(PHP 4, PHP 5, PHP 7, PHP 8)
imagedestroy — Destroy an image
Note:
This function has no effect. Prior to PHP 8.0.0, this function was used to close the resource.
   Prior to PHP 8.0.0, imagedestroy() freed any memory associated
   with image image.
  
imageA GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().
   Returns true on success or false on failure.
  
| Version | Description | 
|---|---|
| 8.0.0 | This function is a NOP now. | 
| 8.0.0 | imageexpects a GdImage
  instance now; previously, a validgdresource was expected. | 
Example #1 Using imagedestroy() prior to PHP 8.0.0
<?php
// create a 100 x 100 image
$im = imagecreatetruecolor(100, 100);
// alter or save the image
// frees image from memory
imagedestroy($im);
?>