Jake Spurlock

This simple plugin that adds a “Host-Header” HTTP header where you can define your webhost. Web partners that scan for compromised websites can notify hosts more effectively to cleanup sites.
This plugin is super overkill. Adding a simple file with the following to your <code>mu-plugins.php</code> will have the same effect.
<pre><code>// custom-host-header.php
add_filter( 'wp_headers', function( $headers ) {
 $headers['Host-Header'] = 'YOUR HOST NAME HERE';
 return $headers;
} );
</code></pre>

WordPress Host Headers

Add a Host-Header to track down hosting partners in helping combat web spam.

Sergey Biryukov

Prevents 32-bit PHP versions from hanging when processing a request containing 2.2250738585072011e-308 value.
For more information see the <a href="http://www.exploringbinary.com/php-hangs-on-numeric-value-2-2250738585072011e-308/" rel="nofollow ugc">original post</a> and <a href="http://bugs.php.net/bug.php?id=53632" rel="nofollow ugc">bug report</a> by Rick Regan.
Based on the <a href="http://www.aircraft24.com/en/info/php-float-dos-quickfix.htm" rel="nofollow ugc">non-plugin solution</a> by AirCraft24.com.

PHP Floating Point DoS Attack Workaround

Prevents 32-bit PHP versions from hanging when processing a request containing 2.2250738585072011e-308 value.

WordPress Host Headers vs PHP Floating Point DoS Attack Workaround