Fabio Moro

4zero4 makes your 404 pages useful. When a visitor reaches a URL that no longer 
exists, the plugin builds a search query from the requested address and redirects 
the visitor to your site’s search results, so they land on relevant content 
instead of an empty error page.
For example, a request for <code>/my-old-product-name/</code> that no longer resolves is 
turned into a search for “my old product name”.
Key points:
<ul>
<li>Zero configuration. Activate it and it works.</li>
<li>Temporary redirect (302). The original URL may become valid again, so the 
redirect is never cached as permanently moved.</li>
<li>Front-end only. It never interferes with the admin area, feeds or the REST 
API, and only acts on normal GET page views.</li>
<li>No external services. The plugin does not send any data anywhere and does 
not use tracking or analytics.</li>
</ul>
<h4>Developer hooks</h4>
The behaviour can be customised with filters:
<ul>
<li><code>p4zero4_search_terms</code> — change (or clear, to skip) the terms extracted from the URL.</li>
<li><code>p4zero4_redirect_url</code> — change (or clear, to cancel) the destination URL.</li>
<li><code>p4zero4_redirect_status</code> — change the HTTP status code (default <code>302</code>).</li>
</ul>

4zero4

Turn "page not found" (404) errors into a helpful search instead of a dead end.

Bojan Josifoski

Every WordPress site shows the same plain white error screen when something goes wrong. 
It looks broken. It destroys trust. Graceful Error Pages replaces it with a page that 
matches your brand — automatically, the moment you activate it.
What it replaces:
<ul>
<li>The <code>wp_die()</code> error screen (permission errors, expired links, security blocks)</li>
<li>PHP fatal error screens (white screen of death)</li>
</ul>
Features:
<ul>
<li>Zero-config activation — works immediately with auto-detected site name, logo, and colors</li>
<li>Five built-in templates — Minimal, Corporate, Friendly, Dark, and Starter</li>
<li>Brand customization — logo, colors, heading, message, and redirect URL</li>
<li>Merge tags — dynamic content like {site_name} and {year}</li>
<li>Self-contained styling — no theme or CDN dependencies (works even during fatal errors)</li>
<li>API safe — only overrides HTML output; REST API, AJAX, and JSON responses are untouched</li>
<li>WP-CLI safe — automatically skips CLI contexts</li>
<li>Lightweight — zero overhead on normal page loads; only runs when an error occurs</li>
<li>Fully translatable — all strings use WordPress i18n functions</li>
</ul>
How it works:
<ol>
<li>Activate the plugin</li>
<li>Your site’s error pages are instantly branded with auto-detected settings</li>
<li>Optionally customize via Settings > Error Pages</li>
</ol>
Source Code
The full source code, including unminified JavaScript and build tools, is available at: 
<a href="https://github.com/codeverbojan/graceful-error-pages" rel="nofollow ugc">github.com/codeverbojan/graceful-error-pages</a>
To build from source:
<ol>
<li>Clone the repository</li>
<li>Run <code>composer install</code></li>
<li>Run <code>npm install</code></li>
<li>Run <code>npm run build</code></li>
</ol>

Graceful Error Pages

Replace WordPress's ugly error screens with branded, professional pages — in one click.

4zero4 vs Graceful Error Pages