Keep your PHP and WordPress seperate, using the shortcode [php-to-page] you can include PHP files in your pages.
This plugin adds a Like-Button wherever you want on your blog. Before or after the content as well as a sidebar-widget. And many more!
A plugin that makes it easy to log code activity to a file.
Displays the current PHP version in the "Right Now" admin dashboard widget.
A very simple plugin for displaying full PHP Info from within the WordPress Admin menu.
This plugin adds simple HTML tag generation API to WordPress.
This plugin makes it easy to conditionally display content. No more if statements in your template files!
Adds subpages to the Dashboard menu with technical details about PHP, MySQL and other server details an administrator might need.
EASY TO USE! Dropdown console for wordperss enthusiasts to print and watch the value of PHP variables.
Adds support for the PHP5 language to the SyntaxHighlighter Evolved plugin using the [sourcecode language="php5"] tag and [php5] shortcode.
RSS link for this tag.