[FiRe]

I am looking for a php thumbnail creator that will:

* read a directory for all the jpegs in it
* resize each picture to 100x100 and save it as a "$name_thumbnail.jpg"
* return all the thumbnail urls

I dont want the original jpegs affected at all! Can anyone find any function like this??

[Acecool]

I can create this if you like.

Its a matter of reading the directory, getting the file properties, the name etc, setting the images to a session and then creating the images, refresh on every page, if the "first" key is done, delete from array and do next, if failed add to end.

[dennispopel]

As it may seem simple at the first glance, what are you going to do if new pics are added to the directory you already processed? I would suggest that a thumbnail be generated as the files are uploaded. However, if they are added by, e.g., FTP, then I would suggest that thumbs are created in real time (imagine someone names a file mypic_thumbnail)? The thumb generator could as well employ caching to reduce traffic and load.

[FiRe]

no the generated images will be stored in a db and then compared, u dont have to worry about it just if someone could point me in the right direction wud be great...

[Acecool]

Id use glob() or readdir() to get *.jpg
Then use the image functions to generate if they do not exist.

[FiRe]

its the resizing and creating new img bit that i am stuck on!

[Acecool]

Well, as I am still writing up new content for the new ACMS, the thumbnail generation tutorial isnt up yet :-/

Here are a few pointers though:

Need the extension to determine which function to use

PHP Code:

        $Extended_File_Info = pathinfo($Image);

        $File_Extension = $Extended_File_Info['extension'];



        switch ($File_Extension)

        {

            case 'jpg':

                if (function_exists('imagecreatefromjpeg'))

                {

                    $Source_Image = imagecreatefromjpeg($Image);

                }

                else

                {

                    return FALSE;

                }

            break;

        

            case 'gif':

                if (function_exists('imagecreatefromgif'))

                {

                    $Source_Image = imagecreatefromgif($Image);

                }

                else

                {

                    return FALSE;

                }

            break;

    

            case 'png':

                if (function_exists('imagecreatefrompng'))

                {

                    $Source_Image = imagecreatefrompng($Image);

                }

                else

                {

                    return FALSE;

                }

            break;

        } 

Thats for the source image, the big image if you will...

Now, you create a new image:
And copy the source image to the new one..

PHP Code:

$New_Image = imagecreatetruecolor($New_Width, $New_Height);

imagecopyresized($New_Image, $Source_Image, 0, 0, 0, 0, $New_Width, $New_Height, $Width, $Height); 

Also, width and height are from the main image:
list($Width, $Height) = getimagesize($Source_Image);


Output and save it:
imagepng($New_Image, $Output_Image);
Saves the new image as 'Output image should be the new name with extension'


Edit:
Sorry its so sloppy at the moment, its still not optimized and all..

[Sabu]

I've made a script that, whanever you look at the thumbnail page, it goes through each picture in a given directory. If there exists a thumbnail for it, it shows the thumbnail, otherwise it creates one and shows that. Fast loading except for the first time each thumb is shown.

Currently it makes all thumbnails in the same directory, named as an md5 hash of the original file for duplicates.

I don't have it handy within reasonable reaching space for this early in the morning, but message me perhaps and I'll see what I can do.

[FiRe]

well ace this is what I got...

PHP Code:

<?php



function imgsource($Image) {

$Extended_File_Info = pathinfo($Image); 

        $File_Extension = $Extended_File_Info['extension']; 



        switch ($File_Extension) 

        { 

            case 'jpg': 

                if (function_exists('imagecreatefromjpeg')) 

                { 

                    $Source_Image = imagecreatefromjpeg($Image); 

                } 

                else 

                { 

                    return FALSE; 

                } 

            break; 

         

            case 'gif': 

                if (function_exists('imagecreatefromgif')) 

                { 

                    $Source_Image = imagecreatefromgif($Image); 

                } 

                else 

                { 

                    return FALSE; 

                } 

            break; 

     

            case 'png': 

                if (function_exists('imagecreatefrompng')) 

                { 

                    $Source_Image = imagecreatefrompng($Image); 

                } 

                else 

                { 

                    return FALSE; 

                } 

            break; 

        } 

}





$Source_Image = imgsource("truck.jpg");

list($Width, $Height) = getimagesize("truck.jpg");

$New_Image = imagecreatetruecolor("100", "100");

$Output_Image = imagecopyresized($New_Image, $Source_Image, 0, 0, 0, 0, "100", "100", $Width, $Height);



$done = imagepng($New_Image, $Output_Image);



$filename = rand(100000,999999)."temp.jpg";

$tempfile = fopen($filename, "w+");

fwrite($tempfile, $done);

fclose($tempfile);



echo "<img src=\"$filename\">";

?>

Warning: imagecopyresized(): supplied argument is not a valid Image resource
Warning: imagepng(): Invalid filename '' on line 50

[Acecool]

remove:
$Source_Image = imgsource("truck.jpg");