diff --git a/Dockerfiles/web-apache-mysql/alpine/conf/etc/php84/php-fpm.d/zabbix.conf b/Dockerfiles/web-apache-mysql/alpine/conf/etc/php84/php-fpm.d/zabbix.conf
index 66c3c1252..4ee70ccd0 100644
--- a/Dockerfiles/web-apache-mysql/alpine/conf/etc/php84/php-fpm.d/zabbix.conf
+++ b/Dockerfiles/web-apache-mysql/alpine/conf/etc/php84/php-fpm.d/zabbix.conf
@@ -34,3 +34,6 @@ php_value[date.timezone] = ${PHP_TZ}
 ; PHP-FPM monitoring
 pm.status_path = /status
 ping.path = /ping
+
+; Set the socket equal to DB_SERVER_SOCKET set by user
+php_value[mysqli.default_socket] = ${DB_SERVER_SOCKET}
diff --git a/Dockerfiles/web-apache-mysql/alpine/docker-entrypoint.sh b/Dockerfiles/web-apache-mysql/alpine/docker-entrypoint.sh
index fdc75a274..3d76eac9b 100755
--- a/Dockerfiles/web-apache-mysql/alpine/docker-entrypoint.sh
+++ b/Dockerfiles/web-apache-mysql/alpine/docker-entrypoint.sh
@@ -87,12 +87,14 @@ file_process_from_env() {
 
 # Check prerequisites for MySQL database
 check_variables() {
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        : ${DB_SERVER_HOST:="mysql-server"}
-    else
+    if [ -n "${DB_SERVER_SOCKET}" ]; then
+        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
         DB_SERVER_HOST="localhost"
+    else
+        : ${DB_SERVER_HOST:="mysql-server"}
+        : ${DB_SERVER_PORT:="3306"}
+        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
     fi
-    : ${DB_SERVER_PORT:="3306"}
 
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
@@ -102,11 +104,6 @@ check_variables() {
 
     DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
 
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
-    else
-        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
-    fi
 }
 
 db_tls_params() {
@@ -240,8 +237,9 @@ prepare_zbx_php_config() {
     export PHP_TZ=${PHP_TZ}
 
     export DB_SERVER_TYPE="MYSQL"
-    export DB_SERVER_HOST=${DB_SERVER_HOST}
-    export DB_SERVER_PORT=${DB_SERVER_PORT}
+    test -z "${DB_SERVER_HOST}" || export DB_SERVER_HOST
+    test -z "${DB_SERVER_PORT}" || export DB_SERVER_PORT
+    test -z "${DB_SERVER_SOCKET}" || export DB_SERVER_SOCKET
     export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
     export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
     export DB_SERVER_USER=${DB_SERVER_ZBX_USER}
diff --git a/Dockerfiles/web-apache-mysql/centos/conf/etc/php-fpm.d/zabbix.conf b/Dockerfiles/web-apache-mysql/centos/conf/etc/php-fpm.d/zabbix.conf
index 66c3c1252..4ee70ccd0 100644
--- a/Dockerfiles/web-apache-mysql/centos/conf/etc/php-fpm.d/zabbix.conf
+++ b/Dockerfiles/web-apache-mysql/centos/conf/etc/php-fpm.d/zabbix.conf
@@ -34,3 +34,6 @@ php_value[date.timezone] = ${PHP_TZ}
 ; PHP-FPM monitoring
 pm.status_path = /status
 ping.path = /ping
+
+; Set the socket equal to DB_SERVER_SOCKET set by user
+php_value[mysqli.default_socket] = ${DB_SERVER_SOCKET}
diff --git a/Dockerfiles/web-apache-mysql/centos/docker-entrypoint.sh b/Dockerfiles/web-apache-mysql/centos/docker-entrypoint.sh
index 140f149b2..99354d6dc 100755
--- a/Dockerfiles/web-apache-mysql/centos/docker-entrypoint.sh
+++ b/Dockerfiles/web-apache-mysql/centos/docker-entrypoint.sh
@@ -87,12 +87,14 @@ file_process_from_env() {
 
