[digioz]

I have a PHP code that generates thumbnails on the fly. I have been using it without a problem on both Windows and Linux Servers for a while now. However on a new server we recently aquired, the resulting thumbnails are a black rectangular box (dimesion 100x100).

Anyone know anything about this issue? I am posting the code I use to generate the thumbnail FYI:

PHP Code:

function createthumb($name,$filename,$new_w,$new_h)
{
$system=explode(".",$name);
if (preg_match("/jpg|jpeg/",$system[1])){$src_img=imagecreatefromjpeg($name);}
if (preg_match("/png/",$system[1])){$src_img=imagecreatefrompng($name);}
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
if ($old_x > $old_y) 
{
$thumb_w=$new_w;
$thumb_h=$old_y*($new_h/$old_x);
}
if ($old_x < $old_y) 
{
$thumb_w=$old_x*($new_w/$old_y);
$thumb_h=$new_h;
}
if ($old_x == $old_y) 
{
$thumb_w=$new_w;
$thumb_h=$new_h;
}
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y); 
if (preg_match("/png/",$system[1]))
{
imagepng($dst_img,$filename); 
} else {
imagejpeg($dst_img,$filename); 
}
imagedestroy($dst_img); 
imagedestroy($src_img); 
} 

The Server has the following GD Information:

Code:

GD Support enabled 
GD Version bundled (2.0.28 compatible) 
FreeType Support enabled 
FreeType Linkage with freetype GIF Read Support enabled 
GIF Create Support enabled 
JPG Support enabled 
PNG Support enabled 
WBMP Support enabled 
XBM Support enabled

I would appreciate any info on this issue. Thanks.

[mab]

Is this line just due to posting here or is the source like that (white space between $thum and b_w) -

PHP Code:

imagecopyresampled($dst_img,$src_img,0,0,0,0,$thum  b_w,$thumb_h,$old_x,$old_y); 

The $thum b_w might be causing a zero width result.

[mab]

I tried this on a PHP4 windows shared hosting system and a local PHP5 windows development system and it works OK. About the only problem I had that duplicates what you are seeing is when the source $name file does not exist or is not at the path used in the call to the function. The imagecreatefrom... function returns a false.

[digioz]

Yeah, that white space is because of the forum software. It doesn't exist in my function.

Originally Posted by mab

Is this line just due to posting here or is the source like that (white space between $thum and b_w) -

PHP Code:

imagecopyresampled($dst_img,$src_img,0,0,0,0,$thum b_w,$thumb_h,$old_x,$old_y); 

The $thum b_w might be causing a zero width result.

[digioz]

I am 100% sure that both the path is correct and the image file exists in the path specified. So I am sure that's not it, although either of those two mistakes would generate a similar black thumbnail.

Originally Posted by mab

I tried this on a PHP4 windows shared hosting system and a local PHP5 windows development system and it works OK. About the only problem I had that duplicates what you are seeing is when the source $name file does not exist or is not at the path used in the call to the function. The imagecreatefrom... function returns a false.