Resize Image for Dynamic thumbnail

ps2gamer

If I have 3 big wallpaper size image's and try to make a thumnail out of them using just html..the page loads extremely slow and is also laggy. So I thought I could use PHP GD functions to rezize the image dynamically, like this:

<img src="resize.php?image=wallpaper1.gif">

where resize.php resized the image to 100x100 no matter what the size of the image is....even if its 50 x 50 or 1000 x 1000. And resize.php needs to be able to resize bmp,jpg,jpeg,png, and gif formats (if its possible)😕

Can anyone help me out?

Mordecai

GD cannot do BMP, but it can do those other formats. Also, since you said speed is an issue, you will probably not want it to generate those thumbs on the fly every time. Instead, save them to a file.

Other than that, check out [man]imagecopyresized/man and [man]imagecopyresampled/man.

Shawazi

Here is the code I use to create thumbnails as I upload files to the server using a form.

// frontpic is the name of my file input field
$front = strtolower($frontpic_name);

// copies image and gets the size
@copy("$frontpic", "/home/path/$front");
@$size = GetImageSize("/home/path/$front");

//this creates a temp image from JPEG... you can also do from GIF and i think PNG too 
@$source_id = imageCreateFromJPEG("/home/path/$front");

//the size i want to use for my thumb
$dest_x = 45;
$dest_y = 62;

// creates thumbnail
@$target_id = imagecreatetruecolor($dest_x, $dest_y);
@$target_pic = imagecopyresampled($target_id,$source_id, 0, 0, 0, 0, $dest_x, $dest_y, $size[0],$size[1]);
// 75 is the quality i use where 100 is the best
@imagejpeg($target_id,"/home/path/thumb_$front", 75);