https://www.php.net/manual/fr/function.pclose.php
PHP: pclose - Manual
Ferme un processus de pointeur de fichier
phpmanual
https://manpages.ubuntu.com/manpages/xenial/man3/popen.3.html
Ubuntu Manpage: popen, pclose - pipe stream to or from a process
pipe stream to or from a process
ubuntumanpagepopenpipe