 # Check prerequisites for MySQL database
 check_variables() {
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        : ${DB_SERVER_HOST:="mysql-server"}
-    else
+    if [ -n "${DB_SERVER_SOCKET}" ]; then
+        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
         DB_SERVER_HOST="localhost"
+    else
+        : ${DB_SERVER_HOST:="mysql-server"}
+        : ${DB_SERVER_PORT:="3306"}
+        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
     fi
-    : ${DB_SERVER_PORT:="3306"}
 
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
@@ -102,11 +104,6 @@ check_variables() {
 
     DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
 
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
-    else
-        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
-    fi
 }
 
 db_tls_params() {
@@ -240,8 +237,9 @@ prepare_zbx_php_config() {
     export PHP_TZ=${PHP_TZ}
 
     export DB_SERVER_TYPE="MYSQL"
-    export DB_SERVER_HOST=${DB_SERVER_HOST}
-    export DB_SERVER_PORT=${DB_SERVER_PORT}
+    test -z "${DB_SERVER_HOST}" || export DB_SERVER_HOST
+    test -z "${DB_SERVER_PORT}" || export DB_SERVER_PORT
+    test -z "${DB_SERVER_SOCKET}" || export DB_SERVER_SOCKET
     export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
     export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
     export DB_SERVER_USER=${DB_SERVER_ZBX_USER}
diff --git a/Dockerfiles/web-apache-mysql/ol/conf/etc/php-fpm.d/zabbix.conf b/Dockerfiles/web-apache-mysql/ol/conf/etc/php-fpm.d/zabbix.conf
index 66c3c1252..4ee70ccd0 100644
--- a/Dockerfiles/web-apache-mysql/ol/conf/etc/php-fpm.d/zabbix.conf
+++ b/Dockerfiles/web-apache-mysql/ol/conf/etc/php-fpm.d/zabbix.conf
@@ -34,3 +34,6 @@ php_value[date.timezone] = ${PHP_TZ}
 ; PHP-FPM monitoring
 pm.status_path = /status
 ping.path = /ping
+
+; Set the socket equal to DB_SERVER_SOCKET set by user
+php_value[mysqli.default_socket] = ${DB_SERVER_SOCKET}
diff --git a/Dockerfiles/web-apache-mysql/ol/docker-entrypoint.sh b/Dockerfiles/web-apache-mysql/ol/docker-entrypoint.sh
index 140f149b2..99354d6dc 100755
--- a/Dockerfiles/web-apache-mysql/ol/docker-entrypoint.sh
+++ b/Dockerfiles/web-apache-mysql/ol/docker-entrypoint.sh
@@ -87,12 +87,14 @@ file_process_from_env() {
 
 # Check prerequisites for MySQL database
 check_variables() {
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        : ${DB_SERVER_HOST:="mysql-server"}
-    else
+    if [ -n "${DB_SERVER_SOCKET}" ]; then
+        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
         DB_SERVER_HOST="localhost"
+    else
+        : ${DB_SERVER_HOST:="mysql-server"}
+        : ${DB_SERVER_PORT:="3306"}
+        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
     fi
-    : ${DB_SERVER_PORT:="3306"}
 
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
@@ -102,11 +104,6 @@ check_variables() {
 
     DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
 
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
-    else
-        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
-    fi
 }
 
 db_tls_params() {
@@ -240,8 +237,9 @@ prepare_zbx_php_config() {
     export PHP_TZ=${PHP_TZ}
 
