CodeIgniter 500 Internal Server Error

Question

I downloaded a PHP script written using CodeIgniter. when I run it from the localhost, on going to the admin folder, it shows localhost again. Also when running from my web host, it shows a 500 Internal Server Error.

I run the site from http://localhost/myproj It works. Then when I try to go to the admin page which is at http://localhost/myproj/administrator, it gives a 500 Internal Server Error.

I read here that this might be due to a wrong code in the .htaccess file. This is my present .htaccess file

RewriteEngine On
RewriteBase /

RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)/$ $1 [L,R=301]

RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php/$1 [L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /index.php/$1 [L]

# Without mod_rewrite, route 404's to the front controller
ErrorDocument 404 /index.php

Please help me. I know it might be a very small problem, but I'm unable to find the error.

score 35 · Accepted Answer · answered Sep 12 '11 at 23:43

35

The problem with 500 errors (with CodeIgniter), with different apache settings, it displays 500 error when there's an error with PHP configuration.

Here's how it can trigger 500 error with CodeIgniter:

Error in script (PHP misconfigurations, missing packages, etc...)
PHP "Fatal Errors"

Please check your apache error logs, there should be some interesting information in there.

answered Sep 12 '11 at 23:43

tpae

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2

thank you, this helped me figure out the server's rewrite_module was not loaded. – tmjam May 03 '13 at 03:15
2

This also helped me, turns out a hook i had installed was using a function from a helper that wasn't loaded! That's hours of my life spent debugging that i want back. – Will Sampson Jul 03 '13 at 18:13
Please check your apache error logs +1 i just could not find out what my error is until i see this – William Kheng May 08 '15 at 01:30
1

Error logs did the trick. In Ubuntu 16.04, apache logs can be found /var/log/apache2 – Chad Aug 20 '16 at 04:05
thank you, in centos7 the problem I found the cause on /var/log/httpd – gandalivs Aug 19 '20 at 03:48
My problem was in the log, the .env file was not readable and all I had to do was use chmod command in centos 7 – Herii Feb 20 '21 at 18:12

score 5 · Answer 2 · answered Aug 27 '12 at 12:41

Just in case somebody else stumbles across this problem, I inherited an older CodeIgniter project and had a lot of trouble getting it to install.

I wasted a ton of time trying to create a local installation of the site and tried everything. In the end, the solution was simple.

The problem is that older CodeIgniter versions (like 1.7 and below), don't work with PHP 5.3. The solution is to switch to PHP 5.2 or something older.

score 4 · Answer 3 · answered Oct 15 '19 at 11:10

4

Make sure your root index.php file has the correct permission, its permission must be 0755 or 0644

answered Oct 15 '19 at 11:10

Samir Rahimy

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this is not worked for me. – Ilham Safeek Feb 19 '22 at 07:21
@IlhamSafeek try to use other solutions mentioned on this page. Check your PHP version as well. – Samir Rahimy Feb 20 '22 at 15:45

score 4 · Answer 4 · answered Sep 12 '11 at 04:09

4

You're trying to remove index.php from your site URL's, correct?

Try setting your $config['uri_protocol'] to REQUEST_URI instead of AUTO.

answered Sep 12 '11 at 04:09

chrishall78

158
7

Thankyou so much. After hours of searching, this was the problem to my solution – Abhishek Goel Jun 15 '14 at 13:53

score 3 · Answer 5 · edited Mar 21 '18 at 13:52

3

Try this to your .htaccess file:

<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule >

edited Mar 21 '18 at 13:52

Karol Dowbecki

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answered Mar 21 '18 at 13:46

Pierre Alexandre

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5

score 2 · Answer 6 · edited Oct 25 '16 at 03:50

2

remove comment in httpd.conf (apache configuration file):

LoadModule rewrite_module modules/mod_rewrite.so

edited Oct 25 '16 at 03:50

Clay

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answered Oct 24 '16 at 16:46

Mustapha

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score 1 · Answer 7 · edited May 23 '17 at 12:09

1

I know I am late, but this will help someone.

Check if rewrite engine is enabled.

