Peter Wooster

This plugin allows developers to debug PHP errors.
Features for Developers
<ul>
<li>You can get call stack trace when PHP errors are triggered.</li>
<li>This is particularly helpful in finding errors that are triggered by the WordPress deprecation and 
doing_it_wrong code. These errors are reported in the WordPress core instead of at the location 
where the incorrect usage actually occurs. </li>
<li>You can set the error level from the Settings page, the default is trap Notice and Deprecation errors</li>
</ul>
Additional Features
There are no additional features supported by Simple Error Handler. The code is simple, small and well documented, 
so you can use it as a starting point for your own error reporting or logging plugin.

Simple Error Handler

A simple plugin that reports the call stack trace when PHP errors occur.

Marcus (aka @msykes)

Pixelite

Marcus

WP Safe Mode allows you to view your site temporarily with certain plugins disabled/enabled as well as switching to another theme.
This is particularly useful if you are experiencing problems with a specific plugin or theme and need troubleshoot without it affecting the rest of your site visitors.
Additionally, a loader file can be directly installed via FTP to help you access an inaccessible site due to PHP errors (e.g. blank screens or white screen of death) to help restore it from the admin panel.
<h4>Main Features</h4>
<ul>
<li>Enter Safe Mode for just yourself whilst logged in.</li>
<li>Enable Safe Mode for the whole site.</li>
<li>Admin Bar shortcuts for enabling/disabling Safe Mode.</li>
<li>Restrict Safe Mode to certain IP addresses.</li>
<li>Automatic installation (if file permissions allow).</li>
<li>Fallback to a default WordPress theme or one of your choice in Safe Mode.</li>
<li>Prevent or allow Must-Use plugins from loading in Safe-Mode.</li>
<li>Handy loader file via FTP when your site is completely inaccessible.</li>
<li>MultiSite Support
<ul>
<li>Network-wide Safe Mode (for just you, or everyone)</li>
<li>Restrict Network-wide Safe Mode to certain IP address</li>
</ul>
</li>
<li>MultiSite Site-Specific Safe Modes
<ul>
<li>Override Network-wide Safe Mode settings for an individual site</li>
<li>Network Admins can deactivate Network-Active and Must-Use plugins.</li>
<li>Allow individual site admins from enabling safe mode for their own site.</li>
</ul>
</li>
</ul>
<h4>Data Privacy and GDPR Compliance</h4>
No personal data is used or stored by this plugin. For those entering user-only mode, a cookie is loaded to identify that user.

WP Safe Mode

Disable plugins or switch themes for just you or the whole site for debugging, troubleshooting or accessing and restoring a broken website.

Simple Error Handler vs WP Safe Mode