Creating a thumbnail from an image [closed] - php

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I'm trying to create a thumbnail from an image, but it's not working for some reason. What am I doing wrong?
<?php
function make_thumb($src, $dest, $desired_width) {
/* read the source image */
$source_image = imagecreatefromjpeg($src);
$width = imagesx($source_image);
$height = imagesy($source_image);
/* find the "desired height" of this thumbnail, relative to the desired width */
$desired_height = floor($height * ($desired_width / $width));
/* create a new, "virtual" image */
$virtual_image = imagecreatetruecolor($desired_width, $desired_height);
/* copy source image at a resized size */
imagecopyresampled($virtual_image, $source_image, 0, 0, 0, 0, $desired_width, $desired_height, $width, $height);
/* create the physical thumbnail image to its destination */
imagejpeg($virtual_image, $dest);
} //end of function make_thumb($src, $dest, $desired_width)
make_thumb("uploads/643Full-HD-Space-Wallpapers-Widescreen.jpg", "test", 100);
?>

Answer 1

Your function works for me, however, I had to give the destination a jpeg extension for it to be a valid jpeg image:
//---------------------------------------------------------------------vvv
make_thumb("uploads/643Full-HD-Space-Wallpapers-Widescreen.jpg", "test.jpg", 100);
EDIT:
Based on your comment, this would be the full function:
function make_thumb($src, $dest, $desired_width)
{
// Make directory if not made
if(!is_dir($dest))
mkdir($dest,0755,true);
// Get path info
$pInfo = pathinfo($src);
// Save the new path using the current file name
$dest = $dest."/".$pInfo['basename'];
// Do the rest of your stuff and things...
$source_image = imagecreatefromjpeg($src);
$width = imagesx($source_image);
$height = imagesy($source_image);
$desired_height = floor($height * ($desired_width / $width));
$virtual_image = imagecreatetruecolor($desired_width, $desired_height);
imagecopyresampled($virtual_image, $source_image, 0, 0, 0, 0, $desired_width, $desired_height, $width, $height);
imagejpeg($virtual_image, $dest);
}
// Create file here
make_thumb("http://res.cloudinary.com/demo/image/upload/w_250,q_90/happy_dog.jpg", "test", 100);