PHPのフレームワークCodeIgniterをインストールしてから行ったこと。

http://localhost/CodeIgniter/　に設置

CodeIgniterへの設置状態

.
|-- index.php
|-- license.txt
`-- system
    |-- application
    |   |-- config
    |   |   |-- autoload.php
    |   |   |-- config.php
    |   |   |-- constants.php
    |   |   |-- database.php
    |   |   |-- doctypes.php
    |   |   |-- hooks.php
    |   |   |-- index.html
    |   |   |-- mimes.php
    |   |   |-- routes.php
    |   |   |-- smileys.php
    |   |   `-- user_agents.php
    |   |-- controllers
    |   |   |-- index.html
    |   |   `-- welcome.php
    |   |-- errors
    |   |   |-- error_404.php
    |   |   |-- error_db.php
    |   |   |-- error_general.php
    |   |   |-- error_php.php
    |   |   `-- index.html
    |   |-- helpers
    |   |   `-- index.html
    |   |-- hooks
    |   |   `-- index.html
    |   |-- index.html
    |   |-- language
    |   |   `-- english
    |   |       `-- index.html
    |   |-- libraries
    |   |   `-- index.html
    |   |-- models
    |   |   `-- index.html
    |   `-- views
    |       |-- index.html
    |       `-- welcome_message.php
    |-- cache
    |   `-- index.html
    |-- codeigniter
    |   |-- Base4.php
    |   |-- Base5.php
    |   |-- CodeIgniter.php
    |   |-- Common.php
    |   |-- Compat.php
    |   `-- index.html
    |-- database
    |   |-- DB.php
    |   |-- DB_active_rec.php
    |   |-- DB_cache.php
    |   |-- DB_driver.php
    |   |-- DB_forge.php
    |   |-- DB_result.php
    |   |-- DB_utility.php
    |   |-- drivers
    |   |   |-- index.html
    |   |   |-- mssql
    |   |   |   |-- index.html
    |   |   |   |-- mssql_driver.php
    |   |   |   |-- mssql_forge.php
    |   |   |   |-- mssql_result.php
    |   |   |   `-- mssql_utility.php
    |   |   |-- mysql
    |   |   |   |-- index.html
    |   |   |   |-- mysql_driver.php
    |   |   |   |-- mysql_forge.php
    |   |   |   |-- mysql_result.php
    |   |   |   `-- mysql_utility.php
    |   |   |-- mysqli
    |   |   |   |-- index.html
    |   |   |   |-- mysqli_driver.php
    |   |   |   |-- mysqli_forge.php
    |   |   |   |-- mysqli_result.php
    |   |   |   `-- mysqli_utility.php
    |   |   |-- oci8
    |   |   |   |-- index.html
    |   |   |   |-- oci8_driver.php
    |   |   |   |-- oci8_forge.php
    |   |   |   |-- oci8_result.php
    |   |   |   `-- oci8_utility.php
    |   |   |-- odbc
    |   |   |   |-- index.html
    |   |   |   |-- odbc_driver.php
    |   |   |   |-- odbc_forge.php
    |   |   |   |-- odbc_result.php
    |   |   |   `-- odbc_utility.php
    |   |   |-- postgre
    |   |   |   |-- index.html
    |   |   |   |-- postgre_driver.php
    |   |   |   |-- postgre_forge.php
    |   |   |   |-- postgre_result.php
    |   |   |   `-- postgre_utility.php
    |   |   `-- sqlite
    |   |       |-- index.html
    |   |       |-- sqlite_driver.php
    |   |       |-- sqlite_forge.php
    |   |       |-- sqlite_result.php
    |   |       `-- sqlite_utility.php
    |   `-- index.html
    |-- fonts
    |   |-- index.html
    |   `-- texb.ttf
    |-- helpers
    |   |-- array_helper.php
    |   |-- compatibility_helper.php
