[need help] masuk yang ngerti php

Warning: exec() has been disabled for security reasons in /home/a4500389/public_html/php/upload.php on line 82

Code:

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82.$frames = exec("identify -format '%n' ". $uploadedfile ."");

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web : http://stevenhalimm.tk/php/

( setelah upload imagenya )

cara benerinnya gmana ya bro biar ga keluar ini lagi?
Warning: exec() has been disabled for security reasons in /home/a4500389/public_html/php/upload.php on line 82

setau gw exec() secara default emang di-disable di hampir semua "shared hosting" krn dinilai terlalu berbahaya.
jd saran gw, jgn pake command exec() kecuali loe make "dedicated server/hosting".

jadi gw delete aja ?
ato ada command buat settingnya?

ya pake command lain aja yg fungsinya sama.
untuk bisa bikin command exec digunain loe hrs merubah setting dgn login admin dr hosting tersebut,
gw cm bisa saranin sebatas ini krn gw bukan php master, :(