diff --git a/zabbixinstall b/zabbixinstall
index 75e5417..6f44e3b 100755
--- a/zabbixinstall
+++ b/zabbixinstall
@@ -10,10 +10,33 @@
 #
 if [[ $(id -u) -ne 0 ]]; then echo "" && echo "Must be root or use sudo" && echo "" ; exit 1 ; fi
 
+#
+# Get php-fpm version
+#
+phpfpm=$(systemctl list-unit-files --type=service | awk '/php[0-9]+\.[0-9]+-fpm/ {sub(".service",""); print; exit}')
+if [[ -z "$phpfpm" ]]; then printf "\nUnable to detect php-fpm version. Is PHP-FPM installed?\n\n" ; exit 1 ; fi
+
+#
+# Check if required services are running or not
+#
+for svc in nginx mariadb "$phpfpm"; do systemctl is-active --quiet "$svc" || { printf "\n%s is not running, cannot continue...\n\n" "${svc^}" ; exit 1 ; }; done
+
+#
+# Check MariaDB authentication method (socket or not)
+#
+if mysql -u root -e ";" 2>/dev/null; then
+    socket="SOCKET DETECTED — no need for -a or -m"
+    socketusage="SOCKET DETECTED — this flag is not needed"
+    socketauth="yes"
+else
+    socket="NO SOCKET DETECTED — you must use -a and -m"
+    socketusage="NO SOCKET DETECTED — these flags are required"
+    socketauth="no"
+fi
+
 #
 # Define variables and functions
 #
-phpver=$(php -r 'echo PHP_MAJOR_VERSION.".".PHP_MINOR_VERSION;' 2>/dev/null || echo "8.3") ; phpfpm="php$phpver-fpm"
 ubuntuversion="24.04"
 fallbackversion="7.0"
 
@@ -34,38 +57,17 @@ usage () {
     printf -- "  sudo ./zabbixinstall -n zabbix.something.xyz -p zabbixdbpwd -a admin -m adminpwd\n\n"
 }
 
-#
-# Function to check if a service is already running or not
-#
-serviceno () { printf "\n%s" "$service" ; printf " is not running cannot continue...\n\n"; }
-servicedead () { status=$(systemctl is-active "$service"); if [[ "$status" != "active" ]]; then serviceno ; exit 1 ; fi; }
-
 #
 # Function inputcheck
 #
 inputcheck () {
-    [[ -z "$hostname" ]] && { usage; echo ""; echo "Error! Hostname empty."; echo ""; exit 1; }
-    [[ -z "$dbpass"   ]] && { usage; echo ""; echo "Error! Database password empty."; echo ""; exit 1; }
+    [[ -z "$hostname" ]]   && { usage; echo ""; echo "Error! Hostname empty."; echo ""; exit 1; }
+    [[ "$hostname" =~ [[:space:]/] ]] && { echo "ERROR: DOMAIN INVALID (no spaces or slashes allowed)"; exit 1; }
+    [[ -z "$dbname" ]]     && { usage; echo ""; echo "Error! Database name empty."; echo ""; exit 1; }
+    [[ -z "$dbuser" ]]     && { usage; echo ""; echo "Error! Database user empty."; echo ""; exit 1; }
+    [[ -z "$dbpass" ]]     && { usage; echo ""; echo "Error! Database password empty."; echo ""; exit 1; }
 }
 
-#
-# If Nginx and MariaDB is not running then die
-#
-service="mariadb" ; servicedead ; service="nginx" ; servicedead
-
-#
-# Check MariaDB authentication method (socket or not)
-#
-if mysql -u root -e ";" 2>/dev/null; then
-    socket="SOCKET DETECTED — no need for -a or -m"
-    socketusage="SOCKET DETECTED — this flag is not needed"
-    socketauth="yes"
-else
-    socket="NO SOCKET DETECTED — you must use -a and -m"
-    socketusage="NO SOCKET DETECTED — these flags are required"
-    socketauth="no"
-fi
-
 #
 # Let's go
 #
@@ -199,7 +201,7 @@ esac
 #
 cp "$nginxsnippets/hostfiles/zabbix.80.conf" /etc/nginx/conf.d/"$hostname".conf
 sed -i "s/^# DBPassword=.*/DBPassword=$dbpass/" /etc/zabbix/zabbix_server.conf
-sed -i "s/DOMAIN/$hostname/" /etc/nginx/conf.d/"$hostname".conf
+sed -i -- "s/DOMAIN/$hostname/g" /etc/nginx/conf.d/"$hostname".conf
 rm -f /etc/nginx/conf.d/zabbix.conf
 
 #
@@ -207,7 +209,8 @@ rm -f /etc/nginx/conf.d/zabbix.conf
 #
 systemctl enable zabbix-server zabbix-agent
 systemctl restart zabbix-server zabbix-agent
-systemctl restart "$phpfpm" && systemctl restart nginx
+systemctl restart "$phpfpm"
+systemctl restart nginx
 
 #
 # Zabbix postinstall notice