I'm using the latest version of timthumb for creating thumbnails of the images on the fly.
My local server for development is on Windows Vista, Apache 2.2, php 5.2.13,
gd library is enabled with full support:
GD Support enabled
GD Version bundled (2.0.34 compatible)
FreeType Support enabled
FreeType Linkage with freetype
FreeType Version 2.1.9
T1Lib Support enabled
GIF Read Support enabled
GIF Create Support enabled
JPG Support enabled
PNG Support enabled
WBMP Support enabled
XBM Support enabled
The thumbnail images arу created successfully for PNG and GIF images. But I'm facing problems with JPG files.
It is kind of created, but the quality and colors are very bad.
Just as an example: here is image before processing: http://sheilamacd.files.wordpress.com/2007/05/kiosk-with-daft-lads.jpg and this is what I get (200х200): http://habreffect.ru/files/d85/3c865bafa/cd60e66fc274b8dcc8ebe28e0486e508.jpg
So it looks like the problem could be not in the script, but in the GD library. But I have taken gd dll from other PHP release and the situation is the same.
Any advice on this would appreciate. Thanks.
Just in case timthumb code:
<?php
/*
TimThumb script created by Tim McDaniels and Darren Hoyt with tweaks by Ben Gillbanks
http://code.google.com/p/timthumb/
MIT License: http://www.opensource.org/licenses/mit-license.php
Paramters
---------
w: width
h: height
zc: zoom crop (0 or 1)
q: quality (default is 75 and max is 100)
HTML example: <img src="/scripts/timthumb.php?src=/images/whatever.jpg&w=150&h=200&zc=1" alt="" />
*/
/*
$sizeLimits = array(
"100x100",
"150x150",
);
error_reporting(E_ALL);
ini_set("display_errors", 1);
*/
// check to see if GD function exist
if(!function_exists('imagecreatetruecolor')) {
displayError('GD Library Error: imagecreatetruecolor does not exist - please contact your webhost and ask them to install the GD library');
}
define ('CACHE_SIZE', 250); // number of files to store before clearing cache
define ('CACHE_CLEAR', 5); // maximum number of files to delete on each cache clear
define ('VERSION', '1.14'); // version number (to force a cache refresh)
define ('DIRECTORY_CACHE', './cache'); // cache directory
define ('DIRECTORY_TEMP', './temp'); // temp directory
if (function_exists('imagefilter') && defined('IMG_FILTER_NEGATE')) {
$imageFilters = array(
"1" => array(IMG_FILTER_NEGATE, 0),
"2" => array(IMG_FILTER_GRAYSCALE, 0),
"3" => array(IMG_FILTER_BRIGHTNESS, 1),
"4" => array(IMG_FILTER_CONTRAST, 1),
"5" => array(IMG_FILTER_COLORIZE, 4),
"6" => array(IMG_FILTER_EDGEDETECT, 0),
"7" => array(IMG_FILTER_EMBOSS, 0),
"8" => array(IMG_FILTER_GAUSSIAN_BLUR, 0),
"9" => array(IMG_FILTER_SELECTIVE_BLUR, 0),
"10" => array(IMG_FILTER_MEAN_REMOVAL, 0),
"11" => array(IMG_FILTER_SMOOTH, 0),
);
}
// sort out image source
$src = get_request("src", "");
if($src == '' || strlen($src) <= 3) {
displayError ('no image specified');
}
// clean params before use
$src = cleanSource($src);
// last modified time (for caching)
$lastModified = filemtime($src);
// get properties
$new_width = preg_replace("/[^0-9]+/", '', get_request('w', 0));
$new_height = preg_replace("/[^0-9]+/", '', get_request('h', 0));
$zoom_crop = preg_replace("/[^0-9]+/", '', get_request('zc', 1));
$quality = preg_replace("/[^0-9]+/", '', get_request('q', 80));
$filters = get_request('f', '');
$sharpen = get_request('s', 0);
if ($new_width == 0 && $new_height == 0) {
$new_width = 100;
$new_height = 100;
}
// get mime type of src
$mime_type = mime_type($src);
// check to see if this image is in the cache already
check_cache ($mime_type);
// if not in cache then clear some space and generate a new file
cleanCache();
ini_set('memory_limit', '50M');
// make sure that the src is gif/jpg/png
if(!valid_src_mime_type($mime_type)) {
displayError('Invalid src mime type: ' . $mime_type);
}
if(strlen($src) && file_exists($src)) {
// open the existing image
$image = open_image($mime_type, $src);
if($image === false) {
displayError('Unable to open image : ' . $src);
}
// Get original width and height
$width = imagesx($image);
$height = imagesy($image);
// generate new w/h if not provided
if( $new_width && !$new_height ) {
$new_height = $height * ( $new_width / $width );
} elseif($new_height && !$new_width) {
$new_width = $width * ( $new_height / $height );
} elseif(!$new_width && !$new_height) {
$new_width = $width;
$new_height = $height;
}
// create a new true color image
$canvas = imagecreatetruecolor( $new_width, $new_height );
imagealphablending($canvas, false);
// Create a new transparent color for image
$color = imagecolorallocatealpha($canvas, 0, 0, 0, 127);
// Completely fill the background of the new image with allocated color.
