resize into thumbnail

shmert can you help? I can increase another 100 points.

this is the image source I get from my database

<img src='".$row[image]."' width='100'  height='200'>

someone Help please.

..

I really need a simple script that will auto resize my image to a thumbnail, can someone write me one?
let say I have an image width 100 height 200, I need the script to shrink it down say 100%?

As long as the picture don't stretch or skew...

No need to reinvent the wheel. Use this: http://mightystuff.net/thumbnail_script

Clemens

do you have gd available? If you do this is a nice class......


<?php

/**
*      class Image2Thumbnail
*   Thumbnail creation with PHP4
*
*
*   @author     Andreas Martens <heyn@plautdietsch.de>
*      @version      0.9
*/

class Img2Thumb      {

/**
*   Constructor - requires following vars:
*
*      @param string $filename                  image path
*
*      These are additional vars:
*
*      @param int $newxsize                  new maximum image width
*      @param int $newysize                  new maximum image height
*      @param string $fileout                  output image path
*
*/
      function Img2Thumb($filename, $newxsize=60,$newysize=60, $fileout='')      {
            global $HTTP_POST_VARS, $HTTP_GET_VARS, $HTTP_COOKIE_VARS;

            if (isset($HTTP_COOKIE_VARS)) $httpvars = $HTTP_COOKIE_VARS;
            else if (isset($HTTP_POST_VARS)) $httpvars =  $HTTP_POST_VARS;
               else if (isset($HTTP_GET_VARS)) $httpvars =  $HTTP_GET_VARS;

            $this -> NewImgCreate($filename,$newxsize,$newysize,$fileout);

      }

/**
*
*      private function - do not call
*
*/
      function NewImgCreate($filename,$newxsize,$newysize,$fileout)      {
            $type = $this->GetImgType($filename);

            if ($type=="png")      {
                   $orig_img = imagecreatefrompng($filename);
            }
            if ($type=="jpg")      {
                   $orig_img = imagecreatefromjpeg($filename);
            }

            $new_img =$this->NewImgResize($orig_img,$newxsize,$newysize,$filename);

            if (!empty($fileout))      {
                   $this-> NewImgSave($new_img,$fileout,$type);
            }
            else      {
                   $this->NewImgShow($new_img,$type);
            }

            ImageDestroy($new_img);
            ImageDestroy($orig_img);
      }

      /**
*
*      private function - do not call
*
*/
      function NewImgResize($orig_img,$newxsize,$newysize,$filename)      {

            $orig_size = getimagesize($filename);

            if ($orig_size[0]<$orig_size[1]){
                  $newxsize = $newysize * ($orig_size[0]/$orig_size[1]);
            }
            else{
                  $newysize = $newxsize / ($orig_size[0]/$orig_size[1]);
            }

            $im_out = ImageCreate($newxsize,$newysize);
            ImageCopyResized($im_out, $orig_img, 0, 0, 0, 0, $newxsize, $newysize, $orig_size[0], $orig_size[1]);
            return $im_out;
      }

      /**
*
*      private function - do not call
*
*/
      function NewImgSave($new_img,$fileout,$type)      {
            if ($type=="png")      {
                  if (substr($fileout,strlen($fileout)-4,4)!=".png")
                        $fileout .= ".png";
                   return imagepng($new_img,$fileout);
            }
            if ($type=="jpg")      {
                  if (substr($fileout,strlen($fileout)-4,4)!=".jpg")
                        $fileout .= ".jpg";
                   return imagejpeg($new_img,$fileout);
            }
      }

      /**
*
*      private function - do not call
*
*/
      function NewImgShow($new_img,$type)      {
            if ($type=="png")      {
                  header ("Content-type: image/png");
                   return imagepng($new_img);
            }
            if ($type=="jpg")      {
                  header ("Content-type: image/jpeg");
                   return imagejpeg($new_img);
            }
      }

      /**
*
*      private function - do not call
*
*/
      function GetImgType($filename)      {
            $size = getimagesize($filename);
            if($size[2]==2) return "jpg";
            elseif($size[2]==3) return "png";

      }

}

?>


Then put this script in the directory of images you want to thumbnail.......

<?php

// showthumb.php

//      Image2Thumbnail - class
include('/path/to/your/classes/thumbnailclass.php');

//      create new object
$neu = new Img2Thumb($filename,$newxsize,$newysize,$fileout);


?>

Then call the thumbnail like so.......

<img src="/images/full_size/showthumb.php?filename='.$original_image.'&newxsize=50&newysize=50">

Works well for me

Using.........

GD Version 1.6.2 or higher

P.S. The script above originally came from http://www.phpclasses.org/ Great site for finding classes to do pretty much anything.

You can use imagemagik from: http://www.imagemagick.org/

You can download/install it, then run exec ("convert yourfile -resize widthxheight")

ImageMagik has a lot of other nifty features too.

You can use imagemagik from: http://www.imagemagick.org/

You can download/install it, then run exec ("convert yourfile -resize widthxheight")

ImageMagik has a lot of other nifty features too.

Mark_Kendall ,

I do not know how to apply to my code..

others,

same as above..