     export DB_SERVER_TYPE="MYSQL"
-    export DB_SERVER_HOST=${DB_SERVER_HOST}
-    export DB_SERVER_PORT=${DB_SERVER_PORT}
+    test -z "${DB_SERVER_HOST}" || export DB_SERVER_HOST
+    test -z "${DB_SERVER_PORT}" || export DB_SERVER_PORT
+    test -z "${DB_SERVER_SOCKET}" || export DB_SERVER_SOCKET
     export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
     export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
     export DB_SERVER_USER=${DB_SERVER_ZBX_USER}
diff --git a/Dockerfiles/web-apache-mysql/ubuntu/conf/etc/php/8.3/fpm/pool.d/zabbix.conf b/Dockerfiles/web-apache-mysql/ubuntu/conf/etc/php/8.3/fpm/pool.d/zabbix.conf
index 66c3c1252..4ee70ccd0 100644
--- a/Dockerfiles/web-apache-mysql/ubuntu/conf/etc/php/8.3/fpm/pool.d/zabbix.conf
+++ b/Dockerfiles/web-apache-mysql/ubuntu/conf/etc/php/8.3/fpm/pool.d/zabbix.conf
@@ -34,3 +34,6 @@ php_value[date.timezone] = ${PHP_TZ}
 ; PHP-FPM monitoring
 pm.status_path = /status
 ping.path = /ping
+
+; Set the socket equal to DB_SERVER_SOCKET set by user
+php_value[mysqli.default_socket] = ${DB_SERVER_SOCKET}
diff --git a/Dockerfiles/web-apache-mysql/ubuntu/docker-entrypoint.sh b/Dockerfiles/web-apache-mysql/ubuntu/docker-entrypoint.sh
index c8ca94545..d1686736d 100755
--- a/Dockerfiles/web-apache-mysql/ubuntu/docker-entrypoint.sh
+++ b/Dockerfiles/web-apache-mysql/ubuntu/docker-entrypoint.sh
@@ -87,12 +87,14 @@ file_process_from_env() {
 
 # Check prerequisites for MySQL database
 check_variables() {
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        : ${DB_SERVER_HOST:="mysql-server"}
-    else
+    if [ -n "${DB_SERVER_SOCKET}" ]; then
+        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
         DB_SERVER_HOST="localhost"
+    else
+        : ${DB_SERVER_HOST:="mysql-server"}
+        : ${DB_SERVER_PORT:="3306"}
+        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
     fi
-    : ${DB_SERVER_PORT:="3306"}
 
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
@@ -102,11 +104,6 @@ check_variables() {
 
     DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
 
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
-    else
-        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
-    fi
 }
 
 db_tls_params() {
@@ -240,8 +237,9 @@ prepare_zbx_php_config() {
     export PHP_TZ=${PHP_TZ}
 
     export DB_SERVER_TYPE="MYSQL"
-    export DB_SERVER_HOST=${DB_SERVER_HOST}
-    export DB_SERVER_PORT=${DB_SERVER_PORT}
+    test -z "${DB_SERVER_HOST}" || export DB_SERVER_HOST
+    test -z "${DB_SERVER_PORT}" || export DB_SERVER_PORT
+    test -z "${DB_SERVER_SOCKET}" || export DB_SERVER_SOCKET
     export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
     export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
     export DB_SERVER_USER=${DB_SERVER_ZBX_USER}
diff --git a/Dockerfiles/web-nginx-mysql/alpine/conf/etc/php84/php-fpm.d/zabbix.conf b/Dockerfiles/web-nginx-mysql/alpine/conf/etc/php84/php-fpm.d/zabbix.conf
index 66c3c1252..4ee70ccd0 100644
--- a/Dockerfiles/web-nginx-mysql/alpine/conf/etc/php84/php-fpm.d/zabbix.conf
+++ b/Dockerfiles/web-nginx-mysql/alpine/conf/etc/php84/php-fpm.d/zabbix.conf
@@ -34,3 +34,6 @@ php_value[date.timezone] = ${PHP_TZ}
 ; PHP-FPM monitoring
 pm.status_path = /status
 ping.path = /ping
+
+; Set the socket equal to DB_SERVER_SOCKET set by user
+php_value[mysqli.default_socket] = ${DB_SERVER_SOCKET}
diff --git a/Dockerfiles/web-nginx-mysql/alpine/docker-entrypoint.sh b/Dockerfiles/web-nginx-mysql/alpine/docker-entrypoint.sh
index 4a8e1628d..b1adc188e 100755
--- a/Dockerfiles/web-nginx-mysql/alpine/docker-entrypoint.sh
+++ b/Dockerfiles/web-nginx-mysql/alpine/docker-entrypoint.sh
@@ -93,12 +93,14 @@ file_process_from_env() {
 
 # Check prerequisites for MySQL database
 check_variables() {
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        : ${DB_SERVER_HOST:="mysql-server"}
-    else
+    if [ -n "${DB_SERVER_SOCKET}" ]; then
+        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
         DB_SERVER_HOST="localhost"
+    else
+        : ${DB_SERVER_HOST:="mysql-server"}
+        : ${DB_SERVER_PORT:="3306"}
+        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
     fi
-    : ${DB_SERVER_PORT:="3306"}
 
