/Quản lý website tin tức thời trang và cuộc sống PHP/code_goclamdep/wp-content/themes/VN-News/scripts/timthumb.php
PHP | 331 lines | 189 code | 83 blank | 59 comment | 43 complexity | d6e6bae37684a48b6ca0f35d19d6c15d MD5 | raw file
- <?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
- /* Parameters allowed: */
- // 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="" />
-
- if( !isset( $_REQUEST[ "src" ] ) ) { die( "no image specified" ); }
- // clean params before use
- $src = clean_source( $_REQUEST[ "src" ] );
- // set document root
- $doc_root = get_document_root($src);
-
- // get path to image on file system
- $src = $doc_root . '/' . $src;
- $new_width = preg_replace( "/[^0-9]+/", "", $_REQUEST[ 'w' ] );
- $new_height = preg_replace( "/[^0-9]+/", "", $_REQUEST[ 'h' ] );
- $zoom_crop = preg_replace( "/[^0-9]+/", "", $_REQUEST[ 'zc' ] );
- if( !isset( $_REQUEST['q'] ) ) { $quality = 80; } else { $quality = preg_replace("/[^0-9]/", "", $_REQUEST['q'] ); }
- // 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 );
- // make sure that the src is gif/jpg/png
- if( !valid_src_mime_type( $mime_type ) ) {
- $error = "Invalid src mime type: $mime_type";
- die( $error );
- }
- // check to see if GD function exist
- if(!function_exists('imagecreatetruecolor')) {
- $error = "GD Library Error: imagecreatetruecolor does not exist";
- die( $error );
- }
- if(strlen($src) && file_exists( $src ) ) {
- // open the existing image
- $image = open_image( $mime_type, $src );
- if( $image === false ) { die( '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 );
- 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 );
- }
- // output image to browser based on mime type
- show_image( $mime_type, $canvas, $quality, $cache_dir );
-
- // remove image from memory
- imagedestroy( $canvas );
-
- } else {
- if( strlen( $src ) ) { echo $src . ' not found.'; } else { echo 'no source specified.'; }
-
- }
- function show_image ( $mime_type, $image_resized, $quality, $cache_dir ) {
- // 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 );
- }
-
- if( stristr( $mime_type, 'gif' ) ) {
- imagegif( $image_resized, $cache_file_name );
- }
- elseif( stristr( $mime_type, 'jpeg' ) ) {
- imagejpeg( $image_resized, $cache_file_name, $quality );
- }
- elseif( stristr( $mime_type, 'png' ) ) {
- imagepng( $image_resized, $cache_file_name, ceil( $quality / 10 ) );
- }
- if( $is_writable ) { show_cache_file( $cache_dir, $mime_type ); }
- exit;
- }
- 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;
- }
- function mime_type ( $file ) {
- //$os = strtolower(php_uname());
- $mime_type = '';
- // use PECL fileinfo to determine 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 ) && !(eregi('windows', php_uname()))) {
- 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 ) ) {
- $frags = split( "\.", $file );
- $ext = strtolower( $frags[ count( $frags ) - 1 ] );
- $types = array(
- 'jpg' => 'image/jpeg',
- 'jpeg' => 'image/jpeg',
- 'png' => 'image/png',
- 'gif' => 'image/gif'
- );
- if( strlen( $ext ) && strlen( $types[$ext] ) ) {
- $mime_type = $types[ $ext ];
- }
- // if no extension provided, default to jpg
- if( !strlen( $ext ) && !valid_src_mime_type( $mime_type ) ) {
- $mime_type = 'image/jpeg';
- }
- }
- return $mime_type;
- }
- function valid_src_mime_type ( $mime_type ) {
- if( preg_match( "/jpg|jpeg|gif|png/i", $mime_type ) ) { return 1; }
- return 0;
- }
- 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, $mime_type ) {
- $cache_file = get_cache_file();
- if( file_exists( $cache_dir . '/' . $cache_file ) ) {
-
- // check for updates
- $if_modified_since = preg_replace( '/;.*$/', '', $_SERVER[ "HTTP_IF_MODIFIED_SINCE" ] );
- $gmdate_mod = gmdate( 'D, d M Y H:i:s', filemtime( $cache_dir . '/' . $cache_file ) );
- if( strstr( $gmdate_mod, 'GMT' ) ) {
- $gmdate_mod .= " GMT";
- }
- if ( $if_modified_since == $gmdate_mod ) {
- header( "HTTP/1.1 304 Not Modified" );
- exit;
- }
-
- // send headers then display image
- header( "Content-Type: " . $mime_type );
- header( "Last-Modified: " . gmdate( 'D, d M Y H:i:s', filemtime( $cache_dir . '/' . $cache_file ) . " GMT" ) );
- header( "Content-Length: " . filesize( $cache_dir . '/' . $cache_file ) );
- header( "Cache-Control: max-age=9999, must-revalidate" );
- header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + 9999 ) . "GMT" );
- readfile( $cache_dir . '/' . $cache_file );
- exit;
- }
-
- }
- function get_cache_file () {
- static $cache_file;
- if(!$cache_file) {
- $frags = split( "\.", $_REQUEST['src'] );
- $ext = strtolower( $frags[ count( $frags ) - 1 ] );
- if(!valid_extension($ext)) { $ext = 'jpg'; }
- $cachename = $_REQUEST['src'] . $_REQUEST['w'] . $_REQUEST['h'] . $_REQUEST['zc'] . $_REQUEST['q'];
- $cache_file = md5( $cachename ) . '.' . $ext;
- }
- return $cache_file;
- }
- function valid_extension ($ext) {
- if( preg_match( "/jpg|jpeg|png|gif/i", $ext ) ) return 1;
- return 0;
- }
- function clean_source ( $src ) {
- // don't allow off site src to be specified via http/https/ftp
- if( preg_match( "/^((ht|f)tp(s|):\/\/)/i", $src ) ) {
- die( "Improper src specified:" . $src );
- }
- //$src = preg_replace( "/(?:^\/+|\.{2,}\/+?)/", "", $src );
- //$src = preg_replace( '/^\w+:\/\/[^\/]+/', '', $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 );
- return $src;
- }
- function get_document_root ($src) {
- 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;
- }
- }
- }
- ?>