https://bugs.php.net/bug.php?id=46180&edit=1
PHP :: Bug #46180 :: memory leak on unset(array)
memory leakphpbugunsetarray
https://eol.jsc.nasa.gov/SearchPhotos/photo.pl?mission=ISS041&roll=E&frame=46180
Astronaut Photo ISS041-E-46180 CHILE
astronautphotoe