Image upload with resize - php

Question

i have a upload script and that works fine, but i want that its upload twice, one orginal format and one in a thubm size.
I did allready search on google and stackoverflow and i tried allready something, but i dont get it work.
My upload script
// If you want to ignore the uploaded files,
// set $demo_mode to true;
$demo_mode = false;
$upload_dir = 'uploads/';
$allowed_ext = array('jpg','jpeg','png','gif');
include('./../includes/core.php');
if(strtolower($_SERVER['REQUEST_METHOD']) != 'post'){
exit_status('Error! Wrong HTTP method!');
}
if(array_key_exists('pic',$_FILES) && $_FILES['pic']['error'] == 0 ){
$pic = $_FILES['pic'];
if(!in_array(get_extension($pic['name']),$allowed_ext)){
exit_status('Alleen '.implode(',',$allowed_ext).' bestanden zijn toegestaan');
}
if($demo_mode){
// File uploads are ignored. We only log them.
$line = implode(' ', array( date('r'), $_SERVER['REMOTE_ADDR'], $pic['size'], $pic['name']));
file_put_contents('log.txt', $line.PHP_EOL, FILE_APPEND);
exit_status('Uploads are ignored in demo mode.');
}
// Move the uploaded file from the temporary
// directory to the uploads folder:
$name = $pic['name'];
$sname = hashing($name);
$datum = date("d-m-Y");
if(move_uploaded_file($pic['tmp_name'], $upload_dir.$sname)){
mysql_query("INSERT INTO foto VALUES ('','".$pic['name']."','".$sname."', '".$datum."', '0')");
exit_status('Bestand succesvol geupload');
}
}
exit_status('Er is iets mis gegaan!');
// Helper functions
function exit_status($str){
echo json_encode(array('status'=>$str));
exit;
}
function hashing($naam){
$info = pathinfo($naam);
$ext = empty($info['extension']) ? '' : '.' . $info['extension'];
$hash = basename($naam, $ext);
$hash = $hash . genRandomstring();
$hash = md5($hash);
$hash = $hash . '-' . genRandomstring();
return $hash . $ext;
}
function genRandomString() {
$length = 5;
$string = "";
$characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-+!#"; // change to whatever characters you want
while ($length > 0) {
$string .= $characters[mt_rand(0,strlen($characters)-1)];
$length -= 1;
}
return $string;
}
function get_extension($file_name){
$ext = explode('.', $file_name);
$ext = array_pop($ext);
return strtolower($ext);
}
?>
If someone can help me? I will be very happy then becuase i have allready try this for a week and i can get it out.
Thanks, Chris

Answer 1

You have the image uploaded once, which is all you need, then use that to create the second thumbnail file.
Try looking over the GD documentation.

Answer 2

as mentioned before you don't need to upload twice, copy and resize image once it's uploaded like this:
$pathToImages = "path/to/images"
$pathToThumbs = "path/to/thumbs"
$fname = "image-file-name";
$new_fname = "thumb-file-name";
$img = imagecreatefromjpeg( "{$pathToImages}{$fname}" );
$width = imagesx( $img );
$height = imagesy( $img );
$thumbWidth = //someValue//;
$thumbHeight = //someValue//;
// calculate thumbnail size
$new_height = floor($height * ($thumbWidth/$width));
$new_width = $thumbWidth;
// create a new temporary image
$tmp_img = imagecreatetruecolor($thumbWidth, $thumbHeight);
// copy and resize old image into new image
imagecopyresized( $tmp_img, $img, 0, 0, 0, 0, $new_width,$new_height, $width, $height );
// save thumbnail into a file
imagejpeg( $tmp_img, "{$pathToThumbs}{$new_fname}" );