Sur une ma page.php je propose un lien pour le télécharger un fichier PDF.
Le téléchargement s’effectue bien mais à chaque fois que je tente d'ouvrir ce fichier (dont l'original bien sûr fonctionne parfaitement), je reçois le message suivant :

"Acrobat n'a pas pu ouvrir exemple.pdf, car le type de fichier n'est pas pris en charge ou le fichier est endommagé (il a été envoyé en tant que pièce jointe et n'a pas été décodé correctement, par exemple). Pour créer un document Adobe PDF, ouvrez l'application source, puis imprimez le document vers Adobe PDF."

voici mon code:

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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<?php
 
/**
 * Classe du composant Download
 */
class Com_Download extends Component
{
 
    /**
     * Telecharge le document selectionné
     * 
     */
    public function download($fileId)
    {
        $res = false;
        try {
        $res = $this->getListOfFiles(null, array("id='" . $this->dbHandle->escape($fileId)."'"));
        }
        catch(DbException $ex)
        {
            //TODO : gerer l'exception
        }
 
        if (! (is_array($res) && sizeof($res)==1 && file_exists($res[0]["linkfile"])) )
        {
            header("location:./");
            exit();
        }
        $res = $res[0];
        $file = $res["linkfile"];
 
        $type = "application/octet-stream";
        switch (strrchr(basename($file), "."))
        {
            case ".gz": $type = "application/x-gzip";
                break;
            case ".tgz": $type = "application/x-gzip";
                break;
            case ".zip": $type = "application/zip";
                break;
            case ".pdf": $type = "application/pdf";
                break;
            case ".png": $type = "image/png";
                break;
            case ".gif": $type = "image/gif";
                break;
            case ".jpg": $type = "image/jpeg";
                break;
            case ".txt": $type = "text/plain";
                break;
            case ".htm": $type = "text/html";
                break;
            case ".html": $type = "text/html";
                break;
            case ".doc": $type = "application/msword";
                break;
            default: $type = "application/octet-stream";
                break;
        }
 
        //Telechargement du fichier	
        if (headers_sent() || ob_get_contents())
        {
            die('Some data has already been output, can\'t send file');
        }
 
        $header = "Content-Disposition: attachment; filename=" . basename($file);
        header("Content-Type: application/force-download");
        header("Content-Transfer-Encoding: " . $type . "\n");
        header("Content-Length: " . filesize($file));
        header("Pragma: no-cache");
        header($header); 
        header("Cache-Control: must-revalidate, post-check=0, pre-check=0, public");
        header("Expires: 0");
        readfile($file);
 
        $this->dbHandle->query("update file set countdown=countdown+1 where id='" . $this->dbHandle->escape($fileId) . "'");
    }
 
    /**
     * Recupere la liste des annees dans la table articlede presse
     * 
     * @return array $listOfYears Liste des annees de publication des articles de presse
     */
    function getListOfYears($idcat)
    {
        $query = "SELECT distinct year(datepubl) as annee, count(*) as total FROM file where idcat ='" . $this->dbHandle->escape($idcat) . "' group by year(datepubl) order by year(datepubl) desc";
        $result = $this->dbHandle->query($query);
        $listOfYears = array();
        if ($result)
        {
            while ($oneYear = $this->dbHandle->nextRecord())
            { // ($result, MYSQL_ASSOC))
                $listOfYears[$oneYear['annee']] = $oneYear;
            }
        }
        return $listOfYears;
    }
 
    /**
     * retourne la liste des fichiers d'une categorie precise 
     * ou l'ensemble des fichers disponibles
     * 
     * @param int $idcat Identifiant de la categorie, -1 pour toutes categories confondues
     * @param string $annee
     * @param boolean $isMd5Key
     * @return array $listOfPictures
     */
    function getListOfFiles(array $columns=null, array $where=null, array $orderby=null, $fromLimite = 0, $toLimite = NULL)
    {
        $query = null;
        try
        {
            $query = DbConnector::prepareQueryString("file", $columns, $where, $orderby, $fromLimite, $toLimite);
        }
        catch (Exception $ex)
        {
            return array();
        }
 
        try
        {
            return $this->dbHandle->queryAllRecords($query);
        }
        catch (Exception $ex)
        {
            return array();
        }
    }
 