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
@@ -108,11 +110,6 @@ check_variables() {
 
     DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
 
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
-    else
-        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
-    fi
 }
 
 db_tls_params() {
@@ -291,8 +288,9 @@ prepare_zbx_php_config() {
     export PHP_TZ=${PHP_TZ}
 
     export DB_SERVER_TYPE="MYSQL"
-    export DB_SERVER_HOST=${DB_SERVER_HOST}
-    export DB_SERVER_PORT=${DB_SERVER_PORT}
+    test -z "${DB_SERVER_HOST}" || export DB_SERVER_HOST
+    test -z "${DB_SERVER_PORT}" || export DB_SERVER_PORT
+    test -z "${DB_SERVER_SOCKET}" || export DB_SERVER_SOCKET
     export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
     export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
     export DB_SERVER_USER=${DB_SERVER_ZBX_USER}
diff --git a/Dockerfiles/web-nginx-mysql/centos/conf/etc/php-fpm.d/zabbix.conf b/Dockerfiles/web-nginx-mysql/centos/conf/etc/php-fpm.d/zabbix.conf
index 66c3c1252..4ee70ccd0 100644
--- a/Dockerfiles/web-nginx-mysql/centos/conf/etc/php-fpm.d/zabbix.conf
+++ b/Dockerfiles/web-nginx-mysql/centos/conf/etc/php-fpm.d/zabbix.conf
@@ -34,3 +34,6 @@ php_value[date.timezone] = ${PHP_TZ}
 ; PHP-FPM monitoring
 pm.status_path = /status
 ping.path = /ping
+
+; Set the socket equal to DB_SERVER_SOCKET set by user
+php_value[mysqli.default_socket] = ${DB_SERVER_SOCKET}
diff --git a/Dockerfiles/web-nginx-mysql/centos/docker-entrypoint.sh b/Dockerfiles/web-nginx-mysql/centos/docker-entrypoint.sh
index c570461eb..0b7b83612 100755
--- a/Dockerfiles/web-nginx-mysql/centos/docker-entrypoint.sh
+++ b/Dockerfiles/web-nginx-mysql/centos/docker-entrypoint.sh
@@ -93,12 +93,14 @@ file_process_from_env() {
 
 # Check prerequisites for MySQL database
 check_variables() {
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        : ${DB_SERVER_HOST:="mysql-server"}
-    else
+    if [ -n "${DB_SERVER_SOCKET}" ]; then
+        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
         DB_SERVER_HOST="localhost"
+    else
+        : ${DB_SERVER_HOST:="mysql-server"}
+        : ${DB_SERVER_PORT:="3306"}
+        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
     fi
-    : ${DB_SERVER_PORT:="3306"}
 
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
@@ -108,11 +110,6 @@ check_variables() {
 
     DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
 
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
-    else
-        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
-    fi
 }
 
 db_tls_params() {
@@ -291,8 +288,9 @@ prepare_zbx_php_config() {
     export PHP_TZ=${PHP_TZ}
 
     export DB_SERVER_TYPE="MYSQL"
-    export DB_SERVER_HOST=${DB_SERVER_HOST}
-    export DB_SERVER_PORT=${DB_SERVER_PORT}
+    test -z "${DB_SERVER_HOST}" || export DB_SERVER_HOST
+    test -z "${DB_SERVER_PORT}" || export DB_SERVER_PORT
+    test -z "${DB_SERVER_SOCKET}" || export DB_SERVER_SOCKET
     export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
     export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
     export DB_SERVER_USER=${DB_SERVER_ZBX_USER}
diff --git a/Dockerfiles/web-nginx-mysql/ol/conf/etc/php-fpm.d/zabbix.conf b/Dockerfiles/web-nginx-mysql/ol/conf/etc/php-fpm.d/zabbix.conf
index 66c3c1252..4ee70ccd0 100644
--- a/Dockerfiles/web-nginx-mysql/ol/conf/etc/php-fpm.d/zabbix.conf
+++ b/Dockerfiles/web-nginx-mysql/ol/conf/etc/php-fpm.d/zabbix.conf
@@ -34,3 +34,6 @@ php_value[date.timezone] = ${PHP_TZ}
 ; PHP-FPM monitoring
 pm.status_path = /status
 ping.path = /ping
+
+; Set the socket equal to DB_SERVER_SOCKET set by user
+php_value[mysqli.default_socket] = ${DB_SERVER_SOCKET}
diff --git a/Dockerfiles/web-nginx-mysql/ol/docker-entrypoint.sh b/Dockerfiles/web-nginx-mysql/ol/docker-entrypoint.sh
index c570461eb..0b7b83612 100755
--- a/Dockerfiles/web-nginx-mysql/ol/docker-entrypoint.sh
+++ b/Dockerfiles/web-nginx-mysql/ol/docker-entrypoint.sh
@@ -93,12 +93,14 @@ file_process_from_env() {
 
