Cannot get new image size PHP - php

Question

I am trying to get filesize of images from a specific folder AFTER and BEFORE they are optimized.
I get same size for $imgsize as well as $newsize even though the latter appears AFTER they images are optimized. What i actually want is that it gets me the NEW size, not the old!
$array has the list of URLs for images (absolute URLs, belongs to another server)
(also let me know, is this fine that i'm replacing the same image after optimizing size in this part $optimized_image= compress_image($path, $path, 50); ) ?
Here is my code:
$f_path='newfolder';
foreach ($array as $imglink)
{
$image = file_get_contents($imglink);
$path= $f_path . "/" . basename($imglink);
$new_image=file_put_contents($path , $image);
$imgsize = filesize($path);
$optimized_image= compress_image($path, $path, 50);
$newsize = filesize($path);
$percentage = ($imgsize / $newsize)*100;
echo $imgsize . "<br/>"; //this size appears fine
echo $newsize; //gives same size as above, no change!
}
And here is the function i'm using for compressing image (which seem to work perfectly fine to me)
function compress_image($src, $dest , $quality)
{
$info = getimagesize($src);
if ($info['mime'] == 'image/jpeg')
{
$image = imagecreatefromjpeg($src);
}
elseif ($info['mime'] == 'image/gif')
{
$image = imagecreatefromgif($src);
}
elseif ($info['mime'] == 'image/png')
{
$image = imagecreatefrompng($src);
}
else
{
die('uknown format');
}
imagejpeg($image, $dest, $quality);
}

Answer 1

Thanks to #u_mulder for the answer. The clearstatcache worked perfectly and solved the problem! :) This is because it deletes the old variable data.