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How to make TimThumb not resize images?

  • I’m using timthumb in one of my blogs, but if the image isn’t 150×150, timthumb will automatically crop and resize images, which means they end up extremely ugly sometimes.

    Is there any way I can edit the code so that it only crops, but does not resize? Here’s the code I’m currently using:

    <?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', 30);		// number of files to store before clearing cache
    
    define ('CACHE_CLEAR', 5);		// maximum number of files to delete on each cache clear
    
    define ('VERSION', '1.09');		// 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);
    
    	// 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');
    
    	die($errorString);
    
    }
    
    ?>

  • The topic ‘How to make TimThumb not resize images?’ is closed to new replies.
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