image resize

[envexlabs]

Hello,

 

I have an image path stored in a database.

 

ie. uploads/pics/picture.jpg

 

How can i grab that image, and create a thumbnail from it?

 

Thanks,

 

envex

[php_tom]

You need the GD lib installed for this to work (look in phpinfo() to see if you do):

 

function img_resize($image) {
  $filename = $image;
  header('Content-type: image/jpeg');
  $percent = 0.22;
  list($width, $height) = getimagesize($filename);
  $newwidth = $width * $percent;
  $newheight = $height * $percent;
  $thumb = imagecreatetruecolor($newwidth, $newheight);
  $source = imagecreatefromjpeg($filename);
  imagecopyresampled($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
  imagejpeg($thumb);
}

 

So you use it like so:

img_resize("/images/large_pics/pic1028489.jpg");

 

Yeah and it only works on JPGs too, though you can fix this by using imagecreatefromgif($filename); and imagecreatefrompng($filename); if you want.

[envexlabs]

Hey,

 

So i tried the function and i'm getting this, and it's not working

 

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), default quality

 

Then a bunch of jibberish.

 

any ideas?

     

           

[php_tom]

did you print/echo anything out after the function call?

 

that would break the page... what you need to do is something like this:

 

"img_resize.php":

img_resize("myImage.jpg");
function img_resize($image) {
  $filename = $image;
  header('Content-type: image/jpeg');
  $percent = 0.22;
  list($width, $height) = getimagesize($filename);
  $newwidth = $width * $percent;
  $newheight = $height * $percent;
  $thumb = imagecreatetruecolor($newwidth, $newheight);
  $source = imagecreatefromjpeg($filename);
  imagecopyresampled($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
  imagejpeg($thumb);
}

 

Then in "myPage.php" something like:

<img src='img_resize.php" />

 

Hope that helps.