Insert PHP should be listed in Plugins > Installed Plugins but it won’t be listed in Appearance > Widgets.
Just use the plugin. No need to futz with appearance as there’s really nothing to adjust. Here’s lots of information:
http://www.willmaster.com/software/WPplugins/insert-php-wordpress-plugin.php
But it’s fairly simple to use. Put [insert_php]…[/insert_php] into your post or page (use the “Text” tab, not “Visual”) and replace … with your PHP code. Example:
[insert_php]
echo "Hello World!";
[/insert_php]
Will
You are welcome, dccharron.
I wish you good experiences with your coding.
Will