    /**
     * Methode d'affichage du contenu de la page
     * 
     * @return string 
     */
    public function Process()
    {
        ob_start();
        // recupere le code et la catégorie  de l'article
        $idcat = isset($_GET["idcat"]) ? ($_GET["idcat"]) : ("idcat");
        $idfile = isset($_GET["fileid"]) ? ($_GET["fileid"]) : NULL;
 
        if ($idfile != NULL)
        {
            $download = $this->download($idfile);
        }
        //$contentView = isset($_GET["id"]) ? trim((string) $_GET["id"]) : NULL;
 
        switch ($idcat)
        {
            case "1":
 
                /**
                 * Nombre d'elements a afficher par page
                 */
                define("COUNT_PER_PAGE", 10);
 
                $currmenucode = "ZM4";
                //$idcat= 1;
                $rubrique = isset($_GET["rubrique"]) ? trim($_GET["rubrique"]) : md5("ZM4A");
                $coreheaderlibe = array();
                $includefiles = array();
                $sql = "SELECT * FROM menus WHERE parent='zm4'";
                $res = $this->dbHandle->query($sql);
                if ($res)
                {
                    while ($l = $this->dbHandle->nextRecord())
                    {
                        $coreheaderlibe[md5($l["menucode"])] = trim($l["menulibe"]);
                        $includefiles[md5($l["menucode"])] = trim($l["include_file"]);
                    }
                    //mysql_free_result($res);
                }
                if (!array_key_exists($rubrique, $coreheaderlibe))
                    $rubrique = md5("ZM4A");
                $coreheaderlibe = isset($coreheaderlibe[$rubrique]) ? ($coreheaderlibe[$rubrique]) : NULL;
                $sitetitle = "$coreheaderlibe";
                $youarein = ucfirst(display_menulibe("ZM4")) . " &raquo; <i>$coreheaderlibe</i>";
 
 
                $headFiles = "<link href='themes/default/css/article.css' rel='stylesheet' type='text/css' media='screen'/>";
 
                echo "<div class='anneeMenu'>
                <div class='side-top-menu'>
                    <div class='side-bottom-menu'>
                        <div class='menu-box'>";
 
                echo "<ul class='menu-items'>";
 
                $listOfYears = $this->getListOfYears($idcat);
 
                $selectedYear = null;
                if (!isset($_GET['annee']))
                {
                    $selectedYear = ( sizeof($listOfYears) > 0 ? key($listOfYears) : null);
                }
                else /* if (is_string($_GET['annee']) && preg_match("/[0-9]{4,4}/" . $_GET['annee'])) */
                {
                    $selectedYear = $_GET['annee'];
                }
 
 
                echo "<li class='menu-item'>Ann&eacute;es</li>";
 
                foreach ($listOfYears as $oneYear)
                {
                    echo "<li class='menu-sub-item" . ( $selectedYear == $oneYear["annee"] ? " focused" : "" ) . "'>
            <a href='index.php?option=download&idcat=" . $idcat . "&annee=" . $oneYear["annee"] . "'>" . $oneYear["annee"] . "</a>&nbsp;&nbsp;&nbsp;-&nbsp;&nbsp;&nbsp;
            <span class='menu-alt'>" . $oneYear["total"] . " article(s)</span>
          </li>";
                }
 
                echo "</ul>";
                echo "</div></div></div></div>";
 
 
// Affichage des articles de l'annee active
                echo "<div class='pictures-box'>";
                echo "<div class='title'>Articles parus " . ($selectedYear != null ? " en $selectedYear" : '') . "</div>";
 
                //require 'function.php';
// on cherche le nom de la page.    
 
                $path_parts = pathinfo($_SERVER['PHP_SELF']);
                $page = $path_parts["basename"];
                $total = array_key_exists($selectedYear, $listOfYears) ? $listOfYears[$selectedYear]['total'] : 0;
 
// si la limite passée n'est pas valide on la remet à zéro
                $limite = ( isset($_GET['limite']) ? $_GET['limite'] : 0 );
//        if (!verifLimite($limite, $total, COUNT_PER_PAGE))
//        {
//            $limite = 0;
//        }
                if ($total > 0)
                {
//            //Affichage de la pagination d'entete de liste
//            if ($total > COUNT_PER_PAGE)
//            {
//                echo"<div class='pagination-box'>";
//                affichePages_article($selectedYear, COUNT_PER_PAGE, $page, $total);
//                echo"</div>";
//            }
                    //Affichage de la liste des articles
                    $listOfFiles = $this->getListOfFiles(
                            null, 
                            array(
                                "YEAR(datepubl)='" . $selectedYear . "'",
                                "idcat ='" . $this->dbHandle->escape($idcat) . "'"
                            ), 
                            array("datepubl desc"), 
                            $limite, 
                            COUNT_PER_PAGE);
 
