FFmpeg works on CMD but gives error with PHP exec()

Question

When i run ffmpeg on cmd it works good, i put export LD_LIBRARY_PATH=/usr/local/lib into /etc/profile.d because it couldn't fine libmp3lame at the first

But when i run it with PHP exec() it still gives /usr/local/bin/ffmpeg: error while loading shared libraries: libmp3lame.so.0: cannot open shared object file: No such file or directory

$exec_string = '/usr/local/bin/ffmpeg -version 2>&1';
echo exec($exec_string);

Why it works on cmd but not on php exec() ?

Answer 1

Figured. Here is the solution

putenv("LD_LIBRARY_PATH=/usr/local/lib");