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php zoom image code

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Release: 2016-07-25 08:45:18
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  1. // Specify the file path and scaling ratio
  2. $filename = 'test.jpg';
  3. $percent = 0.5;
  4. // Specify the header file Content type value
  5. header('Content-type: image/jpeg');
  6. // Get the width and height of the image
  7. list($width, $height) = getimagesize($filename);
  8. $newwidth = $width * $percent;
  9. $newheight = $height * $percent;
  10. // Create an image. The received parameters are width and height respectively, and the generated resource handle is returned.
  11. $thumb = imagecreatetruecolor($newwidth, $newheight);
  12. //Get the source file resource handle. The received parameter is the image path and the handle is returned
  13. $source = imagecreatefromjpeg($filename);
  14. // Cut all fields of the source file and reduce it to the target image. The first two are resource handles
  15. imagecopyresampled($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
  16. // Output to the browser
  17. imagejpeg($thumb);
  18. ?>
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