imagefill($canvas, 0, 0, $color);
// Restore transparency blending
imagesavealpha($canvas, true);
if( $zoom_crop ) {
$src_x = $src_y = 0;
$src_w = $width;
$src_h = $height;
$cmp_x = $width / $new_width;
$cmp_y = $height / $new_height;
// calculate x or y coordinate and width or height of source
if ( $cmp_x > $cmp_y ) {
$src_w = round( ( $width / $cmp_x * $cmp_y ) );
$src_x = round( ( $width - ( $width / $cmp_x * $cmp_y ) ) / 2 );
} elseif ( $cmp_y > $cmp_x ) {
$src_h = round( ( $height / $cmp_y * $cmp_x ) );
$src_y = round( ( $height - ( $height / $cmp_y * $cmp_x ) ) / 2 );
}
imagecopyresampled( $canvas, $image, 0, 0, $src_x, $src_y, $new_width, $new_height, $src_w, $src_h );
} else {
// copy and resize part of an image with resampling
imagecopyresampled( $canvas, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height );
}
if ($filters != '' && function_exists('imagefilter') && defined('IMG_FILTER_NEGATE')) {
// apply filters to image
$filterList = explode("|", $filters);
foreach($filterList as $fl) {
$filterSettings = explode(",", $fl);
if(isset($imageFilters[$filterSettings[0]])) {
for($i = 0; $i < 4; $i ++) {
if(!isset($filterSettings[$i])) {
$filterSettings[$i] = null;
}
}
switch($imageFilters[$filterSettings[0]][1]) {
case 1:
imagefilter($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1]);
break;
case 2:
imagefilter($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1], $filterSettings[2]);
break;
case 3:
imagefilter($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1], $filterSettings[2], $filterSettings[3]);
break;
default:
imagefilter($canvas, $imageFilters[$filterSettings[0]][0]);
break;
}
}
}
}
if ($sharpen > 0 && function_exists('imageconvolution')) {
$sharpenMatrix = array(
array(-1,-1,-1),
array(-1,16,-1),
array(-1,-1,-1),
);
$divisor = 8;
$offset = 0;
imageconvolution($canvas, $sharpenMatrix, $divisor, $offset);
}
// output image to browser based on mime type
show_image($mime_type, $canvas);
// remove image from memory
imagedestroy($canvas);
} else {
if (strlen($src)) {
displayError ('image ' . $src . ' not found');
} else {
displayError ('no source specified');
}
}
/**
*
*/
function show_image($mime_type, $image_resized) {
global $quality;
// check to see if we can write to the cache directory
$is_writable = 0;
$cache_file_name = DIRECTORY_CACHE . '/' . get_cache_file();
if (touch($cache_file_name)) {
// give 666 permissions so that the developer
// can overwrite web server user
chmod ($cache_file_name, 0666);
$is_writable = 1;
} else {
$cache_file_name = NULL;
header ('Content-type: ' . $mime_type);
}
switch ($mime_type) {
case 'image/jpeg':
imagejpeg($image_resized, $cache_file_name, $quality);
break;
default :
$quality = floor ($quality * 0.09);
imagepng($image_resized, $cache_file_name, $quality);
}
if ($is_writable) {
show_cache_file ($mime_type);
}
imagedestroy ($image_resized);
displayError ('error showing image');
}
/**
*
*/
function get_request( $property, $default = 0 ) {
if( isset($_REQUEST[$property]) ) {
return $_REQUEST[$property];
} else {
return $default;
}
}
/**
*
*/
function open_image($mime_type, $src) {
$mime_type = strtolower($mime_type);
if (stristr ($mime_type, 'gif')) {
$image = imagecreatefromgif($src);
} elseif (stristr($mime_type, 'jpeg')) {
@ini_set ('gd.jpeg_ignore_warning', 1);
$image = imagecreatefromjpeg($src);
} elseif (stristr ($mime_type, 'png')) {
$image = imagecreatefrompng($src);
}
return $image;
}
/**
* clean out old files from the cache
