embed logo on upload image in php

[neovantage]

Hey All,

I want to embed logo while upload an image. I mean when i upload an image, i want to embed the logo of the website in that uploaded image.

Kindly help me out to sort out my problems and as i always get a reply from this great community so i believe again i will get the solution of my problem here.

kind regards,
Mohsin Rafique

[Dormilich]

check out imagecopymerge(). especially the comments.

[neovantage]

Thank you very much
I will study n try to do that. As soon as i will do i will be back with that solution

[neovantage]

Hey Dormilich,
I found a function from there which is exactly up to my requirement but in my case it is not working and show dirty characters after creating image.

Here is my code i am using for uploading and for watermarking

$file_extension=strtolower(get_ext($_FILES['photo_1']['name']));
$photo_1="images/cars/".time().'_1.'.$file_extension;
move_uploaded_file($_FILES['photo_1']['tmp_name'],$photo_1);
$imageproduct = new Thumbnail($photo_1, 640, 480, 100);
$imageproduct->save($photo_1);
$watermarklogo="images/logo_png.png";
watermark($photo_1,$watermarklogo);
 

And this is the function i got from there which comes up to my requirement

function watermark($sourcefile, $watermarkfile) {
        #
        # $sourcefile = Filename of the picture to be watermarked.
        # $watermarkfile = Filename of the 24-bit PNG watermark file.
        #
 
        //Get the resource ids of the pictures
        $watermarkfile_id = imagecreatefrompng($watermarkfile);
 
        imagealphablending($watermarkfile_id, false);
        imageSaveAlpha($watermarkfile_id, true);
 
        $fileType = strtolower(substr($sourcefile, strlen($sourcefile)-3));
 
        switch($fileType) {
            case('gif'):
                $sourcefile_id = imagecreatefromgif($sourcefile);
                break;
            case('png'):
                $sourcefile_id = imagecreatefrompng($sourcefile);
                break;
            default:
                $sourcefile_id = imagecreatefromjpeg($sourcefile);
        }
        //Get the sizes of both pix  
        $sourcefile_width=imagesx($sourcefile_id);
        $sourcefile_height=imagesy($sourcefile_id);
        $watermarkfile_width=imagesx($watermarkfile_id);
        $watermarkfile_height=imagesy($watermarkfile_id);
 
        $dest_x = ( $sourcefile_width / 2 ) - ( $watermarkfile_width / 2 );
        $dest_y = ( $sourcefile_height / 2 ) - ( $watermarkfile_height / 2 );
 
        // if a gif, we have to upsample it to a truecolor image
        if($fileType == 'gif') {
            // create an empty truecolor container
            $tempimage = imagecreatetruecolor($sourcefile_width, $sourcefile_height);
               // copy the 8-bit gif into the truecolor image
            imagecopy($tempimage, $sourcefile_id, 0, 0, 0, 0, $sourcefile_width, $sourcefile_height);
              // copy the source_id int
            $sourcefile_id = $tempimage;
        }
        imagecopy($sourcefile_id, $watermarkfile_id, $dest_x, $dest_y, 0, 0, $watermarkfile_width, $watermarkfile_height);
        //Create a jpeg out of the modified picture
        switch($fileType) {    
            // remember we don't need gif any more, so we use only png or jpeg.
            // See the upsaple code immediately above to see how we handle gifs
            case('png'):
                header("Content-type: image/png");
                imagepng ($sourcefile_id);
                break;
            default:
                header("Content-type: image/jpg");
                imagejpeg ($sourcefile_id);
        }
        imagedestroy($sourcefile_id);
        imagedestroy($watermarkfile_id);
    }
 

kindly help me out to sort out my problem pleaseeeee

[Dormilich]

any errors, warnings, notices? have you tried with bare/sample images (without uploading) first? did you check the function return values?

[neovantage]

Yeh it post and give warning message.
And also show dirty characters in it.

I am attaching the image of it

[Dormilich]

what does the error message say? (too small to read). the error message directly involves the "dirty characters", once you clear the error it should be ok.

EDIT: the "dirty characters" are actually your picture… expressed as string

[neovantage]

It is saying that cannot modify header information

Warning: Cannot modify header information - headers already sent by (output started at E:\server\htdocs\themosaicdesigns\site\projects\ca rsbay\includes\thumbnail.class.php:423) in E:\server\htdocs\themosaicdesigns\site\projects\ca rsbay\edit-photos.php on line 272

[Dormilich]

what does

output started at E:\server\htdocs\themosaicdesigns\site\projects\ca rsbay\includes\thumbnail.class.php:423

refer to?

[Markus]

@neovantage
On line 423 of E:\server\htdocs\themosaicdesigns\site\projects\ca rsbay\includes\thumbnail.class.php, you have sent output to the browser. You cannot do that if you intend to modify the headers later.

[neovantage]

Basically thumbnail.class.php resize my uploaded image.
What i want actually is
i want to upload pictures. Pictures may be large in size so i have to resize them as the client requirement. Now he want that When an image upload then it must be resize and also this process embed his website logo tu the uploaded image and that is what i am trying to do.

i am using thumbnail.class which resize the uploaded image and save it to the required path.

If i even exclude it even then it shows n give me dirty characters and do not embed logo into the uploaded image

[neovantage]

So what should i do now.

As i need to upload the image, embed logo into uploaded image, then i need to resize the image and then need to save it

[neovantage]

Sir i want that when i upload an image it get that image.
1. Upload it to the server
2. Embed logo into it
3. Resize it too.

These 3 things i want to do

Awaiting of your guideline to do these step by step

[Dormilich]

first, check what's causing the output in thumbnail.class.php on line 423.

[neovantage]

i am attaching the file thumbnail.class.php file as in line 423 there is nothing in it

[Dormilich]

you have 2 line breaks after the closing "?>", that counts as output–remove them.

you should use "<?php" as start tag, not every system allows short tags.

[Markus]

@Dormilich
To prevent accidental output after the closing PHP tag, you can just omit it all together. This is a common practice, and is, I believe, enforced in the Zend Coding Standard.

[neovantage]

But my problem is still there.
I still unable to do these 3 tasks simultaneously
1. Upload it to the server
2. Embed logo into it
3. Resize it too.

So what should i do now? i am still there from where i start

[neovantage]

Hey Dormilich and Markus,
Hope you are best in health and life. So please guide me what should i do now so that i can upload images, embed logos and resize them simultaneously.

Awaiting of your reply
Mohsin Rafique

[n8kindt]

@neovantage
this is a long thread. i didn't see that you ever cleared this error and it might be the source of your problem. i'm guessing the offending line is trying to send the file type information to the header. you can't do this if you've already sent information to the browser (eg using the function 'echo');

there is a workaround for delaying that information from being sent immediately and still modify the header. try putting ob_start(); on the first line of your php code and ob_get_clean(); on the last line of your php code. you can also read about output buffering here: http://us2.php.net/manual/en/intro.outcontrol.php

[neovantage]

my script is uploading picture now and also resizing them. But when i embed logo into the picture it output the embedded log picture into the same window. But how can i overwrite that new picture on the existing picture on the directory path.

Please find the attached images of the output.

[n8kindt]

i think this might help you: http://koivi.com/php-gd-image-watermark/

i haven't looked at the available source code but i believe what you need is there. if not, google "php gd watermark"