 
 
                    //$listOfArticles = $this->getListOfFiles($idcat, $selectedYear, $limite, COUNT_PER_PAGE);
                    foreach ($listOfFiles as $l)
                    {
                        $idfile = trim($l["id"]);
                        $libearti = trim($l["libefile"]);
                        $chapeau = nl2br(trim($l["comment"]));
                        $quota = 130;
                        $chapeau = strlen($chapeau) > $quota ? substr($chapeau, 0, $quota) . "..." : $chapeau;
                        $adobefile = trim($l["linkfile"]);
                        // $idcat = trim($l["idcat"]);
                        //$docfile=trim($l["docfile"]);
                        $imgarti = "images/articledepresse/" . trim($l["image"]);
                        $dateadd = @FrenchShortDate(trim($l["dateadd"]));
                        ?>
                        <div>   
                            <a class="article-item-box" onMouseOver="montre('<b>Cliquez pour t&eacute;l&eacute;charger l&rsquo;article</b>');" href="index.php?option=download&idcat=<?php echo $idcat; ?>&fileid=<?php echo $idfile; ?>">
                                <div class="article-item-box" >
                                    <div class="article-title"><?php echo $libearti; ?></div>
                                    <div class='article-details'>
                                        Source <b> : <?php echo trim($l["source"]); ?> </b><br />
                                        Date de publication : <b><?php echo FrenchShortDate(trim($l["datepubl"])); ?></b>
                                    </div>
                                </div>
                            </a>
                        </div>
                        <?php
                    }
 
                    //Affichage de la pagination de bas de liste
//            if ($total > COUNT_PER_PAGE)
//            {
//                echo"<div class='pagination-box'>";
//                affichePages_article($selectedYear, COUNT_PER_PAGE, $page, $total);
//                echo"</div>";
//            }
                }
 
 
 
                echo "</div>";
                break;
            case "2":
 
 
                $currmenucode = "ZM6";
                $rubrique = isset($_GET["rubrique"]) ? trim($_GET["rubrique"]) : md5("ZM6D");
                $coreheaderlibe = array();
                $includefiles = array();
                $sql = "SELECT * FROM menus WHERE parent='zm6'";
                $res = $this->dbHandle->query($sql);
                if ($res)
                {
                    while ($l = $this->dbHandle->nextRecord())
                    {
                        $coreheaderlibe[md5($l["menucode"])] = trim($l["menulibe"]);
                        $includefiles[md5($l["menucode"])] = trim($l["include_file"]);
                    }
                    mysql_free_result($res);
                }
                if (!array_key_exists($rubrique, $coreheaderlibe))
                    $rubrique = md5("ZM6D");
                $coreheaderlibe = isset($coreheaderlibe[$rubrique]) ? ($coreheaderlibe[$rubrique]) : NULL;
                $sitetitle = "$coreheaderlibe";
                $youarein = ucfirst(display_menulibe("ZM6")) . " &raquo; <i>$coreheaderlibe</i>";
 
                $listOfFiles = $this->getListOfFiles(
                        null, 
                        array("idcat ='" . $this->dbHandle->escape($idcat) . "'"), 
                        array("typefile asc"));
 
                if (sizeof($listOfFiles) > 0)
                {
                    $currentFileType = null;
                    foreach ($listOfFiles as $row)
                    {
                        if ($currentFileType != trim(strtoupper($row['typefile'])))
                        {
                            if (!empty($currenFileType))
                            {
                                ?>
                                </table>
                                <?php
                            }
 
                            $currentFileType = trim(strtoupper($row['typefile']));
                            ?>
                            <table align="center" width="660px" border="0" cellspacing="2" cellpadding="2" style="margin-top: 20px">
                                <tr height="30px">
                                    <td colspan="4" style="color:#000; font-size:20px; background-image:url(themes/default/img/_insidebackright.jpg); color:#0A8636;" class="contour" align="left" valign="middle">T&eacute;l&eacute;chargement : <?php echo $currentFileType ?></td>
                                </tr>
                                <tr height="20px">
                                    <td width="500px" class="contour" align="center" valign="middle"><b>Libelle du t&eacute;l&eacute;chargement</b></td>
                                    <td width="100px" class="contour" align="center" valign="middle"><b>Taille (Ko)</b></td>
                                    <td width="60px" class="contour" align="center" valign="middle"><b>T&eacute;l&eacute;charg&eacute;</b></td>
                                </tr>
                            <?php
                        }
 