* you can change the number of files to store and to delete per loop in the defines at the top of the code
*/
function cleanCache() {
$files = glob("cache/*", GLOB_BRACE);
if (count($files) > 0) {
$yesterday = time() - (24 * 60 * 60);
usort($files, 'filemtime_compare');
$i = 0;
if (count($files) > CACHE_SIZE) {
foreach ($files as $file) {
$i ++;
if ($i >= CACHE_CLEAR) {
return;
}
if (@filemtime($file) > $yesterday) {
return;
}
if (file_exists($file)) {
unlink($file);
}
}
}
}
}
/**
* compare the file time of two files
*/
function filemtime_compare($a, $b) {
return filemtime($a) - filemtime($b);
}
/**
* determine the file mime type
*/
function mime_type($file) {
if (stristr(PHP_OS, 'WIN')) {
$os = 'WIN';
} else {
$os = PHP_OS;
}
$mime_type = '';
if (function_exists('mime_content_type') && $os != 'WIN') {
$mime_type = mime_content_type($file);
}
// use PECL fileinfo to determine mime type
if (!valid_src_mime_type($mime_type)) {
if (function_exists('finfo_open')) {
$finfo = @finfo_open(FILEINFO_MIME);
if ($finfo != '') {
$mime_type = finfo_file($finfo, $file);
finfo_close($finfo);
}
}
}
// try to determine mime type by using unix file command
// this should not be executed on windows
if (!valid_src_mime_type($mime_type) && $os != "WIN") {
if (preg_match("/FreeBSD|FREEBSD|LINUX/", $os)) {
$mime_type = trim(@shell_exec('file -bi ' . escapeshellarg($file)));
}
}
// use file's extension to determine mime type
if (!valid_src_mime_type($mime_type)) {
// set defaults
$mime_type = 'image/png';
// file details
$fileDetails = pathinfo($file);
$ext = strtolower($fileDetails["extension"]);
// mime types
$types = array(
'jpg' => 'image/jpeg',
'jpeg' => 'image/jpeg',
'png' => 'image/png',
'gif' => 'image/gif'
);
if (strlen($ext) && strlen($types[$ext])) {
$mime_type = $types[$ext];
}
}
return $mime_type;
}
/**
*
*/
function valid_src_mime_type($mime_type) {
if (preg_match("/jpg|jpeg|gif|png/i", $mime_type)) {
return true;
}
return false;
}
/**
*
*/
function check_cache ($mime_type) {
// make sure cache dir exists
if (!file_exists(DIRECTORY_CACHE)) {
// give 777 permissions so that developer can overwrite
// files created by web server user
mkdir(DIRECTORY_CACHE);
chmod(DIRECTORY_CACHE, 0777);
}
show_cache_file ($mime_type);
}
/**
*
*/
function show_cache_file ($mime_type) {
$cache_file = DIRECTORY_CACHE . '/' . get_cache_file();
if (file_exists($cache_file)) {
$gmdate_mod = gmdate("D, d M Y H:i:s", filemtime($cache_file));
if(! strstr($gmdate_mod, "GMT")) {
$gmdate_mod .= " GMT";
}
if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
// check for updates
$if_modified_since = preg_replace ("/;.*$/", "", $_SERVER["HTTP_IF_MODIFIED_SINCE"]);
if ($if_modified_since == $gmdate_mod) {
header("HTTP/1.1 304 Not Modified");
die();
}
}
clearstatcache();
$fileSize = filesize ($cache_file);
// send headers then display image
header ('Content-Type: ' . $mime_type);
header ('Accept-Ranges: bytes');
header ('Last-Modified: ' . $gmdate_mod);
header ('Content-Length: ' . $fileSize);
header ('Cache-Control: max-age=9999, must-revalidate');
header ('Expires: ' . $gmdate_mod);
readfile ($cache_file);
die();
}
}
/**
*
*/
function get_cache_file() {
global $lastModified;
static $cache_file;
if (!$cache_file) {
$cachename = $_SERVER['QUERY_STRING'] . VERSION . $lastModified;
$cache_file = md5($cachename) . '.png';
}
return $cache_file;
}
/**
* check to if the url is valid or not
*/
function valid_extension ($ext) {
if (preg_match("/jpg|jpeg|png|gif/i", $ext)) {
return TRUE;
} else {
return FALSE;
}
}
/**
*
*/
function checkExternal ($src) {
