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Diffstat (limited to 'user_guide_src/source/installation/upgrade_303.rst')
-rw-r--r-- | user_guide_src/source/installation/upgrade_303.rst | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/user_guide_src/source/installation/upgrade_303.rst b/user_guide_src/source/installation/upgrade_303.rst index a98eed0d4..d13a0fe46 100644 --- a/user_guide_src/source/installation/upgrade_303.rst +++ b/user_guide_src/source/installation/upgrade_303.rst @@ -11,4 +11,45 @@ Step 1: Update your CodeIgniter files Replace all files and directories in your *system/* directory. .. note:: If you have any custom developed files in these directories, - please make copies of them first.
\ No newline at end of file + please make copies of them first. + +Step 2: Make sure your 'base_url' config value is not empty +=========================================================== + +When ``$config['base_url']`` is not set, CodeIgniter tries to automatically +detect what your website's base URL is. This is done purely for convenience +when you are starting development of a new application. + +Auto-detection is never reliable and also has security implications, which +is why you should **always** have it manually configured! + +One of the changes in CodeIgniter 3.0.3 is how this auto-detection works, +and more specifically it now falls back to the server's IP address instead +of the hostname requested by the client. Therefore, if you've ever relied +on auto-detection, it will change how your website works now. + +In case you need to allow e.g. multiple domains, or both http:// and +https:// prefixes to be dynamically used depending on the request, +remember that *application/config/config.php* is still a PHP script, in +which you can create this logic with a few lines of code. For example:: + + $allowed_domains = array('domain1.tld', 'domain2.tld'); + $default_domain = 'domain1.tld'; + + if (in_array($_SERVER['HTTP_HOST'], $allowed_domains, TRUE)) + { + $domain = $_SERVER['HTTP_HOST']; + } + else + { + $domain = $default_domain; + } + + if ( ! empty($_SERVER['HTTPS'])) + { + $config['base_url'] = 'https://'.$domain; + } + else + { + $config['base_url'] = 'http://'.$domain; + } |