If not, enable rewrite engine and restart server.

sudo a2enmod rewrite
sudo service apache2 restart

edited May 23 '17 at 12:09

Community

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answered Sep 01 '16 at 02:16

Paritosh

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score 1 · Answer 8 · edited Sep 05 '17 at 09:13

1

if The wampserver Version 2.5 then change apache configuration as

httpd.conf (apache configuration file): From

#LoadModule rewrite_module modules/mod_rewrite.so**

To ,delete the #

LoadModule rewrite_module modules/mod_rewrite.so**

this working fine to me

edited Sep 05 '17 at 09:13

MatSnow

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answered Sep 05 '17 at 07:57

Alvin Jose

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score 1 · Answer 9 · answered Aug 23 '21 at 15:12

Pretty late to the party but, i think the best approach to 500 internal server errors in CodeIgniter would be to enable the error log functionality in the Config.php file in the config folder and set a threshold value i.e. $config['log_threshold'] = 1,2,3,4 depending on the logs you want to view.

score 1 · Answer 10 · answered Sep 11 '11 at 11:37

1

Whenever I run CodeIgniter in a sub directory I set the RewriteBase to it. Try setting it as /myproj/ instead of /.

answered Sep 11 '11 at 11:37

Aaron W.

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Tried it. But still same error. When I check the Log file on my web host, I see the following error. Severity: Notice --> Undefined index: LOGIN_USERNAME – acidburn23 Sep 11 '11 at 11:56
What is your `$config['base_url']` and `$config['uri_protocol']` set to in the `/config/config.php`? Also, is the `LOGIN_USERNAME` something in your CI code or maybe in your web root? – Aaron W. Sep 11 '11 at 12:04
$config['base_url'] = "http://localhost/myproj/"; $config['uri_protocol'] = "AUTO"; I removed the LOGIN_USERNAME variable from the code. – acidburn23 Sep 11 '11 at 12:20
Try blanking out the `base_url`. Also, in your `/index.php` file make sure `define('ENVIRONMENT', 'development');` is set to `development` and that in your `php.ini` your `display_errors` is set to `On`. – Aaron W. Sep 11 '11 at 12:25
Tried everything but still no luck. I'm facing the same problem. – acidburn23 Sep 11 '11 at 12:39
Check into your error logs again to see if there are any errors. Something should be logged with that type of error. – Aaron W. Sep 11 '11 at 13:05
This was the log details in the wamp folder (access.log file) 127.0.0.1 - - [11/Sep/2011:18:47:46 +0530] "GET /myproj/administrator HTTP/1.1" 200 4629 127.0.0.1 - - [11/Sep/2011:18:47:46 +0530] "GET /myproj/index.php?img=gifLogo HTTP/1.1" 400 543 127.0.0.1 - - [11/Sep/2011:18:47:46 +0530] "GET /myproj/index.php?img=pngFolderGo HTTP/1.1" 400 543 127.0.0.1 - - [11/Sep/2011:18:47:46 +0530] "GET /myproj/index.php?img=pngPlugin HTTP/1.1" 400 543 – acidburn23 Sep 11 '11 at 13:21

score 0 · Answer 11 · answered Aug 29 '13 at 00:23

This probably isn't relevant any more to this thread, but hopefully helpful to somebody. I've had 500 errors for the past hour as I had a controller return an array not supported by the php version ran on my (crappy) server. Seems trivial but had the hallmarks of a codeigniter error.

I had to use:

class emck_model extends CI_Model {

    public function getTiles(){

        return array(...);

    }

}

Instead of

class emck_model extends CI_Model {

    public function getTiles(){

        return [...];

    }

}

Cheers

score 0 · Answer 12 · answered Aug 27 '19 at 18:20

0

This works fine for me

<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule >

answered Aug 27 '19 at 18:20

Georgian Onoiu

1
1

score 0 · Answer 13 · answered Dec 24 '22 at 17:07

If your are using local server, this problem is faced in Wampserver when the essential modules are not enable.

You can Enable them with:

Left click on Wampsever icon

Go to APACHE -> APACHE MODULES

scroll down and find "rewrite_module" and "headers_module"

Then mark them check

It will restart automatically. Done.

CodeIgniter 500 Internal Server Error

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