                        $idfile = trim($row["id"]);
                        $textdown = trim($row["libefile"]);
                        $downfile = trim($row["linkfile"]);
                        $countdown = (int) trim($row["countdown"]);
                        $filesize = file_exists($downfile) ? filesize($downfile) / 1024 : 0;
                        ?>
                            <tr>
                                <td width="500px" class="contour" align="left" valign="top">
                                    <div class="insideleftmenu" style="width:500px; height:10px;">
                                        <a title="<?php echo $textdown ?>" style="border-bottom:0px; color:#0066FF; padding-top:0px;" href="index.php?option=download&idcat=<?php echo $idcat; ?>&fileid=<?php echo $idfile; ?>"><?php echo $textdown ?></a>
                                    </div>
                                </td>
                                <td width="100px" class="contour" align="right" valign="middle">
                                    <b><?php echo number_format($filesize, 0, ".", " ") ?></b>
                                </td>
                                <td width="60px" class="contour" align="right" valign="middle">
                                    <i><?php echo number_format($countdown, 0, ".", " ") ?> fois</i>
                                </td>
                            </tr>
                        <?php
                    }
                    ?>
                    </table>
                    <?php
                }
                break;
        }
 
        $tplBody = ob_get_clean();
//
//
//
//        $menu = $menuId;
//
//        $youarein = "<i>" . ucfirst(display_menulibe($menuId)) . (strlen($modMenu->youAreIn) == 0 && strlen($pageTitle) > 0 ? " : " . $pageTitle : " : " . $modMenu->youAreIn ) . "</i>";
//        $sitetitle = (strlen($modMenu->siteTitle) == 0 && strlen($pageTitle) > 0 ? $pageTitle : $modMenu->siteTitle );
//        $coreheaderlibe = (strlen($modMenu->coreHeaderLib) == 0 && strlen($pageTitle) > 0 ? $pageTitle : $modMenu->coreHeaderLib );
 
        include "themes/default/tpl/innerpage.tpl";
        return ob_get_clean();
    }
 
}
?>
il y a certes des methodes dans la classe que j'utilise pour d'autres fonctionnalités mais celle sur laquelle devra porter vos conseils et avis est celle ci:

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public function download($fileId)
    {
        $res = false;
        try {
        $res = $this->getListOfFiles(null, array("id='" . $this->dbHandle->escape($fileId)."'"));
        }
        catch(DbException $ex)
        {
            //TODO : gerer l'exception
        }
 
        if (! (is_array($res) && sizeof($res)==1 && file_exists($res[0]["linkfile"])) )
        {
            header("location:./");
            exit();
        }
        $res = $res[0];
        $file = $res["linkfile"];
 
        $type = "application/octet-stream";
        switch (strrchr(basename($file), "."))
        {
            case ".gz": $type = "application/x-gzip";
                break;
            case ".tgz": $type = "application/x-gzip";
                break;
            case ".zip": $type = "application/zip";
                break;
            case ".pdf": $type = "application/pdf";
                break;
            case ".png": $type = "image/png";
                break;
            case ".gif": $type = "image/gif";
                break;
            case ".jpg": $type = "image/jpeg";
                break;
            case ".txt": $type = "text/plain";
                break;
            case ".htm": $type = "text/html";
                break;
            case ".html": $type = "text/html";
                break;
            case ".doc": $type = "application/msword";
                break;
            default: $type = "application/octet-stream";
                break;
        }
 
        //Telechargement du fichier	
        if (headers_sent() || ob_get_contents())
        {
            die('Some data has already been output, can\'t send file');
        }
 
        $header = "Content-Disposition: attachment; filename=" . basename($file);
        header("Content-Type: application/force-download");
        header("Content-Transfer-Encoding: " . $type . "\n");
        header("Content-Length: " . filesize($file));
        header("Pragma: no-cache");
        header($header); 
        header("Cache-Control: must-revalidate, post-check=0, pre-check=0, public");
        header("Expires: 0");
        readfile($file);
 
        $this->dbHandle->query("update file set countdown=countdown+1 where id='" . $this->dbHandle->escape($fileId) . "'");
    }