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System Requirements for DJIA Cache

The system requirements for DJIA Cache are short, and most current hosting plans already meet all of them. Check the list below before you install, because a mismatched PHP or database version is behind almost every failed activation.

To ensure DJIA Cache runs reliably and delivers stable performance improvements, your site must meet the following requirements:

Meeting the DJIA Cache system requirements takes a minute to check and prevents almost every installation problem. Review the versions below before you activate the plugin.

Checking the system requirements for DJIA Cache from the Tools tab
Run Cache Tests in the Tools tab checks the live environment after installation.

WordPress Version

WordPress 5.0 or higher
We strongly recommend using the latest stable version of WordPress for maximum compatibility, security, and performance.

PHP Version

PHP 8.0 or higher

DJIA Cache is fully compatible with PHP 8.0+ and performs significantly better on newer PHP versions.

For optimal performance, we recommend:

  • PHP 8.1 or higher
  • OPcache enabled

Database Version

MySQL 5.7+ or MariaDB 10.3+

DJIA Cache works best on up-to-date database engines. Older database versions may impact performance or compatibility.

File Permissions

To function correctly, DJIA Cache requires:

  • wp-content/ folder → Must be writable
    DJIA Cache stores cache files, generated assets, and optimization data inside this directory.
  • wp-config.php → Write access required (optional but recommended)
    Needed for certain advanced configurations and constant definitions.

Folder Structure

DJIA Cache expects a standard WordPress directory structure:

  • wp-content
  • wp-includes
  • wp-admin

Custom folder renaming, symbolic links, or heavily modified setups may cause unexpected behavior.

Public accessibility

Your site must be publicly accessible.

DJIA Cache may not function correctly if your site is:

  • Hosted on a local environment
  • Behind HTTP authentication
  • Protected by server-level password restrictions
  • Blocked from external requests

Some features (like cache warmup or performance validation) require external access.

Unsupported Environments

Certain preconfigured server stacks or heavily customized hosting environments may not be fully supported.

If you are unsure whether your setup is compatible, contact support before installation.

Summary of the system requirements for DJIA Cache

In short: WordPress 5.0 or higher, PHP 8.0 or higher with OPcache enabled, MySQL 5.7 or MariaDB 10.3 or higher, a writable wp-content folder, a standard WordPress directory structure, and a publicly reachable site. Most current managed hosting plans already meet every one of these.

What happens if a requirement is not met

The plugin does not silently misbehave. On an unsupported PHP version it refuses to activate rather than leaving your site half-configured, and if the cache directory cannot be written it reports the problem in the dashboard instead of serving stale or empty pages. Features that depend on outbound requests, such as warm cache and performance validation, are simply skipped on a site that is not publicly reachable.

If you are unsure about your environment, your hosting control panel shows the PHP and database versions on its main overview screen, and most hosts let you switch PHP version yourself in one click.

Further reading: WordPress hosting requirements.