Basic PHP document management system, including automatic detection of corporate logos in letters
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  1. <?PHP
  2. /******************************************************************************\
  3. thumb.php: Generate thumbnail image of specified file.
  4. Copyright (C) 2004-2007 Chris 'MD87' Smith
  5. This program is free software; you can redistribute it and/or
  6. modify it under the terms of the GNU General Public License
  7. as published by the Free Software Foundation; either version 2
  8. of the License, or (at your option) any later version.
  9. This program is distributed in the hope that it will be useful,
  10. but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12. GNU General Public License for more details.
  13. You should have received a copy of the GNU General Public License
  14. along with this program; if not, write to the Free Software
  15. Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  16. |******************************************************************************|
  17. Usage:
  18. <img src="thumb.php?file_name.png"...>
  19. <img src="thumb.php?directory/file.jpg"...>
  20. <img src="thumb.php?http://www.example.com/file.jpg"...>
  21. \******************************************************************************/
  22. header('Cache-control: public');
  23. $image = $_SERVER['QUERY_STRING'];
  24. if (!file_exists($image)) {
  25. /* TODO: Output error image. */
  26. die();
  27. }
  28. if (file_exists('.thumbs/prog-' . md5($image))) {
  29. $mtime = filemtime('.thumbs/prog-' . md5($image));
  30. if ($mtime >= filemtime($image)) {
  31. header('Content-type: image/jpeg');
  32. readfile('.thumbs/prog-' . md5($image));
  33. exit;
  34. }
  35. }
  36. /* TODO: Optimise. */
  37. if (($imi = @imagecreatefromjpeg($image)) === FALSE) {
  38. if (($imi = @imagecreatefrompng($image)) === FALSE) {
  39. if (($imi = @imagecreatefromgif($image)) === FALSE) {
  40. /* TODO: Output error image. */
  41. die();
  42. }
  43. }
  44. }
  45. header('Content-type: image/jpeg');
  46. imageinterlace($imi, true);
  47. imagejpeg($imi, '.thumbs/prog-' . md5($image), 100);
  48. imagejpeg($imi, false, 100);
  49. ?>