 # Check prerequisites for MySQL database
 check_variables() {
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        : ${DB_SERVER_HOST:="mysql-server"}
-    else
+    if [ -n "${DB_SERVER_SOCKET}" ]; then
+        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
         DB_SERVER_HOST="localhost"
+    else
+        : ${DB_SERVER_HOST:="mysql-server"}
+        : ${DB_SERVER_PORT:="3306"}
+        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
     fi
-    : ${DB_SERVER_PORT:="3306"}
 
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
@@ -108,11 +110,6 @@ check_variables() {
 
     DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
 
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
-    else
-        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
-    fi
 }
 
 db_tls_params() {
@@ -291,8 +288,9 @@ prepare_zbx_php_config() {
     export PHP_TZ=${PHP_TZ}
 
     export DB_SERVER_TYPE="MYSQL"
-    export DB_SERVER_HOST=${DB_SERVER_HOST}
-    export DB_SERVER_PORT=${DB_SERVER_PORT}
+    test -z "${DB_SERVER_HOST}" || export DB_SERVER_HOST
+    test -z "${DB_SERVER_PORT}" || export DB_SERVER_PORT
+    test -z "${DB_SERVER_SOCKET}" || export DB_SERVER_SOCKET
     export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
     export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
     export DB_SERVER_USER=${DB_SERVER_ZBX_USER}
diff --git a/Dockerfiles/web-nginx-mysql/rhel/conf/etc/php-fpm.d/zabbix.conf b/Dockerfiles/web-nginx-mysql/rhel/conf/etc/php-fpm.d/zabbix.conf
index 66c3c1252..4ee70ccd0 100644
--- a/Dockerfiles/web-nginx-mysql/rhel/conf/etc/php-fpm.d/zabbix.conf
+++ b/Dockerfiles/web-nginx-mysql/rhel/conf/etc/php-fpm.d/zabbix.conf
@@ -34,3 +34,6 @@ php_value[date.timezone] = ${PHP_TZ}
 ; PHP-FPM monitoring
 pm.status_path = /status
 ping.path = /ping
+
+; Set the socket equal to DB_SERVER_SOCKET set by user
+php_value[mysqli.default_socket] = ${DB_SERVER_SOCKET}
diff --git a/Dockerfiles/web-nginx-mysql/rhel/docker-entrypoint.sh b/Dockerfiles/web-nginx-mysql/rhel/docker-entrypoint.sh
index c570461eb..0b7b83612 100755
--- a/Dockerfiles/web-nginx-mysql/rhel/docker-entrypoint.sh
+++ b/Dockerfiles/web-nginx-mysql/rhel/docker-entrypoint.sh
@@ -93,12 +93,14 @@ file_process_from_env() {
 
 # Check prerequisites for MySQL database
 check_variables() {
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        : ${DB_SERVER_HOST:="mysql-server"}
-    else
+    if [ -n "${DB_SERVER_SOCKET}" ]; then
+        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
         DB_SERVER_HOST="localhost"
+    else
+        : ${DB_SERVER_HOST:="mysql-server"}
+        : ${DB_SERVER_PORT:="3306"}
+        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
     fi
-    : ${DB_SERVER_PORT:="3306"}
 
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
@@ -108,11 +110,6 @@ check_variables() {
 
     DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
 
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
-    else
-        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
-    fi
 }
 
 db_tls_params() {
@@ -291,8 +288,9 @@ prepare_zbx_php_config() {
     export PHP_TZ=${PHP_TZ}
 
     export DB_SERVER_TYPE="MYSQL"
-    export DB_SERVER_HOST=${DB_SERVER_HOST}
-    export DB_SERVER_PORT=${DB_SERVER_PORT}
+    test -z "${DB_SERVER_HOST}" || export DB_SERVER_HOST
+    test -z "${DB_SERVER_PORT}" || export DB_SERVER_PORT
+    test -z "${DB_SERVER_SOCKET}" || export DB_SERVER_SOCKET
     export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
     export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
     export DB_SERVER_USER=${DB_SERVER_ZBX_USER}
diff --git a/Dockerfiles/web-nginx-mysql/ubuntu/conf/etc/php/8.3/fpm/pool.d/zabbix.conf b/Dockerfiles/web-nginx-mysql/ubuntu/conf/etc/php/8.3/fpm/pool.d/zabbix.conf
index 66c3c1252..4ee70ccd0 100644
--- a/Dockerfiles/web-nginx-mysql/ubuntu/conf/etc/php/8.3/fpm/pool.d/zabbix.conf
+++ b/Dockerfiles/web-nginx-mysql/ubuntu/conf/etc/php/8.3/fpm/pool.d/zabbix.conf
@@ -34,3 +34,6 @@ php_value[date.timezone] = ${PHP_TZ}
 ; PHP-FPM monitoring
 pm.status_path = /status
 ping.path = /ping
+
+; Set the socket equal to DB_SERVER_SOCKET set by user
+php_value[mysqli.default_socket] = ${DB_SERVER_SOCKET}
diff --git a/Dockerfiles/web-nginx-mysql/ubuntu/docker-entrypoint.sh b/Dockerfiles/web-nginx-mysql/ubuntu/docker-entrypoint.sh
index 5e36d87d1..2878d9e3c 100755
--- a/Dockerfiles/web-nginx-mysql/ubuntu/docker-entrypoint.sh
+++ b/Dockerfiles/web-nginx-mysql/ubuntu/docker-entrypoint.sh
@@ -93,12 +93,14 @@ file_process_from_env() {
 
 # Check prerequisites for MySQL database
 check_variables() {
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        : ${DB_SERVER_HOST:="mysql-server"}
-    else
+    if [ -n "${DB_SERVER_SOCKET}" ]; then
+        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
         DB_SERVER_HOST="localhost"
+    else
+        : ${DB_SERVER_HOST:="mysql-server"}
+        : ${DB_SERVER_PORT:="3306"}
+        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
     fi
-    : ${DB_SERVER_PORT:="3306"}
 
     file_env MYSQL_USER
     file_env MYSQL_PASSWORD
@@ -108,11 +110,6 @@ check_variables() {
 
     DB_SERVER_DBNAME=${MYSQL_DATABASE:-"zabbix"}
 
-    if [ ! -n "${DB_SERVER_SOCKET}" ]; then
-        mysql_connect_args="-h ${DB_SERVER_HOST} -P ${DB_SERVER_PORT}"
-    else
-        mysql_connect_args="-S ${DB_SERVER_SOCKET}"
-    fi
 }
 
 db_tls_params() {
@@ -291,8 +288,9 @@ prepare_zbx_php_config() {
     export PHP_TZ=${PHP_TZ}
 
     export DB_SERVER_TYPE="MYSQL"
-    export DB_SERVER_HOST=${DB_SERVER_HOST}
-    export DB_SERVER_PORT=${DB_SERVER_PORT}
+    test -z "${DB_SERVER_HOST}" || export DB_SERVER_HOST
+    test -z "${DB_SERVER_PORT}" || export DB_SERVER_PORT
+    test -z "${DB_SERVER_SOCKET}" || export DB_SERVER_SOCKET
     export DB_SERVER_DBNAME=${DB_SERVER_DBNAME}
     export DB_SERVER_SCHEMA=${DB_SERVER_SCHEMA}
     export DB_SERVER_USER=${DB_SERVER_ZBX_USER}