The Yii2 project with MySQL database was successfully deployed on the hosting platform http://wscb.online.
While there were no issues with images on the local OpenServer, after uploading to the hosting, only empty frames are displayed instead of the actual pictures.

I have verified that the image files are present and have re-uploaded them, ensuring the files are received. The database even accepts new images, but the problem lies in displaying them on the browser.

In developer mode, I attempted a temporary solution by manually adding the image file path (by appending it to the /web path), which resulted in immediate image display. However, the question remains why the same project, when uploaded back to the local OpenServer, shows the pictures correctly on the pages, despite encountering invisible photos on the hosting. This inconsistency is puzzling, especially considering that the project remains unchanged.

If you click on any link to an image that hasn't loaded (these can be easily found in the browser console, they show up as GET 404 not found with red text) - take note that Yii2 engine will display an error saying "Page not found." This indicates that the http server configuration (most likely on Apache hosting) is not properly set up and is redirecting all requests to index.php in the web folder.

In the public_html directory, you should have a .htaccess file set up like this:

<IfModule mod_rewrite.c>
    Options +FollowSymlinks
    Rewrite Engine On
</IfModule>

<IfModule mod_rewrite.c>
    RewriteCond %{HTTP:X-Forwarded-Proto} !https
    RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301,NE]

    RewriteCond %{REQUEST_URI} ^/.*
    RewriteRule ^(.*)$ web/$1 [L]
   
    RewriteCond %{REQUEST_URI} !^/web/
    RewriteCond %{REQUEST_FILENAME} !-f [OR]
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^.*$ web/index.php
</IfModule>
It might be sufficient to place the .htaccess file with the content above in the web folder:

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php
This will help ensure that the server properly handles requests and redirects them to the correct location.

It seems that your web server configuration is incorrect. Instead of having the web folder specified as the root, you have the folder above it. If you are using nginx, the correct configuration should be:

root /var/www/html/web;

As a result, the project remains the same, but the accessibility of the images is different.

It's important to ensure that the web folder is set as the root directory in order for the server to properly handle requests and serve the content of your website. This will ensure that all files, including the images, are accessible in the intended way.

The problem you're experiencing with the image display on the hosting platform is likely due to a few key factors:

1. File Paths and Permissions:
  - Ensure that the image files are uploaded to the correct directory within your Yii2 project on the hosting platform. By default, Yii2 expects the images to be located in the `/web` directory, or a subdirectory within it (e.g., `/web/images`).
  - Check the file permissions on the image files and directories. On a typical Linux-based hosting environment, the files should have permissions of 644 (read-write-execute for owner, read-only for group and others), and the directories should have permissions of 755 (read-write-execute for owner, read-execute for group and others).
  - Verify that the file paths used in your Yii2 application to reference the images are correct and match the actual location of the files on the hosting platform.

2. Web Server Configuration:
  - Ensure that the web server configuration on the hosting platform is properly set up to serve the assets (images) from the correct location.
  - Check the document root setting in the web server configuration. This should point to the `/web` directory of your Yii2 project, or a directory that contains the images.
  - Review any virtual host settings or URL rewriting rules (e.g., Apache's `.htaccess` file) to ensure they are not interfering with the proper serving of the image files.
  - Verify that the web server has the necessary permissions to access and serve the image files.

3. Yii2 Asset Management:
  - Yii2 provides a powerful asset management system that can help with serving static assets, including images, in a consistent and efficient manner.
  - Consider using the `AssetManager` component in your Yii2 application to manage and publish the image assets. This involves registering the image assets as part of an asset bundle, which can then be included in your views.
  - The `AssetManager` component can handle tasks such as asset compression, caching, and serving the assets from the correct location, ensuring consistent behavior across different environments.

4. Fallback Mechanism:
  - Implement a fallback mechanism in your Yii2 application to handle cases where the images are not available or cannot be displayed correctly.
  - This could involve displaying a default image or a placeholder until the actual image is successfully loaded.
  - You can achieve this by using conditional logic in your views to check the availability of the image and provide an alternative option.

5. Caching Issues:
  - Ensure that there are no caching issues on the hosting platform that might be causing the images to not display correctly.
  - Clear any caches (browser, CDN, server-side caches) and try accessing the images from different browsers or devices to verify that the issue is not related to caching.
  - Consider implementing cache-busting techniques, such as appending a timestamp or a unique query parameter to the image URLs, to prevent caching issues.

6. Hosting Provider Support:
  - If you've exhausted the above steps and the issue persists, reach out to the hosting provider's support team for further assistance.
  - Provide them with detailed information about your project, the steps you've taken to troubleshoot the issue, and any relevant logs or error messages.
  - The hosting provider may be able to provide more insights into the specific configuration of their hosting environment and help you identify and resolve the problem.

By following these detailed steps, you should be able to pinpoint the root cause of the image display issue and implement a suitable solution to ensure consistent behavior across your local and hosting environments.