Comments on: Dynamic Thumbnailing with Imagemagick in PHP

By: hermann

hermann — Mon, 18 May 2009 13:55:12 +0000

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

By: freestream

freestream — Thu, 05 Apr 2007 13:12:46 +0000

// 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.";
}

By: freestream

freestream — Thu, 05 Apr 2007 13:11:30 +0000

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

By: Kristin

Kristin — Tue, 28 Feb 2006 07:26:31 +0000

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?

By: Ahsan

Ahsan — Thu, 17 Nov 2005 02:03:13 +0000

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?

By: Sasha

Sasha — Fri, 20 May 2005 22:59:01 +0000

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);

By: namdev

namdev — Sun, 03 Apr 2005 03:41:19 +0000

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;

By: Jason

Jason — Wed, 09 Mar 2005 21:13:06 +0000

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);"

By: nick

nick — Mon, 18 Oct 2004 23:11:01 +0000

That means you didn't have a file to open/convert

By: Thumbnews

Thumbnews — Sat, 20 Mar 2004 16:38:45 +0000

I also get a division by zero error. Need help.