Title: Fix CodeIgniter 404 Errors for Internal Links in Plesk  
PrimaryCategory: Plesk Hosting  
Type: Procedural  
Tags: codeigniter, 404_error, internal_links, rewrite_rules, web_config, plesk  
Source UI Terms: web.config  
Source Reference: Fix CodeIgniter 404 Errors for Internal Links in Plesk

---

Prerequisites:
- Access to the application installation folder on your Plesk server.
- Assistance from a developer familiar with CodeIgniter and IIS rewrite rules.

Steps:
1) Locate the `web.config` file inside the CodeIgniter application installation folder.  
2) If the `web.config` file does not exist, create a new file named `web.config` in that folder.  
3) Add the following rewrite rules to the `web.config` file to resolve 404 errors for internal URLs:
   ```xml
   
   
       
           
               
                   
                       
                       
                   
                   
                       
                       
                           
                       
                       
                   
               
           
       
   
   ```
Warning: Ensure the rewrite rules are placed exactly as shown, inside the `system.webServer` section of `web.config`.  
Warning: Incorrectly editing the `web.config` file may cause site errors; proceed with caution or seek expert help.

Summary:  
To fix 404 errors for internal links on a CodeIgniter site hosted in Plesk, add specific rewrite rules to the `web.config` file in the application’s installation folder. This update ensures URL requests are properly routed to `index.php`.

Evaluation Pairs:  
Q: How do I fix 404 errors for internal CodeIgniter links on Plesk?  
A: Add the provided rewrite rules inside the `web.config` file of your CodeIgniter application folder, which route requests correctly to `index.php`.

Q: Where do I place the rewrite rules for CodeIgniter on Plesk?  
A: Inside the `web.config` file located in your application&#39;s installation folder on the Plesk server.

Q: What if the `web.config` file does not exist?  
A: Create a new `web.config` file in the application folder and add the rewrite rules shown in this article.

<div>When internal links in your CodeIgniter site return 404 errors. This article explains how rewrite rules affect CodeIgniter on Plesk.</div>
<div> </div>
<div>This error is observed due to missing or incorrect rewrite rules associated with the application. You can add the below code in the web.config to resolve 404 internal URL errors. <br> </div>
<div>These have to be added in the web.config inside the application installation folder with the help of a developer.<br> 
<pre class="ckeditor_codeblock">&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
&lt;configuration&gt;
    &lt;system.webServer&gt;
        &lt;rewrite&gt;
            &lt;rules&gt;
                &lt;rule name=&quot;Rewrite to index.php&quot;&gt;
                    &lt;match url=&quot;index.php|robots.txt|images|test.php&quot; /&gt;
                    &lt;action type=&quot;None&quot; /&gt;
                &lt;/rule&gt;
                &lt;rule name=&quot;Rewrite CI Index&quot;&gt;
                    &lt;match url=&quot;.*&quot; /&gt;
                    &lt;conditions&gt;
                        &lt;add input=&quot;{REQUEST_FILENAME}&quot; pattern=&quot;css|js|jpg|jpeg|png|gif|ico|htm|html&quot; negate=&quot;true&quot; /&gt;
                    &lt;/conditions&gt;
                    &lt;action type=&quot;Rewrite&quot; url=&quot;index.php/{R:0}&quot; /&gt;
                &lt;/rule&gt;
            &lt;/rules&gt;
        &lt;/rewrite&gt;
    &lt;/system.webServer&gt;
&lt;/configuration&gt;  </pre>
</div>

When internal links in your CodeIgniter site return 404 errors. This article explains how rewrite rules affect CodeIgniter on Plesk.