Automattic

Donncha O Caoimh (a11n)

<p>This plugin logs the activity of supported plugins to a file, making it easier to figure out why there’s a problem.</p>
<p>If you have been asked to install this plugin because of a support issue then installing this plugin is just like installing any other plugin. Once installed, go to Settings->WP Logger and enable logging. If you have a number of supported plugins enable the one you are interested in.</p>
<p>Developers who want to use this plugin to add logging to their own plugin should see the Developers section of this documentation.</p>
<p>Mark Jaquith’s <a href="https://wordpress.org/extend/plugins/monitor-pages/" rel="ugc">Monitor Pages</a> plugin was used as a template for this plugin. Thanks Mark!</p>
<h4>Developers</h4>
<p>Other plugins can use this plugin to record important events which are then dumped to a log file. Plugins must add the event to a global array in the following way:</p>
<pre><code>$GLOBALS[ 'wp_log' ][ 'name_of_plugin' ][] = 'Some important event';
</code></pre>
<p>Plugins must also add themselves to a list of enabled plugins. This will make it easier for blog owners to filter out which plugin they want to debug on the settings page. Add and edit the following code so it is executed when the plugin is loaded.</p>
<pre><code>$GLOBALS[ 'wp_log_plugins' ][] = 'name_of_plugin';
</code></pre>
<p>A hypothetical example might be a plugin (let’s call it “Big A”) that uses the output buffer to change the letter “a” to “A”. The events recorded by this might include the following:</p>
<pre><code>$GLOBALS[ 'wp_log' ][ 'big_a' ][] = 'Created output buffer';
$GLOBALS[ 'wp_log' ][ 'big_a' ][] = 'Output buffer callback';
$GLOBALS[ 'wp_log' ][ 'big_a' ][] = 'Replaced a with A in page';
</code></pre>
<p>This plugin takes the “wp_log” array and dumps it to a file in the upload directory of the blog it’s activated on. The file is linked from the plugin settings page and can be deleted on that page too. The file is a simple text file and is not protected in any way so be careful if auth cookies are logged by a plugin.</p>
<p>A “log” function isn’t included but if you want to add one to your plugin check the constant WP_DEBUG_LOG is defined before adding to the log array. If your plugin doesn’t use a class make sure that you call the log function a unique name so it doesn’t conflict with other plugins.</p>
<pre><code>function log( $message ) {
    if ( defined( 'WP_DEBUG_LOG' ) )
        $GLOBALS[ 'wp_log' ][ 'name_of_plugin' ][] = $message;
}
</code></pre>


WP Debug Logger

A plugin that makes it easy to log code activity to a file.

Takayuki Miyauchi

TAROSKY INC.

<p>Once you have installed and activated it, you can check the following activities.</p>
<h3>Features</h3>
<ul>
<li>Super lightweight and it doesn’t affect site’s performances.</li>
<li>It has passed over 100 patterns unit test, you can use it with confidence in the enterprise.</li>
<li>Extensible event saving logs, so you can develop own add-ons for collecting it.</li>
<li>Saving logs the following activities on WordPress
<ul>
<li>Publish, update or delete published posts.</li>
<li>Activate or deactivate plugins or themes.</li>
<li>Updating WordPress core, plugins, language files.</li>
<li>Users login action</li>
<li>Login and posting via XML-RPC</li>
<li>PHP errors (On the debug mode, it also save Warning and Notice)</li>
</ul>
</li>
<li>WP-CLI command ready.</li>
</ul>
<h3>Detail of saving logs</h3>
<ul>
<li>WordPress
<ul>
<li>Core updates</li>
<li>Plugin/Theme updates</li>
<li>Language updates</li>
</ul>
</li>
<li>Post/Page/Attachment
<ul>
<li>Created</li>
<li>Updated</li>
<li>Deleted</li>
</ul>
</li>
<li>Plugin
<ul>
<li>Activated</li>
<li>Deactivated</li>
</ul>
</li>
<li>Theme
<ul>
<li>Switched</li>
</ul>
</li>
<li>User
<ul>
<li>Logged in</li>
</ul>
</li>
<li>XML-RPC
<ul>
<li>Authenticated</li>
<li>Created</li>
<li>Updated</li>
<li>Deleted</li>
</ul>
</li>
<li>PHP
<ul>
<li>Errors</li>
<li>Warnings (WP_DEBUG only)</li>
<li>Notices (WP_DEBUG only)</li>
</ul>
</li>
</ul>
<h3>WP-CLI</h3>
<p>Get a list of logs.</p>
<pre><code>$ wp log list --posts_per_page=5
</code></pre>
<p>Get a list of specific level of logs.</p>
<pre><code>$ wp list --level=error --posts_per_page=5
</code></pre>
<h3>Issues</h3>
<p><a href="https://github.com/tarosky/logbook" rel="nofollow ugc">https://github.com/tarosky/logbook</a></p>


Logbook

great!

色々なことをログに残せるので、どう変更したか後で見返せれて便利です！
そして、XML-RPCのログインをwarmで警告してくれるので、改竄を防げれて安心です。
もうこのプラグインなしではやっていけられません。

Excellent!!

Great!!!

This plugin is for logging users' activities. You can check anytime who and what has changed.

WP Debug Logger vs Logbook