$allowedSites = array(
'flickr.com',
'picasa.com',
'blogger.com',
'wordpress.com',
'img.youtube.com',
);
if (preg_match('/http:\/\//', $src) == true) {
$url_info = parse_url ($src);
$isAllowedSite = false;
foreach ($allowedSites as $site) {
$site = '/' . addslashes($site) . '/';
if (preg_match($site, $url_info['host']) == true) {
$isAllowedSite = true;
}
}
if ($isAllowedSite) {
$fileDetails = pathinfo($src);
$ext = strtolower($fileDetails['extension']);
$filename = md5($src);
$local_filepath = DIRECTORY_TEMP . '/' . $filename . '.' . $ext;
if (!file_exists($local_filepath)) {
if (function_exists('curl_init')) {
$fh = fopen($local_filepath, 'w');
$ch = curl_init($src);
curl_setopt($ch, CURLOPT_URL, $src);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0');
curl_setopt($ch, CURLOPT_FILE, $fh);
if (curl_exec($ch) === FALSE) {
if (file_exists($local_filepath)) {
unlink($local_filepath);
}
displayError('error reading file ' . $src . ' from remote host: ' . curl_error($ch));
}
curl_close($ch);
fclose($fh);
} else {
if (!$img = file_get_contents($src)) {
displayError('remote file for ' . $src . ' can not be accessed. It is likely that the file permissions are restricted');
}
if (file_put_contents($local_filepath, $img) == FALSE) {
displayError('error writing temporary file');
}
}
if (!file_exists($local_filepath)) {
displayError('local file for ' . $src . ' can not be created');
}
}
$src = $local_filepath;
} else {
displayError('remote host "' . $url_info['host'] . '" not allowed');
}
}
return $src;
}
/**
* tidy up the image source url
*/
function cleanSource($src) {
$host = str_replace('www.', '', $_SERVER['HTTP_HOST']);
$regex = "/^((ht|f)tp(s|):\/\/)(www\.|)" . $host . "/i";
$src = preg_replace ($regex, '', $src);
$src = strip_tags ($src);
$src = checkExternal ($src);
// remove slash from start of string
if (strpos($src, '/') === 0) {
$src = substr ($src, -(strlen($src) - 1));
}
// don't allow users the ability to use '../'
// in order to gain access to files below document root
$src = preg_replace("/\.\.+\//", "", $src);
// get path to image on file system
$src = get_document_root($src) . '/' . $src;
return $src;
}
/**
*
*/
function get_document_root ($src) {
// check for unix servers
if(file_exists($_SERVER['DOCUMENT_ROOT'] . '/' . $src)) {
return $_SERVER['DOCUMENT_ROOT'];
}
// check from script filename (to get all directories to timthumb location)
$parts = array_diff(explode('/', $_SERVER['SCRIPT_FILENAME']), explode('/', $_SERVER['DOCUMENT_ROOT']));
$path = $_SERVER['DOCUMENT_ROOT'];
foreach ($parts as $part) {
$path .= '/' . $part;
if (file_exists($path . '/' . $src)) {
return $path;
}
}
// the relative paths below are useful if timthumb is moved outside of document root
// specifically if installed in wordpress themes like mimbo pro:
// /wp-content/themes/mimbopro/scripts/timthumb.php
$paths = array(
".",
"..",
"../..",
"../../..",
"../../../..",
"../../../../.."
);
foreach ($paths as $path) {
if(file_exists($path . '/' . $src)) {
return $path;
}
}
// special check for microsoft servers
if (!isset($_SERVER['DOCUMENT_ROOT'])) {
$path = str_replace("/", "\\", $_SERVER['ORIG_PATH_INFO']);
$path = str_replace($path, "", $_SERVER['SCRIPT_FILENAME']);
if (file_exists($path . '/' . $src)) {
return $path;
}
}
displayError('file not found ' . $src);
}
/**
* generic error message
*/
function displayError ($errorString = '') {
header('HTTP/1.1 400 Bad Request');
echo '<pre>' . $errorString . '<br />TimThumb version : ' . VERSION . '</pre>';
die();
}
?>