Dynamic Thumbnailing with Imagemagick in PHP

11 Responses to Dynamic Thumbnailing with Imagemagick in PHP

1. ralph hardwick says:

   Feb 14, 2004 at 1:48 am

   I get a division by zero error…any ideas?
2. Thumbnews says:

   Mar 20, 2004 at 10:38 am

   I also get a division by zero error. Need help.
3. nick says:

   Oct 18, 2004 at 5:11 pm

   That means you didn’t have a file to open/convert
4. Jason says:

   Mar 09, 2005 at 3:13 pm

   this code does not work.

   instead of:

   “system(“convert -geometry $new_img_width x $new_img_height $current_file $thumb_name”, $retval);”

   it needs to be:

   “exec(“convert -geometry $new_img_width x $new_img_height $current_file $thumb_name”, $retval);”
5. namdev says:

   Apr 02, 2005 at 9:41 pm

   It gives me error

   Warning: getimagesize
   No need to resize

   i think problem is with
   // This part gets the new thumbnail name
   $image_basename = $image_base[0];
   $image_ext = $image_base[1];

   $thumb_name = $image_basename.’-th.’.$image_ext;
6. Sasha says:

   May 20, 2005 at 4:59 pm

   Generated file is too big.

   Better to use -thumbnail like this:

   $make_magick = exec(“convert -thumbnail $new_img_width x $new_img_height $current_file $thumb_name”, $retval);
7. Ahsan says:

   Nov 16, 2005 at 8:03 pm

   I am using ur code on windows xp and it works fine if i put “dir” in the system command but when i write the convert command it doesn’t do anything. I tried the command in cmd in the same folder and it works great but not when executed from the php file. Please tell were am i going wrong?
8. Kristin says:

   Feb 28, 2006 at 1:26 am

   When I run the file… it gets all the way to “Thumbnail Created” but shows an x’d out image… and when i check the directory the file isn’t actually created… any ideas?
9. freestream says:

   Apr 05, 2007 at 7:11 am

   Well you can do it like that, but if you ever what it to work you might want to test this insted:
10. freestream says:

    Apr 05, 2007 at 7:12 am

    // Specify your file details
    $current_file = “P1010204.JPG”;
    $max_width = “150″;

    // Get the current info on the file
    $current_size = getimagesize($current_file);
    $current_img_width = $current_size[0];
    $current_img_height = $current_size[1];
    $image_base = explode(“.”, $current_file);

    // This part gets the new thumbnail name
    $image_basename = $image_base[0];
    $image_ext = $image_base[1];
    $thumb_name = $image_basename.”-th.”.$image_ext;

    // Determine if the image actually needs to be resized
    // and if it does, get the new height for it
    if ($current_img_width > $max_width)
    {
    $too_big_diff_ratio = $current_img_width/$max_width;
    $new_img_width = $max_width;
    $new_img_height = round($current_img_height/$too_big_diff_ratio);

    // Convert the file
    $make_magick = system(“convert -geometry ” . $new_img_width . “x” . $new_img_height . ” ” . $current_file . ” ” . $thumb_name, $retval);

    // Did it work?
    if (!($retval))
    {
    echo “Thumbnail created: “;
    }
    else
    {
    echo “Error: Please try again.”;
    }
    }
    else
    {
    echo “No need to resize.”;
    }
11. hermann says:

    May 18, 2009 at 10:55 pm

    Works like a charm, but it’s very slow.
    Could it be improved?