creating thumbnail from uploaded image

eyeofthestorm

i have an upload form and when i upload an image, i want the image i upload to go into a directory i have "photos/"(the upload form already does this...) and i want a copy of the image to be resized to 39x51 and put into a diff. directory "photos/thumbs". Any suggestions? here is my current code:

<?php
if ($_FILES['file']['type'] == "image/gif"){
    $target_path = "../photos/";
	$thumb_path = $target_path."thumbs/";
	$target_path = $target_path . basename( $_FILES['file']['name']);
	if(move_uploaded_file($_FILES['file']['tmp_name'], $target_path)) {
        echo "The file ". basename( $_FILES['file']['name']). " has been uploaded<br>";
} else{
     echo "There was an error uploading the file, please try again!";
} 
} else {
    die("File must be an image<br>");
}
?>

qest

Gd is the tool for the job.

After moving the original photo, you should do something like this (off the top of my head):

$gd_input_image = imagecreatefromgif($target_path);
//create a gd image resource from freshly moved photo.
$gd_ouput_image = imagecreatetruecolor(39, 51);
//create a blank image that you will copy to. The important thing to note here is the truecolor portion. If you don't include this, your thumbnail will have a very limited palette (sp?) and look like crap.
imageCopyResized($gd_ouput_image, $gd_input_image, 0, 0, 0, 0, 39, 51, ImageSX($gd_input_image), ImageSY($gd_input_image));
//this is the actual resizing part. this function copys and resizes $gd_input_image to $gd_ouput_image. You should take a look at the manual for more detail on this function.
imagepng($gd_ouput_image, $output_path);
// writes the thumbnail to file (not sure what you want it named, so you'll have to finish this). I would use png for the image format, because they are too small to justify lossy compression (jpeg) and might look really poor with a small palette (gif) - just a though.

I think that's right. Also, you should look into gd's functions.

Hope that helps.

Qest

Weedpacket

Searching the forums for the word "thumbnail" will also give you some ideas.

eyeofthestorm

thanks for the help guys!