(isset($_POST['SHARE']) && $_POST['SHARE'] != ""){
require('includes/shorturl.php');
$tinyURL = ShortUrl::create($url,'tinyurl');
$message = $_POST['HEADLINE']." - ".$tinyURL;
}

if(isset($_POST['SHARE']) && $_POST['SHARE'] == "twitter"){
require("twitter/twitteroauth.php");
/* Get user access tokens out of the session. */
$access_token = $_SESSION['access_token'];
$twittter_connection = new TwitterOAuth(TWITTER_CONSUMER_KEY, TWITTER_CONSUMER_SECRET, $access_token['oauth_token'], $access_token['oauth_token_secret']);
$response = $twittter_connection->post('statuses/update', array('status' => substr($message, 0, 140)));

} else if(isset($_POST['SHARE']) && $_POST['SHARE'] == "facebook"){
require 'facebook/facebook.php';
//facebook application
$facebook = new Facebook(array(
'appId' => APP_ID,
'secret' => APP_SECRET,
'cookie' => true,
));

//Facebook Authentication part
$user = $facebook->getUser();
if ($user) {
try {
$user = $facebook->api('/me');
//$statusUpdate = $facebook->api('/me/feed', 'post', array('message'=> $message, 'cb' => ''));
$publishStream = $facebook->api("/me/feed", 'post', array(
'message' => $_POST['HEADLINE'],
'link' => $url,
'picture' => $_SESSION['DomainName'].'/images/common/Facebook-share-icon.png',
'name' => $_SESSION['SiteName'],
'description'=> $_POST["SUMMARY"]
)
);
} catch (Exception $e) {
echo $e;
}
}
}

if ($_SESSION['current_Team_ID'] == 0) {
$updateGoTo = "index.php";
} else {
$updateGoTo = "news.php?Team=".$_SESSION['current_Team_ID']."&article=".$last_id;
}

if (isset($_SERVER['QUERY_STRING'])) {
$updateGoTo .= (strpos($updateGoTo, '?')) ? "&" : "?";
$updateGoTo .= $_SERVER['QUERY_STRING'];
}
header(sprintf("Location: %s", $updateGoTo));
}
?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title><?php echo $l_PageTitle;?> - <?php echo $_SESSION['SiteName'] ; ?></title>

<link rel="shortcut icon" type="image/png" href="<?php echo $_SESSION['DomainName']; ?>/image/<?php echo $_SESSION['FavIcon'];?>" />
<link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/reset.css">
<link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/html5.css">
<link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/jquery.accessible-news-slider.css" />
<link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/menu.css"><link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/jquery-ui-1.8.custom.css" />
<link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/header.css" />
<link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/tipsy.css">
<link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/bubbletip.css" />
<link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/datePicker.css" />
<link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/date.css" />


<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/jquery-1.5.1.min.js"></script>
<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/formly.min.js"></script>
<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/jquery.accessible-news-slider.js"></script>
<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/jquery.pop.js"></script>
<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/jquery.tipsy.js"></script>
<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/jquery.ui.core.js"></script>
<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/jquery.ui.widget.js"></script>
<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/jquery.ui.datepicker.js"></script>
<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/jquery-ui-1.8.custom.min.js"></script>
<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/date.js"></script>

<?php if(isset($_SESSION['username'])){ ?>
<link rel="stylesheet" type="text/css" href="<?php echo $_SESSION['DomainName']; ?>/css/chat.css" />
<script type="text/javascript" src="<?php echo $_SESSION['DomainName']; ?>/js/chat.js"></script>
<?php } ?>

<!--[if lte IE 9]>
<script src="<?php echo $_SESSION['DomainName']; ?>/js/html5.js" type="text/javascript"></script>
<script src="<?php echo $_SESSION['DomainName']; ?>/js/jquery.bgiframe.min.js" type="text/javascript"></script>
<![endif]-->

<script type="text/javascript">
$(function(){
$('#cssdropdown li.headlink').hover(
function() { $('ul', this).css('display', 'block'); },
function() { $('ul', this).css('display', 'none'); });
$('.date-pick').datepicker().val(new Date().asString()).trigger('change');
});;
</script>
<script language="javascript">
function checkit(){
if (document.form1.HEADLINE.value.length==0){
alert("<?php echo $l_Alert1;?>");
return false;
}
if (document.form1.SUMMARY.value.length==0){
alert("<?php echo $l_Alert2;?>");
return false;
}
}
</script>
<style media="all" type="text/css">
#container {background-image:url(<?php echo $_SESSION['DomainName']; ?>/image/headers/<?php echo $_SESSION['current_HeaderImage']; ?>); background-color:#<?php echo $_SESSION['current_PrimaryColor'];?>;}
a {color:#<?php echo $_SESSION['current_PrimaryColor']; ?>;}
table.tablesorter thead tr th { background-color: #<?php echo $_SESSION['current_SecondaryColor']; ?>; color:#<?php echo $_SESSION['current_TextColor']; ?>;}
table.tablesorterRates thead tr th { background-color: #<?php echo $_SESSION['current_SecondaryColor']; ?>; color:#<?php echo $_SESSION['current_TextColor']; ?>;}
table.tablesorter thead tr th a{ color:#<?php echo $_SESSION['current_TextColor']; ?>;}
table.tablesorterRates thead tr th a{ color:#<?php echo $_SESSION['current_TextColor']; ?>;}
footer { background-color:#<?php echo $_SESSION['current_PrimaryColor']; ?>;}
#FatFooter { background-color:#<?php echo $_SESSION['current_SecondaryColor']; ?>; color:#<?php echo $_SESSION['current_TextColor']; ?>;}
<?php if ($_SESSION['current_SecondaryColor'] == $_SESSION['current_PrimaryColor']){ echo "#FatFooter a { color:#".$_SESSION['current_TextColor']."; } "; } ?>
h3 {color:#<?php echo $_SESSION['current_PrimaryColor']; ?>;}
#cssdropdown, #cssdropdown ul {background-color:#<?php echo $_SESSION['current_PrimaryColor']; ?>;}
nav {background-color:#<?php echo $_SESSION['current_PrimaryColor']; ?>;}
</style>
</head>

