php and gd (image functions)

devfreak · 05-05-2005, 08:28 AM

for some reason I can't get any of PHP's image functions to work on my company's dedicated server. If someone who has had a headache with this could share my headache with me, it would be awesome. Here's my phpinfo()

http://www.saunders-usa.com/test.php

And just for reference, here's the phpinfo() of a server that I know can run them, because they were posting example scripts:

http://smallcapitalbusiness.com/phpinfo.php

I have gd installed and enabled, so I don't know what the deal is. Basically instead of shrinking images that the other site can shrink, it gives a broken image (or in firefox, says that the image has problems)

polrus · 05-11-2005, 05:17 PM

i think ur shrinking script may be wrong

if gd wasnt properly installed You would get an error in php about some functions not beeing defined (for example with imagecreatefromjpeg function form the script bellow)

i spend a lot of time playing with shrinking script so if u want You cna see how i do it with my script that displays an image with it's path stored in mysql

as a parameter u give only the image number and the scripts gets the path from mysql table - after that it checks wether there is already a thumbnail-it there's not it generates it and saves it for future use.

so the gallery entry looks like this
(example)

PHP Code:



<a href="galeria.php?strona_obrazka=17&language="><img src="http://centrum.gliwice.pl/~azm/sep/galeria/thumb/obrazek.php?image_path=http://centrum.gliwice.pl/~azm/sep/galeria/DSC_3772copy.jpg" border="0"></a>

and the obrazek.php script looks like that

PHP Code:



<? 
    //$image_path paramtr z nazwa pliku i sciezka 
 
 
    $thumbnail_name=end(explode('/',$image_path));    
    $thumbnail=str_replace($thumbnail_name,"thumb/$thumbnail_name",$image_path); 
    
 
 if (!file_exists("$thumbnail_name"))   
   {  
    define(IMAGE_BASE, ''); 
    define(MAX_WIDTH, 150); 
    define(MAX_HEIGHT, 150); 
 
    # Get image location 
    //$image_file = str_replace('..', '', $_SERVER['QUERY_STRING']); 
    //$image_path = $image_file; 
 
    //echo "<BR>sciezka : $image_path<BR>"; 
    # Load image 
     
    $img = null; 
    $ext = strtolower(end(explode('.', $image_path))); 
    if ($ext == 'jpg' || $ext == 'jpeg') { 
    $img = imagecreatefromjpeg($image_path); 
    } else if ($ext == 'png') { 
    $img = imagecreatefrompng($image_path); 
    # Only if your version of GD includes GIF support 
    } else if ($ext == 'gif') { 
    $img = imagecreatefrompng($image_path); 
    } 
 
    # If an image was successfully loaded, test the image for size 
    if ($img) 
      { 
        # Get image size and scale ratio 
        $width = imagesx($img); 
        $height = imagesy($img); 
        $scale = min(MAX_WIDTH/$width, MAX_HEIGHT/$height); 
 
        # If the image is larger than the max shrink it 
        if ($scale < 1) 
          { 
            $new_width = floor($scale*$width); 
            $new_height = floor($scale*$height); 
 
            # Create a new temporary image 
            $tmp_img = imagecreatetruecolor($new_width, $new_height); 
            //$tmp_img = imagecreate($new_width, $new_height); 
            # Copy and resize old image into new image 
            imagecopyresized($tmp_img, $img, 0, 0, 0, 0, 
                         $new_width, $new_height, $width, $height); 
            imagedestroy($img); 
            $img = $tmp_img; 
          } 
        } 
 
   # Create error image if necessary 
   if (!$img) 
    { 
//     $img = imagecreate(MAX_WIDTH, MAX_HEIGHT); 
     $img = imagecreatetruecolor(MAX_WIDTH, MAX_HEIGHT); 
     imagecolorallocate($img,0,0,0); 
     $c = imagecolorallocate($img,70,70,70); 
     imageline($img,0,0,MAX_WIDTH,MAX_HEIGHT,$c2); 
     imageline($img,MAX_WIDTH,0,0,MAX_HEIGHT,$c2); 
     } 
 
   #save to file for future displays 
//   @imagejpeg($img,$thumbnail); 
    
   # Display the image 
   header("Content-type: image/jpeg"); 
   //echo "$thumbnail_name"; 
   imagejpeg($img,"$thumbnail_name"); 
    
   imagejpeg($img);    
  } 
   
  else  
    { 
      $img = imagecreatefromjpeg($thumbnail); 
       
      if (!$img) 
       { 
         //$img = imagecreate(MAX_WIDTH, MAX_HEIGHT); 
         $img = imagecreatetruecolor(MAX_WIDTH, MAX_HEIGHT); 
          imagecolorallocate($img,0,0,0); 
          $c = imagecolorallocate($img,70,70,70); 
          imageline($img,0,0,MAX_WIDTH,MAX_HEIGHT,$c2); 
          imageline($img,MAX_WIDTH,0,0,MAX_HEIGHT,$c2); 
       } 
       
      header("Content-type: image/jpeg"); 
      imagejpeg($img);  
    }  
    
?>

let me know if it worked , as creating thumbnails is probably what u wanted to achive