I’m encountering an issue where error messages in my CodeIgniter 3 application are displaying differently between my local development environment and my server environment where Docker is being used.

In my local environment (Windows host), when I encounter a validation error, such as a required field not being filled in, the error message includes the variable name, like “The Username field is required.”

However, when I deploy the same application to my server environment (Ubuntu host with Docker), the error message does not include the variable name; instead, it just says “The field is required.”

Both environments are running PHP 8.3, and I’ve ensured that the CodeIgniter version is the same (3.x). I’ve checked the PHP error reporting settings, and they seem to be consistent between environments.

my docker composer file

version: '3'
services:
    db:
        build:
            context: .
            dockerfile: docker/mysql/Dockerfile
        restart: always
        environment:
            MARIADB_ROOT_PASSWORD: ${MARIADB_ROOT_PASSWORD}
            MARIADB_DATABASE: ${MARIADB_DATABASE}

        volumes:
            - ./db_data:/usr/data
        ports:
            - "3309:3306"
    web:
        build:
            context: .
            dockerfile: docker/apache/Dockerfile
        restart: unless-stopped
        volumes:
            - .:/var/www/html
            - ./apache_log:/var/log/apache2
       
        ports:
            - 84:80
        depends_on:
            - db
        links:
            - db
    adminer:
        image: adminer
        restart: unless-stopped
        ports:
            - 8084:8080

my docker file

# use php 8.3 apache image
FROM php:8.3-apache
# Update it
RUN apt-get update

# install necessary libraries
RUN apt-get install -y 
    git 
    zip 
    curl 
    sudo 
    unzip 
    libicu-dev 
    libbz2-dev 
    libpng-dev 
    libjpeg-dev 
    libmcrypt-dev 
    libreadline-dev 
    libfreetype6-dev 
    g++

# install docker extensions
RUN docker-php-ext-install 
    bz2 
    intl 
    bcmath 
    opcache 
    calendar 
    pdo_mysql 
    mysqli

# set up document root for apache
COPY docker/apache/000-default.conf /etc/apache2/sites-available/000-default.conf

# mod_rewrite for URL rewrite and mod_headers for .htaccess extra headers like Access-Control-Allow-Origin-
RUN a2enmod rewrite headers

# start with base php config, then add extensions
RUN mv "$PHP_INI_DIR/php.ini-development" "$PHP_INI_DIR/php.ini"

# composer
RUN curl -sS https://getcomposer.org/installer | php
RUN mv composer.phar /usr/local/bin/composer
RUN chmod +x /usr/local/bin/composer
RUN composer self-update

COPY . /var/www/html/

RUN chown -R www-data:www-data /var/www/html && 
    chmod -R 755 /var/www/html

EXPOSE 80

I examined the config.php and database.php files in my CodeIgniter application to see if there are any environment-specific configurations that could affect error message formatting. However, I couldn’t find anything