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POError in creating thumbnails from my form
 

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  1. POError in creating thumbnails from my form
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    <p>I've got a problem with a script of mine to create some thumbnails from images/photos that users can upload from my form in my personal website.</p> <p>First of all, after all the possible controls to prevent any possible attacks, I rename the photo uploaded from a user using some PHP functions, and then I'd like to show my logged user (and for the logging function I use here the sessions) his previously uploaded images/photos as thumbnails, giving then him the possibility to click on them and to obtain this way the photos with their original dimensions.</p> <p>The problem I got is with <strong><em>the thumbnails</em></strong>, that I'm not able to create!!!.</p> <p>I created a new table in my MySql database this way:</p> <pre><code>CREATE TABLE uploaded (id_file INT(11) UNSIGNED NOT NULL AUTO_INCREMENT url_file VARCHAR(50) NOT NULL, name_file VARCHAR(100) NOT NULL, type_file VARCHAR(20) NOT NULL, description VARCHAR(255), notes TEXT, data_insert DATETIME NOT NULL, address_IP CHAR(15) NOT NULL, username VARCHAR(20) NOT NULL, id_user INT(11) NOT NULL, PRIMARY KEY(id_file) ); </code></pre> <p>Then I created a file in PHP called <strong>vision.php</strong> to show the user his images, and this file parses itself another file in the query string this way:</p> <pre><code>echo '&lt;img src="thumb.php?id_file=' . $row['id_file'] . '" alt="' . $row['id_file'] . '" /&gt; &lt;br /&gt;&lt;br /&gt;&lt;br /&gt;'; </code></pre> <p>The directory that contains the photos called <strong>“uploaded”</strong> is set with the permissions in 777. I gave in fact in a shell (I'm using a GNU/Linux distro) on my local server Apache this:</p> <p>sudo chmod 777 uploaded</p> <p>and I see there the photos I myself uploded on my localhost, where I always test the websites I create.</p> <p>Anyway online I got the same problem.</p> <p>Here is the source of the file I called <strong>vision.php</strong>:</p> <pre><code> &lt;?php try { // Report all PHP errors error_reporting(-1); $pdo-&gt;setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $stmt = $pdo-&gt;prepare("SELECT * FROM uploaded WHERE id_user = ? ORDER BY id_file"); $stmt-&gt;execute(array($_SESSION['id_user'])); if ( $row = $stmt-&gt;fetch(PDO::FETCH_ASSOC) ) { // Here I use a do/while looop do { echo '&lt;br /&gt;&lt;br /&gt;Your images:' . '&amp;nbsp; &amp;nbsp; &lt;a href="upload.php"&gt;Go back&lt;/a&gt;&lt;br /&gt;&lt;br /&gt;'; echo '&lt;img src="thumb.php?id_file=' . $row['id_file'] . '" alt="' . $row['id_file'] . '" /&gt; &lt;br /&gt;&lt;br /&gt;&lt;br /&gt;'; } while ( $row = $stmt-&gt;fetch(PDO::FETCH_ASSOC) ); } else { echo '&lt;br /&gt;&lt;br /&gt; &lt;div class="centra"&gt;Hi, ' . $_SESSION['username'] . ', you sent me no images up to now. &lt;br /&gt;&lt;br /&gt; &lt;a href="upload.php"&gt;Send me an image/photo, if you wish&lt;/a&gt;&lt;/div&gt;'; include 'footer.php'; exit; } } // end try {} catch (PDOException $e) { echo "Error!: " . $e-&gt;getMessage() . "&lt;br /&gt;"; die; } ?&gt; </code></pre> <p>and this is the script I called <strong>thumb.php</strong>:</p> <pre><code>&lt;?php // I wanna have a jpeg image as thumbnail header('Content-type: image/jpeg'); // go on with the session session_start(); require_once 'config_db.php'; try { //chmod("./uploaded/", 0777); // Report all PHP errors error_reporting(-1); $pdo-&gt;setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $stmt = $pdo-&gt;prepare("SELECT * FROM uploaded WHERE id_file = ? ORDER BY id_file"); // the parameter contained in the querystring in vision.php $stmt-&gt;execute(array($_GET['id_file'])); $row = stmt-&gt;fetch(PDO::FETCH_ASSOC); switch ($row['tipo_file']) { case 'png': $image = imagecreatefrompng('uploaded/' . $row['nome_file'] . '.' . $row['tipo_file']); break; case 'jpg' || 'jpeg': $image = imagecreatefromjpeg('uploaded/' . $row['nome_file'] . '.' . $row['tipo_file']); break; case 'gif': $image = imagecreatefromgif('uploaded/' . $row['nome_file'] . '.' . $row['tipo_file']); break; default: die('Impossible to get the image extension'); } $width = imagesx($image); $height = imagesy($image); $thumbsize = 250; $perc = min($thumbsize / $width, $thumbsize / $height); $thumb_width = intval($perc * $width); $thumb_height = intval($perc * $height); // The thumbnail $thumb = imagecreatetruecolor($thumb_width, $thumb_height); imagecopyresampled($thumb, $image, 0, 0, 0, 0, $thumb_width, $thumb_height, $width, $height); imagejpeg($thumb, NULL, 80); // destroy the thumbnail to free some memory from the server imagedestroy($thumb); } // end try {} catch (PDOException $e) { echo "Error!: " . $e-&gt;getMessage() . "&lt;br /&gt;"; die; } ?&gt; </code></pre> <p>I'd like to add here some errors I can see from the error_file contained in the directory /opt/lampp/logs:</p> <p>I investigated this error_file contained in the directory /opt/lampp/logs and here I found this:</p> <pre><code>[Wed Jun 26 19:37:34.279824 2013] [:error] [pid 2933] [client 127.0.0.1:43215] PHP Warning:  **imagecreatefromjpeg(uploaded/046ccd6f930959786f71447f2ecf228d814481eb40481889d9ea619191a153cb12f585bbae867a66.jpeg): failed to open stream: No such file or directory in /opt/lampp/htdocs/new_site_local/thumb.php on line 35, referer:[http://localhost/new_site_local/vision.php]** [Wed Jun 26 19:37:34.279915 2013] [:error] [pid 2933] [client 127.0.0.1:43215] PHP Warning:  imagesx() expects parameter 1 to be resource, boolean given in /opt/lampp/htdocs/new_site_local/thumb.php on line 47, referer:[ http://localhost/new_site_local/vision.php] [Wed Jun 26 19:37:34.279938 2013] [:error] [pid 2933] [client 127.0.0.1:43215] PHP Warning:  imagesy() expects parameter 1 to be resource, boolean given in /opt/lampp/htdocs/new_site_local/thumb.php on line 48, referer: [http://localhost/new_site_local/vision.php] [Wed Jun 26 19:37:34.279961 2013] [:error] [pid 2933] [client 127.0.0.1:43215] PHP Warning:  Division by zero in /opt/lampp/htdocs/new_site_local/thumb.php on line 59, referer:[http://localhost/new_site_local/vision.php] </code></pre> <p>etc.</p> <p>Thanks all!</p>
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    1. USMihai Stancu
    1. USMatt
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      1. POError in creating thumbnails from my form
      1. USEzekiel Victor
 

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