WP-ServerInfo

Contributors: GamerZ
Donate link: https://lesterchan.net/site/donation/
Tags: phpinfo, mysql, php, memcached, redis
Requires at least: 6.8
Tested up to: 7.0
Stable tag: 3.0.0
Requires PHP: 8.2
License: GPLv2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html

Display your host's PHP, MYSQL, memcached & Redis information on your WordPress dashboard.

WP-ServerInfo reports what your host is actually giving you: the operating system and web server, the PHP version and every one of its limits, the MySQL version and its variables, and the statistics of your memcached and Redis servers if you run them.

There is nothing to configure and no settings screen. Every figure is read live from the host each time you open the page, so there is nothing stored, nothing to keep in step and nothing that can go stale.

• A Server Information widget on your Dashboard with the figures you look up most often
• A full report at Tools -> WP-ServerInfo, in five tabs
• General — OS, web server, hostname, IP and port, document root, server date and load, and the headline PHP and MySQL numbers side by side
• PHP — version, Zend Engine, SAPI, loaded configuration file, loaded extensions, and every php.ini directive with its local and master value
• MySQL — version and every server variable
• memcached — the full statistics set, each row explained, when the Memcached or Memcache extension is installed
• Redis — version, uptime, memory, clients, hit ratio and eviction figures, when the phpredis extension is installed
• Sizes and counts formatted in your own locale, and memory_limit = -1 reported as Unlimited rather than as a number

I spent most of my free time creating, updating, maintaining and supporting these plugins, if you really love my plugins and could spare me a couple of bucks, I will really appreciate it. If not feel free to use it without any obligations.

Activate the plugin and you are done.

The Server Information widget appears on your Dashboard, and the full report is at Tools -> WP-ServerInfo. Both require the manage_options capability, because between them they report your document root, your server's IP address and your whole PHP and MySQL configuration.

Each tab appears only when the matching PHP extension is loaded, and by default each reports on the server running on this machine — localhost:11211 for memcached, 127.0.0.1:6379 for Redis. If your cache lives somewhere else, point the plugin at it from your theme's functions.php or a small must-use plugin:

add_filter(
	'wp_serverinfo_redis_server',
	function ( $server ) {
		$server['host']    = 'redis.internal';
		$server['port']    = 6379;
		$server['timeout'] = 1;

		return $server;
	}
);

wp_serverinfo_memcached_server takes the same shape, with host and port. Either filter may return only the keys it wants to change; the rest keep their defaults. A unix:// socket path works as the Redis host, with port set to 0.

Every capability check goes through one filter, so a site that wants a non-administrator to see the report changes it in one place:

add_filter(
	'wp_serverinfo_capability',
	function ( $capability, $context ) {
		return 'report' === $context ? 'edit_pages' : $capability;
	},
	10,
	2
);

$context is report for the Tools screen and widget for the Dashboard widget, so the two can be answered differently.

It moved to Tools -> WP-ServerInfo in 3.0.0. It is a report about your host rather than a Dashboard panel, and Tools is where WordPress keeps that kind of screen. The Dashboard widget has not moved, and its "View all" button goes to the new address.

The tab appears only when the corresponding PHP extension is loaded — Memcached or Memcache for one, phpredis for the other. Check the PHP tab's Loaded Extensions row. Installing an object cache drop-in is not the same thing as having the extension.

The extension is installed but nothing answered on the address the plugin tried. By default that is this machine on the default port; if your cache is on another host, see "The memcached and Redis tabs" above.

The load average is a Unix idea, so it is always N/A on Windows. On other hosts the plugin tries sys_getloadavg(), then /proc/loadavg, then uptime through a shell, and shared hosts commonly disable all three.

The query cache was removed in MySQL 8.0, so there is no such variable to report. Before 3.0.0 this raised "Attempt to read property on null" instead.

One row, and a tiny one. There is nothing to configure, so the plugin stores no settings at all — only wp_serverinfo_version, which records the version last run so that an upgrade knows what it is upgrading from. Deleting the plugin from the Plugins screen removes it, along with the per-user Dashboard state WordPress records when somebody closes, hides or reorders the widget.

It is built from ini_get_all(), so it lists directives and their values and nothing else. Before 2.0.0 it scraped phpinfo() output, which also printed your environment variables and request headers.