    |   |-- cookie_helper.php
    |   |-- date_helper.php
    |   |-- directory_helper.php
    |   |-- download_helper.php
    |   |-- email_helper.php
    |   |-- file_helper.php
    |   |-- form_helper.php
    |   |-- html_helper.php
    |   |-- index.html
    |   |-- inflector_helper.php
    |   |-- language_helper.php
    |   |-- number_helper.php
    |   |-- path_helper.php
    |   |-- security_helper.php
    |   |-- smiley_helper.php
    |   |-- string_helper.php
    |   |-- text_helper.php
    |   |-- typography_helper.php
    |   |-- url_helper.php
    |   `-- xml_helper.php
    |-- index.html
    |-- language
    |   |-- english
    |   |   |-- calendar_lang.php
    |   |   |-- date_lang.php
    |   |   |-- db_lang.php
    |   |   |-- email_lang.php
    |   |   |-- form_validation_lang.php
    |   |   |-- ftp_lang.php
    |   |   |-- imglib_lang.php
    |   |   |-- index.html
    |   |   |-- number_lang.php
    |   |   |-- profiler_lang.php
    |   |   |-- scaffolding_lang.php
    |   |   |-- unit_test_lang.php
    |   |   |-- upload_lang.php
    |   |   `-- validation_lang.php
    |   `-- index.html
    |-- libraries
    |   |-- Benchmark.php
    |   |-- Calendar.php
    |   |-- Cart.php
    |   |-- Config.php
    |   |-- Controller.php
    |   |-- Email.php
    |   |-- Encrypt.php
    |   |-- Exceptions.php
    |   |-- Form_validation.php
    |   |-- Ftp.php
    |   |-- Hooks.php
    |   |-- Image_lib.php
    |   |-- Input.php
    |   |-- Language.php
    |   |-- Loader.php
    |   |-- Log.php
    |   |-- Model.php
    |   |-- Output.php
    |   |-- Pagination.php
    |   |-- Parser.php
    |   |-- Profiler.php
    |   |-- Router.php
    |   |-- Session.php
    |   |-- Sha1.php
    |   |-- Table.php
    |   |-- Trackback.php
    |   |-- Typography.php
    |   |-- URI.php
    |   |-- Unit_test.php
    |   |-- Upload.php
    |   |-- User_agent.php
    |   |-- Validation.php
    |   |-- Xmlrpc.php
    |   |-- Xmlrpcs.php
    |   |-- Zip.php
    |   `-- index.html
    |-- logs
    |   `-- index.html
    |-- plugins
    |   |-- captcha_pi.php
    |   |-- index.html
    |   `-- js_calendar_pi.php
    `-- scaffolding
        |-- Scaffolding.php
        |-- images
        |   |-- background.jpg
        |   |-- index.html
        |   `-- logo.jpg
        |-- index.html
        `-- views
            |-- add.php
            |-- delete.php
            |-- edit.php
            |-- footer.php
            |-- header.php
            |-- index.html
            |-- no_data.php
            |-- stylesheet.css
            `-- view.php

.htaccessを作成

初期状態だと、index.php ファイルがURLの中に含まれるのでhttp://codeigniter.jp/user_guide_ja/general/urls.htmlにあるようにhtaccessを設置。

サブディレクトリにフレームワークを呼ぶ形になるので、http://codeigniter.jp/user_guide_ja/general/urls.htmlのとおりだとうまくいかないのでRewriteRuleを若干修正。
ついでにimgとlib対象からを外しておく。

RewriteEngine on
RewriteCond $1 !^(index\.php|img|lib|robots\.txt)
RewriteRule ^(.*)$ /CodeIgniter/index.php/$1 [L]

URLに.htmlの拡張子をつけるように修正<ガイドのURLサフィックス（接尾辞）の追加ってやつ。>

system/application/config/config.phpのurl_suffixを修正

<?php
$config['url_suffix'] = ".html";