Hot damn, this works!
Use a scale of .5 to shrink the image to half its original size.  50%.  To shrink an image by 100%, just delete it. :-)

function resizeImage($from, $to, $scale=0.5) {
        $src = imagecreatefromjpeg($from);
        list($x, $y) = getimagesize($from);
        $out = imagecreatetruecolor($x * $scale, $y * $scale);
        imagecopyresampled($out, $src, 0, 0, 0, 0, $x * $scale, $y * $scale, $x, $y);
        imagejpeg($out, $to);
}
 
resizeImage('Lucy.jpg', 'Lucy_small.jpg', .5);

Oops, forgot the cleanup code, you should probably call imagedestroy() in there to free up memory for very large images:

function resizeImage($from, $to, $scale=0.5) {
        $src = imagecreatefromjpeg($from);
        list($x, $y) = getimagesize($from);
        $out = imagecreatetruecolor($x * $scale, $y * $scale);
        imagecopyresampled($out, $src, 0, 0, 0, 0, $x * $scale, $y * $scale, $x, $y);
        imagejpeg($out, $to);
        imagedestroy($from);
        imagedestroy($out);
}
 

Hi shmert,


what is $from?
What is $to?

how to call out the image?


thanks alot

$from = '/path/to/the/src/image'; // image to be resized
$to = '/path/to/target/image'; // path where the image will be written

so I might call resizeImage('/uploads/bigImage.jpg', '/usr/local/apache/htdocs/thumbnails/bigImage_thumb.php');

this will write the bigImage_thumb.php to my apache folder in the "thumbnails" directory.  Then I just put this on my HTML page:

<img src="/thumbnails/bigImage_thumb.php">

NOTE:  the thumbnails directory needs to be writable by PHP!

If you don't want to write the thumbnail to a file, but just want to display it in the browser, do something like this:

<?php
#thumb.php
header("Content-type: image/jpg");
$from = '/path/to/big_image.jpg'; // maybe this could be a parameter passed in the URL
$src = imagecreatefromjpeg($from);
if (!$src) die("Unable to locate src image at $src);
list($x, $y) = getimagesize($from);
$out = imagecreatetruecolor($x * $scale, $y * $scale);
imagecopyresampled($out, $src, 0, 0, 0, 0, $x * $scale, $y * $scale, $x, $y);
imagejpeg($out);
imagedestroy($from);
imagedestroy($out);
?>

YEs I just want to display it to a browser but I got errors..

>>>>>>>>>>
Warning: imagecreatetruecolor(): Invalid image dimensions in /home/sample/public_html/sample.php on line 25
<<<<<<<<<<<<<<


my $from = 'http://www.domain.com/pics/sample.jpg';


anything wrong?

<?php
#thumb.php
header("Content-type: image/jpg");
$from = ''http://www.domain.com/pics/sample.jpg'; // maybe this could be a parameter passed in the URL
$src = imagecreatefromjpeg($from);
if (!$src) die("Unable to locate src image at $src);
list($x, $y) = getimagesize($from);
$out = imagecreatetruecolor($x * $scale, $y * $scale);
imagecopyresampled($out, $src, 0, 0, 0, 0, $x * $scale, $y * $scale, $x, $y);
imagejpeg($out);
imagedestroy($from);
imagedestroy($out);
?>

Yes, the $from needs to be a local file, to get the dimensions.

I input the correct path to my image but it still show that error..

I tried it but it displayed garbage text.

Why is it so?

header("Content-type: image/jpeg");

try that instead of jpg

hmm.. still the same received garbage.

Do you see any error messages in with the garbage?  There can't be any whitespace outside the <?php ... ?> tags, or the header won't work.   The header("Content-type: image/jpeg"); needs to be the very first thing that gets output.  This PHP script is essentially telling the browser it's an image.  The garbage is the image data.  Anything besides the garbage will be interpreted as a corrupt image, and won't be displayed properly.

yes, no whitespace outside the tags.

the error message in the garbage readable is "CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), default quality"

Make sure you have the line
header("Content-type: image/jpeg");
in there.

If you see garbage and text, then the header() function isn't working right.  You should either see your resized image, or a broken image icon.  Maybe a blank screen.  But definitely not garbage.

To test this out, make a test page like this:

<?php
header("Content-type: image/jpeg");
readfile("/path/to/image.jpg");
?>

it should be an image.  If you take off the header(), you'll see similar garbage text.

Go ahead and paste the contents of your script in here, I'll take a look at it.

Check out this webpage: http://www.hotscripts.com/PHP/Scripts_and_Programs/Image_Manipulation/index.html

There are many thumbnail solutions/tutorials here.

Good luck,
-Ron

<?php
header("Content-type: image/jpeg");
readfile(''/pics/sample.jpg");
?>


Yes it shows the image, and I took the header off, it shows the image also.

Does this show as garbage?
<?php
header("Content-type: text/plain");
readfile(''/pics/sample.jpg");
?>

>>>>>>>>>>.

Does this show as garbage?
<?php
header("Content-type: text/plain");
readfile(''/pics/sample.jpg");
?>
<<<<<<<<<<<<<<<<<<<<<


no it still show as a image..

nevermind.. I guess..