<body>
<div align="center">
<div id="wrapper">
<?php include("includes/header.php"); ?>
<?php include("includes/nav.php"); ?>

<article>
<!-- RIGHT HAND SIDE BAR GOES HERE -->
<!--<aside></aside>-->

<!-- MAIN PAGE CONTENT GOES HERE -->
<section>

<h1><?php echo $l_PageTitle;?></h1>
<br />
<form method="post" name="form1" enctype="multipart/form-data" action="<?php echo $editFormAction; ?>" onsubmit='return checkit()'>

<div class="rowElem">
<label for="HEADLINE"><?php echo $l_Title;?>:</label>
<input type="text" name="HEADLINE" size="80" maxlength="255">
</div>

<div class="rowElem">
<label for="SUMMARY"><?php echo $l_Summary;?>:</label>
<input type="text" name="SUMMARY" size="80" maxlength="255">
</div>

<div class="rowElem">
<label for="CONTENT"><?php echo $l_Content;?>:</label>
<div style="margin-left:140px;">
<?php
if ($_SESSION['RichTextEditor'] == 0){
echo "<textarea name='CONTENT' cols='50' rows='10'></textarea>";
} else {
// Include CKEditor class.
include_once "ckeditor/ckeditor.php";
// The initial value to be displayed in the editor.
$initialValue = '<p>This is some <strong>sample text</strong>.</p>';
// Create class instance.
$CKEditor = new CKEditor();
// Path to CKEditor directory, ideally instead of relative dir, use an absolute path:
// $CKEditor->basePath = '/ckeditor/'
// If not set, CKEditor will try to detect the correct path.
$CKEditor->basePath = 'ckeditor/';
$CKEditor->config['width'] = 800;
// Create textarea element and attach CKEditor to it.
$CKEditor->editor("CONTENT","");
}
?></div>
</div>

<div class="rowElem">
<label for="PHOTO">PHOTO:</label>
<select name="PHOTO" size="1">
<option value="<?php echo $_SESSION['current_HeadlineImage'];?>" selected="selected"><?php echo $_SESSION['current_HeadlineImage'];?> (Default)</option>
<?php
$dir = "image/headlines/";

// Open a known directory, and proceed to read its contents
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {

echo "<option value='".$file."'>".$file."</option>";
}
closedir($dh);
}
}
?>
</select>

<div class="rowElem">
<label for="NEW_PHOTO">UPLOAD PHOTO:</label>
<input type="file" name="NEW_PHOTO">
</div>

<div class="rowElem">
<label for="LEAGUE">LEAGUE NEWS:</label>
<select name="LEAGUE" size="1">
<option value="True" selected>Add to league news rotator</option>
<option value="False">Team news only</option>
</select>
</div>

<div class="rowElem">
<label for="DATECREATED"><?php echo $l_DateCreated;?>:</label>
<input name="DATECREATED" id="DATECREATED" class="date-pick" />
</div>

<?php if(isset($_SESSION['oauth_provider']) && $_SESSION['oauth_provider'] == 'twitter'){?>
<div class="rowElem">
<input name="SHARE" type="checkbox" value="twitter" /> <img src="image/common/tweet.png" width="55" height="20" alt="Tweet">
<label for="SHARE"></label>
</div>
<?php } else if (isset($_SESSION['oauth_provider']) && $_SESSION['oauth_provider'] == 'facebook'){?>
<div class="rowElem">
<input name="SHARE" type="checkbox" value="facebook" /> <img src="image/common/fb_share.png" width="59" height="18" alt="Share">
<label for="SHARE"></label>
</div>
<?php } else { ?>
<input name="SHARE" type="hidden" value="" />
<?php } ?>


<br /><br />
<br /><br />

<div class="rowElem">
<label for="submit"></label>
<input type="submit" value="<?php echo $l_PageTitle;?>" class="button add">
</div>
<br /><br />

<input type="hidden" name="MM_insert" value="form1">
</form>

</section>
</article>

<?php include("includes/footer.php"); ?>
<?php include("includes/statusBar.php"); ?>
</div>
</div>
</body>
</html>