[PHP] Napaka prikaza pomanjšanik slik v wordpressu
3 naročniki
3 naročniki
Zdravo,
imam en problem in sicer za portal je vzeta skripta wordpress, ta uporablja še resize plugin TimThumb za generiranje thumbnailov(pomanjšanih slik) na strani...
Napaka je, da po določenem času random slik ne prikazuje več...
Po vsej verjetnosti je napaka v tem pluginu ampak mi še ni jasno kje točno...
Tudi sam sem malo raziskoval in sumim da je napaka verjetno nekje pri cachanju slik. V primeru, da izbrišem vsebino cache folderja kjer so shranjeni thumbnaili, pa se prikažejo vse slike ponovno generirane brez problema in jih določen čas prikazuje normalno...
Link slike izgleda takole:
http://website.com/wp-content/themes/lala/thumb.php?src=http://website.com/wp-content/uploads/2011/11/40428_153550107992200_153544037992807_511623_5307613_n.jpg&w=158&h=105&zc=1&q=80
Vsebina timthumb.php datoteke, ki generira sliko:
<?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",
);
*/
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);
}
$quality = floor($quality * 0.09);
imagepng($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/png");
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) . '.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", $ext)) {
return TRUE;
} else {
return FALSE;
}
}
/**
* tidy up the image source url
*/
function cleanSource($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);
return $src;
}
/**
*
*/
function get_document_root ($src) {
// check for unix servers
if(@file_exists($_SERVER['DOCUMENT_ROOT'] . '/' . $src)) {
return $_SERVER['DOCUMENT_ROOT'] . '/' . $src;
}
$blog_id = $_REQUEST['bid'];
$src = str_replace("/files/", "/wp-content/blogs.dir/$blog_id/files/", $src);
if(@file_exists($src)) {
return $src;
}
$src_arr = explode('/',$src);
for($i=0;$i<count($src_arr);$i++)
{
if($src_arr[$i]=='wp-content')
{
unset($src_arr[$i-1]);
break;
}
}
$str = implode('/',$src_arr);
if(@file_exists($_SERVER['DOCUMENT_ROOT'] . '/' . $str)) {
return $_SERVER['DOCUMENT_ROOT'] . '/' . $str;
}
$src_arr = explode('/',$src);
unset($src_arr[0]);
unset($src_arr[2]);
$str = implode('/',$src_arr);
if(@file_exists($_SERVER['DOCUMENT_ROOT'] . '/' . $str)) {
return $_SERVER['DOCUMENT_ROOT'] . '/' . $str;
}
$src_arr = explode('/',$src);
unset($src_arr[0]);
unset($src_arr[1]);
$str = implode('/',$src_arr);
if(@file_exists($_SERVER['DOCUMENT_ROOT'] . '/' . $str)) {
return $_SERVER['DOCUMENT_ROOT'] . '/' . $str;
}
// 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 . '/' . $src;
}
}
// special check for microsoft servers
if(!isset($_SERVER['DOCUMENT_ROOT'])) {
$path = str_replace("/", "\\", $_SERVER['ORIG_PATH_INFO']);
$path = str_replace($path, "", $_SERVER['SCRIPT_FILENAME']);
if( @file_exists( $path . '/' . $src ) ) {
return $path . '/' . $src;
}
}
$src_arr = explode('/',$src);
unset($src_arr[0]);
unset($src_arr[1]);
$src = implode('/',$src_arr);
$paths = array(
".",
"..",
"../..",
"../../..",
"../../../..",
"../../../../.."
);
foreach($paths as $path) {
if(@file_exists($path . '/' . $src)) {
return $path . '/' . $src;
}
}
displayError('file not found ' . $src);
}
/**
* generic error message
*/
function displayError($errorString = '') {
header('HTTP/1.1 400 Bad Request');
die($errorString);
}
?>
Tudi v php.ini fajlu kot tudi v timthumb.php za memory_limit sem povečal na 512M vendar je težava enaka ...
Stran laufa na windows sistemu.
Hvala vsem, ki mi boste znal kej pomagat!
4 odgovori
Problem bi lahko bil v uporabi funkcije "glob" znotraj "cleanCache"...
Predlagam ti, da to funkcijo odstraniš in rešiš brisanje cacha z eno eksterno scripto (uporabi opendir & readir al nekaj podobnega). Tako ali tako je neprimerno, da pri vsakem serviranju prečešeš cache, če je slučajno kakšna slika starejša od enega dneva.
Lahko preizkusiš tudi z najnovejšim timthumb-om, ki se je zadnje čase pogosto nadgrajeval, zaradi varnostnih lukenj. Link imaš v glavi skripte.