• Hey guys over at my blog tehbigwebtheory.com I installed a theme that I enjoy a lot! Only problem is is that it seems to zoom into my featured image a lot. I have tried using 576×172 resolution with no luck. Does anyone have any ideas of what I could to because it looks really ugly the way it is right now.

Viewing 7 replies - 1 through 7 (of 7 total)
  • Thread Starter CGrobbelaar

    (@cgrobbelaar)

    seriously nobody?

    What your theme is doing is resizing the image based with some php in timthumb.php, if you were to take a look in there in your theme file and change some variables (it might be nice and commented). Then if you don’t understand it you could maybe copy it to here and I’ll take a look.

    Thread Starter CGrobbelaar

    (@cgrobbelaar)

    <?php
    /*
    TimThumb script created by Tim McDaniels and Darren Hoyt with tweaks by Ben Gillbanks
    https://code.google.com/p/timthumb/

    MIT License: https://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(
    “100×100”,
    “150×150”,
    );

    error_reporting(E_ALL);
    ini_set(“display_errors”, 1);
    */

    // check to see if GD function exist
    if(!function_exists(‘imagecreatetruecolor’)) {
    displayError(‘GD Library Error: imagecreatetruecolor does not exist – please contact your webhost and ask them to install the GD library’);
    }

    define (‘CACHE_SIZE’, 250); // number of files to store before clearing cache
    define (‘CACHE_CLEAR’, 5); // maximum number of files to delete on each cache clear
    define (‘VERSION’, ‘1.11’); // version number (to force a cache refresh

    if (function_exists(‘imagefilter’) && defined(‘IMG_FILTER_NEGATE’)) {
    $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’, “50M”);

    // make sure that the src is gif/jpg/png
    if(!valid_src_mime_type($mime_type)) {
    displayError(“Invalid src mime type: ” .$mime_type);
    }

    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);

    // 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 != ” && function_exists(‘imagefilter’) && defined(‘IMG_FILTER_NEGATE’)) {
    // 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);

    }

    switch ($mime_type) {

    case ‘image/jpeg’:
    imagejpeg($image_resized, $cache_file_name, $quality);
    break;

    default :
    $quality = floor ($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) {

    $mime_type = strtolower($mime_type);

    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);

    if (count($files) > 0) {

    $yesterday = time() – (24 * 60 * 60);

    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;
    }

    if (file_exists($file)) {
    unlink($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’)) {
    $finfo = @finfo_open(FILEINFO_MIME);
    if ($finfo != ”) {
    $mime_type = finfo_file($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)) {
    $mime_type = trim(@shell_exec(‘file -bi ‘ . escapeshellarg($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, $mime_type) {

    $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”);
    die();
    }

    }

    $fileSize = filesize ($cache_file);

    // send headers then display image
    header (‘Content-Type: ‘ . $mime_type);
    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);

    die();

    }

    }

    /**
    *
    */
    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;
    }

    }

    /**
    *
    */
    function checkExternal ($src) {

    $allowedSites = array(
    ‘flickr.com’,
    ‘picasa.com’,
    ‘blogger.com’,
    ‘wordpress.com’,
    );

    if (ereg(‘https://&#8217;, $src) == true) {

    $url_info = parse_url ($src);

    $isAllowedSite = false;
    foreach ($allowedSites as $site) {
    if (ereg($site, $url_info[‘host’]) == true) {
    $isAllowedSite = true;
    }
    }

    if ($isAllowedSite) {

    $filename = explode(‘/’, $src);
    $local_filepath = ‘temp/’ . $filename[count($filename) – 1];

    if (!file_exists($local_filepath)) {

    if (function_exists(‘curl_init’)) {

    $fh = fopen($local_filepath, ‘w’);
    $ch = curl_init($src);

    curl_setopt($ch, CURLOPT_URL, $src);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_USERAGENT, ‘Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0’);
    curl_setopt($ch, CURLOPT_FILE, $fh);

    if (curl_exec($ch) === FALSE) {
    if (file_exists($local_filepath)) {
    unlink($local_filepath);
    }
    displayError(‘error reading file ‘ . $src . ‘ from remote host: ‘ . curl_error($ch));
    }

    curl_close($ch);
    fclose($fh);

    } else {

    if (!$img = file_get_contents($src)) {
    displayError(‘remote file for ‘ . $src . ‘ can not be accessed. It is likely that the file permissions are restricted’);
    }

    if (file_put_contents($local_filepath, $img) == FALSE) {
    displayError(‘error writing temporary file’);
    }

    }

    if (!file_exists($local_filepath)) {
    displayError(‘local file for ‘ . $src . ‘ can not be created’);
    }

    }

    $src = $local_filepath;

    } else {

    displayError(‘remote host “‘ . $url_info[‘host’] . ‘” not allowed’);

    }

    }

    return $src;

    }

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

    $src = str_replace(‘https://&#8217; . $_SERVER[‘HTTP_HOST’], ”, $src);
    $src = str_replace(‘https://&#8217; . $_SERVER[‘HTTP_HOST’], ”, $src);
    $src = htmlentities($src);

    $src = checkExternal ($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);

    }
    ?>

    Well thankfully this script is pretty helpful and has a bool to turn it off or on. So currently your image url will look like this:

    https://tehbigwebtheory.com/wp-content/themes/newspress%201/timthumb.php?src=https://tehbigwebtheory.com/wp-content/uploads/2010/06/n21160605625_2296865_50971-300×300.jpg&w=256&h=172&zc=1

    but at the end you see zc=1 (the variable described as zoom crop), if we change this in the url to 0, it gives the result you’re after:

    https://tehbigwebtheory.com/wp-content/themes/newspress%201/timthumb.php?src=https://tehbigwebtheory.com/wp-content/uploads/2010/06/n21160605625_2296865_50971-300×300.jpg&w=256&h=172&zc=0

    So perhaps you are given the option to do this in the view file, however if not you could probably change this code slightly.

    If you were to change the line
    $zoom_crop = preg_replace("/[^0-9]+/", "", get_request("zc", 1));

    with simply
    $zoom_crop = 0;

    I think that should work

    Thread Starter CGrobbelaar

    (@cgrobbelaar)

    I changed it it now I cant do anything, not even change it back. It tells me even at my dashboard that it’s unable to connect to tehbigwebtheory. OMG HELP!

    If you’ve been using the editor within wordpress, that comes with a lot of problems! Such as, if theres any error in your code, it breaks everything.

    What you need to do is, if you’re on shared hosting, get filezilla (or an ftp program similar) and connect to the site and grab that php file and fix the error.

    If you’re unable to fix the error, tell me what error php gives you in the web browser and paste me your code. Its probably a missing ‘;’ or something syntaxy.

    Thread Starter CGrobbelaar

    (@cgrobbelaar)

    okay I got this sorted out out. I went on filezilla and changed the php. I checked if it transfered properly on my wp editor. It did. Problem is that is still is zoomed in!

Viewing 7 replies - 1 through 7 (of 7 total)
  • The topic ‘I'm new and having some image scaling issues’ is closed to new replies.