Initalize Opcache File Cache

#!/bin/bash

# NOTE
# Opcache's file cache settings in /etc/php.d/opcache.ini:
# opcache.file_cache=/dev/shm/opcache
# opcache.file_cache_only=1

# Stop php-fpm
ps aux | grep -q "[p]hp-fpm"
if [ "$?" -eq "0" ]; then
	/usr/bin/systemctl stop php-fpm
fi

# Remove existing cache dir
if [ -d "/dev/shm/opcache" ]; then
	/bin/rm -rf /dev/shm/opcache
fi

# Create a new writable cache dir
mkdir /dev/shm/opcache
chmod 1777 /dev/shm/opcache

# Start php-fpm
/usr/bin/systemctl start php-fpm

# Visit a php script to trigger file caching & creation of the hashed dir
/usr/bin/curl -s 'https://domain1.com/any-script.php' > /dev/null 2>&1

# Get the name of the hashed dir
hashed_dir=$(ls -1 /dev/shm/opcache)

# Make the hashed dir writable by all users
if [[ -n "$hashed_dir" && -d "/dev/shm/opcache/$hashed_dir" ]]; then
	chmod 1777 /dev/shm/opcache/$hashed_dir
	chown root:root /dev/shm/opcache/$hashed_dir
fi

# Make the home subdir writable by all users
if [ -d "/dev/shm/opcache/$hashed_dir/home" ]; then
	chmod 1777 /dev/shm/opcache/$hashed_dir/home
	chown root:root /dev/shm/opcache/$hashed_dir/home
fi