PHP - Problem in saving the image using imagepng

Probably you are familiar with the code below.

I am assuming that you successfully prints the image 

and only having a problem in saving it.

This code will do the solution!

Tested and working! 

header( "Content-type: image/png" );


 
// this will print your image 
imagepng($img);
 
// set where you want your image to be saved 
// take note that you have to save the image 
// into another directory for this to work. 
$filename = "any_name"; 
$directory = "folder/".$filename.".png";
 
// set the directory with 0755 permission
chmod($directory,0755);
 
// this will save your image 
imagepng($img, $directory, 0, NULL);
 
 
imagedestroy($img);