Timthumb Kalitesini %100 Yapmak

Timthumb Kalitesini %100 Yapmak

WordPress tema yaparken karşılaştığım sorunlardan birisi öne çıkan görsel kalitesinin düşük olmasıydı. İnternette yaptığım araştırma sonucu wordpress temalarınızda kullandığınız Öne çıkan görsellerin kalitesini arttırmak için bir kod buldum.

Normalde timthumb.php kullanarak oluşturduğumuz öne çıkan görsellerin görüntü çözünürlüğü farketmiş iseniz normal kalitesinden yoksun. Yaptığımız temaların kalitesi öne çıkan görsellerin yerleşimi boyutu ve çözünürlüğü ile alakalı olduğunu göze alırsak bu vereceğim kodların temanızın kalitesini arttıracağı kesin.

Buyurun bulduğum kod:

Kodu kopyalayıp temanızın timthumb.php’sine yapıştırmanız yeterli.


*/

/*
$sizeLimits = array(
"100x100",
"150x150",
);
*/

define("CACHE_SIZE", 200); // number of files to store before clearing cache
define("CACHE_CLEAR", 5); // maximum number of files to delete on each cache clear
define("VERSION", "1.08"); // version number (to force a cache refresh

$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)); $filters = get_request("f", ""); if ($new_width == 0 && $new_height == 0) { $new_width = 100; $new_height = 100; } // set path to cache directory (default is ./cache) // this can be changed to a different location $cache_dir = './cache'; // get mime type of src $mime_type = mime_type($src); // check to see if this image is in the cache already check_cache( $cache_dir, $mime_type ); // if not in cache then clear some space and generate a new file cleanCache(); ini_set('memory_limit', "30M"); // make sure that the src is gif/jpg/png if(!valid_src_mime_type($mime_type)) { displayError("Invalid src mime type: " .$mime_type); } // check to see if GD function exist if(!function_exists('imagecreatetruecolor')) { displayError("GD Library Error: imagecreatetruecolor does not exist"); } if(strlen($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); // don't allow new width or height to be greater than the original if( $new_width > $width ) {
$new_width = $width;
}
if( $new_height > $height ) {
$new_height = $height;
}

// 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 != "") {
// 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; } } } } // output image to browser based on mime type show_image($mime_type, $canvas, $cache_dir); // remove image from memory imagedestroy($canvas); } else { if(strlen($src)) { displayError("image " . $src . " not found"); } else { displayError("no source specified"); } } /** * */ function show_image($mime_type, $image_resized, $cache_dir) { global $quality; // check to see if we can write to the cache directory $is_writable = 0; $cache_file_name = $cache_dir . '/' . get_cache_file(); if(touch($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: ' . $mime_type); } imagejpeg($image_resized, $cache_file_name, $quality); if($is_writable) { show_cache_file($cache_dir, $mime_type); } imagedestroy($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, $src) { if(stristr($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); $yesterday = time() - (24 * 60 * 60); if (count($files) > 0) {

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;
}

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')) {
$mime_type = mime_content_type($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);
$mime_type = finfo_file($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|LINUX/", $os)) {
$mime_type = trim(@shell_exec('file -bi "' . $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($cache_dir, $mime_type) {

// make sure cache dir exists
if (!file_exists($cache_dir)) {
// give 777 permissions so that developer can overwrite
// files created by web server user
mkdir($cache_dir);
chmod($cache_dir, 0777);
}

show_cache_file($cache_dir, $mime_type);

}

/**
*
*/
function show_cache_file($cache_dir) {

$cache_file = $cache_dir . '/' . 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");
exit;
}

}

$fileSize = filesize($cache_file);

// send headers then display image
header("Content-Type: image/jpeg");
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);

exit;

}

}

/**
*
*/
function get_cache_file() {

global $lastModified;
static $cache_file;

if(!$cache_file) {
$cachename = $_SERVER['QUERY_STRING'] . VERSION . $lastModified;
$cache_file = md5($cachename) . '.jpg';
}

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;
}

}

/**
* tidy up the image source url
*/
function cleanSource($src) {

// remove slash from start of string
if(strpos($src, "/") == 0) {
$src = substr($src, -(strlen($src) - 1));
}

// remove http/ https/ ftp
$src = preg_replace("/^((ht|f)tp(s|):\/\/)/i", "", $src);
// remove domain name from the source url
$host = $_SERVER["HTTP_HOST"];
$src = str_replace($host, "", $src);
$host = str_replace("www.", "", $host);
$src = str_replace($host, "", $src);

// don't allow users the ability to use '../'
// in order to gain access to files below document root

// src should be specified relative to document root like:
// src=images/img.jpg or src=/images/img.jpg
// not like:
// src=../images/img.jpg
$src = preg_replace("/\.\.+\//", "", $src);

//print_r($_SERVER);

// 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'];
}

// 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');
die($errorString);

}
?>

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