Script seperti ini adalah salah satu script pave gw. Betapa tidak, sepertinya script ginian akan gw butuhkan setiap kali ada web project baru.
Gw ada beberapa stock image resize coding mulai dari bikinan sendiri sampai dengan beberapa coding opensource yang gw dapet dengan susah payah di internet.
Kali ini resize image on the fly yang di beri title TimThumb dan di release oleh Mimbo Pro. Dan yang pasti coding ini di open ke public bro…. keren kan?
Ada beberapa hal mengapa gw milih script ini diantaranya;
- Support gif dan png
- Dari sisi kecepatan/speed
- Support cropping
- Dan yang pasti caching
Cara menggunakan
Mudah saja, tinggal copy source codes-nya pada sebuah document dan beri nama ‘timthumb.php‘, kemudian taruh di folder apa saja di site kita (contoh: /scripts) dan kemudian panggil image seperti ini:
<img src=”/scripts/timthumb.php?src=/images/whatever.jpg&h=150&w=150&zc=1″ alt=”" />
Configurasi:
- Script ini butuh GD library (tau GD kan? sejenis jamu kuat dengan ramuan ginseng dan pasak bumi)
- Ketika di install dan digunakan, script ini akan secara otomatis membuat folder /cache/.
- Jika host server tidak mengijinkan script ini mengcreate folder, sebaiknya loe bikin folder /cache/ secara manual dan beri permission 777.
TimThumb parameter:
- w: width
- h: height
- zc: zoom crop (0 atau 1)
- q: quality (default 75 dan max 100)
Berikut adalah souce codes-nya:
<?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 = preg_replace( “/^(\.+(\/|))+/”, “”, $_REQUEST['src'] );
$src = preg_replace( ‘/^(s?f|ht)tps?:\/\/[^\/]+/i’, ”, $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 );
}// set document root
$doc_root = $_SERVER['DOCUMENT_ROOT'];// get path to image on file system
$src = $doc_root . ‘/’ . $src;if(strlen($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);// 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’)) {
$image = imagecreatefromjpeg($src);
}
elseif(stristr($mime_type, ‘png’)) {
$image = imagecreatefrompng($src);
}
return $image;}
function mime_type ($file) {
$frags = split(“\.”, $file);
$ext = strtolower( $frags[ count( $frags ) - 1 ] );
$types = array(
‘jpg’ => ‘image/jpeg’,
‘jpeg’ => ‘image/jpeg’,
‘png’ => ‘image/png’,
‘gif’ => ‘image/gif’,
‘bmp’ => ‘image/bmp’,
‘doc’ => ‘application/msword’,
‘xls’ => ‘application/msword’,
‘xml’ => ‘text/xml’,
‘html’ => ‘text/html’
);
$mime_type = $types[$ext];
if(!strlen($mime_type)) { $mime_type = ‘unknown’; }
return($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”;
}//error_log(“TimThumb: $gmdate_mod == $if_modified_since”);
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 () {
$request_params = $_REQUEST;
$cachename = $_REQUEST['src'] . $_REQUEST['w'] . $_REQUEST['h'] . $_REQUEST['zc'] . $_REQUEST['q'];
$cache_file = md5( $cachename );
return $cache_file;}
?>
