Increasing PHP Upload Limits in Docker WordPress

When working with WordPress in Docker, you may need to increase the default file upload size limits. Here are multiple methods to accomplish this:

Method 1: Using Custom php.ini File (Recommended)

This is the cleanest approach that persists through container restarts.

Create a custom PHP configuration file:

mkdir -p ~/websites/custom-php
nano ~/websites/custom-php/custom.ini

Add these configurations to the file:

upload_max_filesize = 64M
post_max_size = 64M
memory_limit = 128M
max_execution_time = 300

Update your docker-compose.yml to mount this file:

website_wordpress:
  image: wordpress:latest
  platform: linux/arm64
  container_name: website_wordpress
  # ... other settings ...
  volumes:
    - ./sites/website/wordpress:/var/www/html
    - ./custom-php/custom.ini:/usr/local/etc/php/conf.d/custom.ini
  # ... rest of configuration ...

Restart your containers:

docker-compose down
docker-compose up -d

Method 2: Using .htaccess File

If you prefer not to modify docker-compose.yml:

Connect to your WordPress container:
```
docker exec -it website_wordpress bash
```
Edit or create the .htaccess file:
```
nano /var/www/html/.htaccess
```

Add these lines:

php_value upload_max_filesize 64M
php_value post_max_size 64M
php_value memory_limit 128M
php_value max_execution_time 300

Exit the container:
```
exit
```

Method 3: Using wp-config.php

Another approach is to add these settings to wp-config.php:

Connect to your WordPress container:
```
docker exec -it website_wordpress bash
```
Edit wp-config.php:
```
nano /var/www/html/wp-config.php
```

Add these lines before "That's all, stop editing!":

/* Increase upload limits */
@ini_set('upload_max_filesize', '64M');
@ini_set('post_max_size', '64M');
@ini_set('memory_limit', '128M');
@ini_set('max_execution_time', '300');

Exit the container:
```
exit
```

Verify Your Changes

To confirm the new settings are applied:

Create a temporary PHP info file:

docker exec -it website_wordpress bash -c "echo '<?php phpinfo(); ?>' > /var/www/html/info.php"

Visit https://yourdomain.com/info.php in your browser
Search for "upload_max_filesize" and "post_max_size" to check the current values

For security, delete the info file after verification:

docker exec -it website_wordpress bash -c "rm /var/www/html/info.php"

Important Notes

If using the .htaccess method, ensure that your Apache configuration allows overriding PHP settings
The values (64M, 128M, etc.) can be adjusted based on your specific requirements
Always consider server resource limitations when increasing these values
Some hosting environments may have additional restrictions that override these settings