text onto jpg error

[graham23s]

Hi Guys,

i did some pretty basic testing with GD , this code should overlay a watermark/text on uploaded images but im getting a few errors:

part of the code:

PHP Code:

<?php
$uploaddirectory = "uploads/".$renamedimage;

          // Get identifier for white
          $white = imagecolorallocate($uploaddirectory, 255, 255, 255);

          // Add text to image
          imagestring($uploaddirectory, 3, 5, imagesy($uploaddirectory)-20, 'www.xxx.com', $white);
?>

errors:

PHP Code:

Warning: imagecolorallocate(): supplied argument is not a valid Image resource in /home/.castle/graham23s/www.site.com/uploadpic.php on line 78

Warning: imagesy(): supplied argument is not a valid Image resource in /home/.castle/graham23s/www.site.com/uploadpic.php on line 81

Warning: imagestring(): supplied argument is not a valid Image resource in /home/.castle/graham23s/www.site.com/uploadpic.php on line 81 


not sure what to make of the errors exactly, does it mean the image isn't getting picked up by the gd functions?

cheers guys

Graham

[Inigoesdr]

The image resource has to be created with imagecreatetruecolor() before you try to use it.

[graham23s]

Hi Mate,

i tried making a function for it:

PHP Code:

<?php
    ## watermark function
    watermark_image($filename,$uploaddirectory);
?>

This passes the $filename of the uploaded file to get the extension

function:

PHP Code:

<?php
     function watermark_image($filename,$uploaddirectory) { 
     
        ## Using GD
        ## Find out the files extension 
        $extension = explode(".", $filename); 
        $extension = $extension[count($extension)-1]; 
        
        ## Make all filenames lowercase
        $extension = strtolower($extension);    
        
          ## Generate image accordingly  
          if($extension == "jpg" || $extension == "jpeg" || $extension == "pjpeg") {
          
          $image = imagecreatefromjpeg($uploaddirectory); 
          
            } elseif($extension == "png") {        
          
          $image = imagecreatefrompng($uploaddirectory); 
          
            } elseif($extension == "gif") {
            
          $image = imagecreatefromgif($uploaddirectory); 
            
            }  
            
          $white = imagecolorallocate($image, 255, 255, 255);

          imagestring($image, 3, 5, imagesy($image)-20, 'www.site.com', $white);
          
          echo $extension;
        
        
        }
?>

this all looks ok , but when i test it, it just uploads without any errors (but doesn't overlay the text) so theres no errors to speak of, if i echo out the extension it's fine

can you see any errors at all?

thanks mate

Graham

[Inigoesdr]

You aren't using any output functions like imagejpeg(). To find out where you're getting an error turn on error_reporting() and var_dump() the results of your functions.

[aedrin]

Or check your apache/IIS logs to see the errors. You can't see errors in an image, but this doesn't mean there were none.

[graham23s]

Hi Guys,

thanks for the help i got it fixed

Graham