php - Error in creating thumbnails from my form -
i've got problem script of mine create thumbnails images/photos users can upload form in personal website.
first of all, after possible controls prevent possible attacks, rename photo uploaded user using php functions, , i'd show logged user (and logging function use here sessions) uploaded images/photos thumbnails, giving him possibility click on them , obtain way photos original dimensions.
the problem got the thumbnails, i'm not able create!!!.
i created new table in mysql database way:
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) ); then created file in php called vision.php show user images, , file parses file in query string way:
echo '<img src="thumb.php?id_file=' . $row['id_file'] . '" alt="' . $row['id_file'] . '" /> <br /><br /><br />'; the directory contains photos called “uploaded” set permissions in 777. gave in fact in shell (i'm using gnu/linux distro) on local server apache this:
sudo chmod 777 uploaded
and see there photos myself uploded on localhost, test websites create.
anyway online got same problem.
here source of file called vision.php:
<?php try { // report php errors error_reporting(-1); $pdo->setattribute(pdo::attr_errmode, pdo::errmode_exception); $stmt = $pdo->prepare("select * uploaded id_user = ? order id_file"); $stmt->execute(array($_session['id_user'])); if ( $row = $stmt->fetch(pdo::fetch_assoc) ) { // here use do/while looop { echo '<br /><br />your images:' . ' <a href="upload.php">go back</a><br /><br />'; echo '<img src="thumb.php?id_file=' . $row['id_file'] . '" alt="' . $row['id_file'] . '" /> <br /><br /><br />'; } while ( $row = $stmt->fetch(pdo::fetch_assoc) ); } else { echo '<br /><br /> <div class="centra">hi, ' . $_session['username'] . ', sent me no images now. <br /><br /> <a href="upload.php">send me image/photo, if wish</a></div>'; include 'footer.php'; exit; } } // end try {} catch (pdoexception $e) { echo "error!: " . $e->getmessage() . "<br />"; die; } ?> and script called thumb.php:
<?php // wanna have jpeg image thumbnail header('content-type: image/jpeg'); // go on session session_start(); require_once 'config_db.php'; try { //chmod("./uploaded/", 0777); // report php errors error_reporting(-1); $pdo->setattribute(pdo::attr_errmode, pdo::errmode_exception); $stmt = $pdo->prepare("select * uploaded id_file = ? order id_file"); // parameter contained in querystring in vision.php $stmt->execute(array($_get['id_file'])); $row = stmt->fetch(pdo::fetch_assoc); switch ($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 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); // 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 thumbnail free memory server imagedestroy($thumb); } // end try {} catch (pdoexception $e) { echo "error!: " . $e->getmessage() . "<br />"; die; } ?> i'd add here errors can see error_file contained in directory /opt/lampp/logs:
i investigated error_file contained in directory /opt/lampp/logs , here found this:
[wed jun 26 19:37:34.279824 2013] [:error] [pid 2933] [client 127.0.0.1:43215] php warning: **imagecreatefromjpeg(uploaded/046ccd6f930959786f71447f2ecf228d814481eb40481889d9ea619191a153cb12f585bbae867a66.jpeg): failed open stream: no such file or directory in /opt/lampp/htdocs/new_site_local/thumb.php on line 35, referer:[http://localhost/new_site_local/vision.php]** [wed jun 26 19:37:34.279915 2013] [:error] [pid 2933] [client 127.0.0.1:43215] php warning: imagesx() expects parameter 1 resource, boolean given in /opt/lampp/htdocs/new_site_local/thumb.php on line 47, referer:[ http://localhost/new_site_local/vision.php] [wed jun 26 19:37:34.279938 2013] [:error] [pid 2933] [client 127.0.0.1:43215] php warning: imagesy() expects parameter 1 resource, boolean given in /opt/lampp/htdocs/new_site_local/thumb.php on line 48, referer: [http://localhost/new_site_local/vision.php] [wed jun 26 19:37:34.279961 2013] [:error] [pid 2933] [client 127.0.0.1:43215] php warning: division 0 in /opt/lampp/htdocs/new_site_local/thumb.php on line 59, referer:[http://localhost/new_site_local/vision.php] etc.
thanks all!
the first error the important
"failed open stream: no such file or directory" means code couldn't find file. possibly because file's relative path not expanded expected to.
try using var_dump(realpath($filename)) this:
case 'jpg' || 'jpeg': $filename = 'uploaded/' . $row['nome_file'] . '.' . $row['tipo_file']; var_dump( file_exists($filename), realpath($filename), is_readable($filename) ); $image = imagecreatefromjpeg($filename); break; you'll notice file_exists, realpath, is_readable yield boolean(false).
for testing , error reporting , displaying
try separating actual thumbnail generation code database read code. hard code file name , see if thumbnail generation works file name.
also try using error_reporting(e_all); , ini_set('display_errors', true); able read errors php might sending.
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