1. Dashboard widget
2. General
3. PHP
4. MySQL
5. memcached

• BREAKING: Requires WordPress 6.8 and PHP 8.2, up from 4.0 and 7.2.
• BREAKING: The report moved from Dashboard -> WP-ServerInfo to Tools -> WP-ServerInfo. The page slug is unchanged, so the URL goes from index.php?page=wp-serverinfo to tools.php?page=wp-serverinfo
• BREAKING: All thirty global functions are gone, with no deprecation shims — format_filesize(), format_php_size(), display_serverinfo(), get_mysql_version(), get_serverload(), get_gd_version() and the rest are now methods on WP_ServerInfo_Format, WP_ServerInfo_MySQL, WP_ServerInfo_PHP and WP_ServerInfo_Cache. They were never a documented API, and their generic names collided with other plugins
• NEW: wp_serverinfo_memcached_server and wp_serverinfo_redis_server filters to point the memcached and Redis panels at a server other than localhost
• NEW: wp_serverinfo_capability filter, so the report and the widget can be handed to somebody other than an administrator, separately
• NEW: The memcached and Redis panels say the server is unreachable instead of rendering an empty panel
• NEW: A wp_serverinfo_version row recording the version last run, and an uninstall.php that deletes it on a single site and across a network
• NEW: Uninstalling now clears the per-user dashboard state WordPress records for the Server Information widget, which previously stayed in the database forever
• FIXED: "Attempt to read property on null" on every render of the General tab and the dashboard widget, because MySQL 8.0 removed query_cache_size and the missing row was dereferenced anyway
• FIXED: Lowercase PHP shorthand sizes (128m, 1g) displayed as the raw string instead of a formatted size
• FIXED: memory_limit = -1 displayed as "unknown" rather than "Unlimited"
• FIXED: max_execution_time = 0, meaning no script timeout, displayed as "N/As"
• FIXED: A value sitting exactly on a unit boundary used the unit below it, so one gibibyte displayed as "1,024.0 MiB"
• FIXED: The server load probe ran system('uptime'), which prints its output rather than returning it, so the raw uptime line was printed into the General table on hosts where system() was enabled
• FIXED: The dashboard widget showed a bare ":80" for the server IP on IIS
• FIXED: PHP 8 warnings from the memcached panel when the server did not report every statistic
• CHANGED: Read the server load from sys_getloadavg() where available, falling back to /proc/loadavg and then a shell
• CHANGED: Restructure the plugin into includes/ with one class per concern, all prefixed WP_ServerInfo_; the main file is now just the header, constants and boot
• CHANGED: Remove the dead phpinfo() scraping fallback in the GD version probe
• CHANGED: The screens use core's own table and tab classes, and carry no inline styles at all. The RTL handling is one dir attribute rather than a stylesheet with a physical text-align and an !important
• CHANGED: Add a PHPUnit test suite, both single site and multisite, and GitHub Actions CI

Requires WordPress 6.8 and PHP 8.2, up from WordPress 4.0 and PHP 7.2.

The screen moved from Dashboard to Tools, from /wp-admin/index.php?page=wp-serverinfo to /wp-admin/tools.php?page=wp-serverinfo. The page slug is unchanged. It is a report about your host rather than a Dashboard panel, and Tools is where WordPress keeps that sort of screen. The Server Information dashboard widget stays where it was, and its "View all" button follows the page.

All thirty global functions are gone. format_filesize(), format_php_size(), get_mysql_version(), get_serverload(), get_gd_version(), display_serverinfo() and the rest are methods on WP_ServerInfo_Format, WP_ServerInfo_MySQL, WP_ServerInfo_PHP and WP_ServerInfo_Cache. They were never a documented API and there are no shims, so a theme or snippet calling one will fatal. The names were generic enough to collide anyway — WP-DownloadManager defines a format_filesize() of its own, and whichever plugin loaded first won.

Three new filters. wp_serverinfo_memcached_server and wp_serverinfo_redis_server are the only way to point those two panels at a server that is not on localhost; wp_serverinfo_capability hands the screen to somebody other than an administrator. All three are new rather than renamed, so nothing existing breaks.

The plugin now stores one row, wp_serverinfo_version, recording the version last run so a future upgrade knows what it is upgrading from. There is still no settings screen. Deleting the plugin removes that row and also clears the per-user dashboard state WordPress recorded whenever somebody closed, hid or reordered the widget, which 2.0.0 left in the database forever.