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.

tpae · Accepted Answer · 2011-09-12 23:43:19Z

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, 2011 at 23:43

tpae

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6 Comments

tmjam Over a year ago

thank you, this helped me figure out the server's rewrite_module was not loaded.

Will Sampson Over a year ago

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.

William Kheng Over a year ago

Please check your apache error logs +1 i just could not find out what my error is until i see this

Chad Over a year ago

Error logs did the trick. In Ubuntu 16.04, apache logs can be found /var/log/apache2

gandalivs Over a year ago

thank you, in centos7 the problem I found the cause on /var/log/httpd

|

Luqmaan · Accepted Answer · 2012-08-27 12:41:50Z

5

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.

answered Aug 27, 2012 at 12:41

Luqmaan

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Comments

chrishall78 · Accepted Answer · 2011-09-12 04:09:00Z

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, 2011 at 4:09

chrishall78

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1 Comment

Abhishek Goel Over a year ago

Thankyou so much. After hours of searching, this was the problem to my solution

Samir Rahimy · Accepted Answer · 2019-10-15 11:10:02Z

4

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

answered Oct 15, 2019 at 11:10

Samir Rahimy

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2 Comments

Ilham Safeek Over a year ago

this is not worked for me.

Samir Rahimy Over a year ago

@IlhamSafeek try to use other solutions mentioned on this page. Check your PHP version as well.

Karol Dowbecki · Accepted Answer · 2018-03-21 13:52:24Z

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, 2018 at 13:52

Karol Dowbecki

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answered Mar 21, 2018 at 13:46

Pierre Alexandre

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Comments

Clay · Accepted Answer · 2016-10-25 03:50:47Z

2

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

LoadModule rewrite_module modules/mod_rewrite.so

edited Oct 25, 2016 at 3:50

Clay

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answered Oct 24, 2016 at 16:46

Mustapha

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Comments

Aaron W. · Accepted Answer · 2011-09-11 11:37:14Z

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, 2011 at 11:37

Aaron W.

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7 Comments

acidburn23 Over a year ago

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

Aaron W. Over a year ago

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?

acidburn23 Over a year ago

$config['base_url'] = "localhost/myproj"; $config['uri_protocol'] = "AUTO"; I removed the LOGIN_USERNAME variable from the code.

Aaron W. Over a year ago

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.

acidburn23 Over a year ago

Tried everything but still no luck. I'm facing the same problem.

|

Community · Accepted Answer · 2017-05-23 12:09:01Z

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, 2017 at 12:09

CommunityBot

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answered Sep 1, 2016 at 2:16

Paritosh

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Comments

MatSnow · Accepted Answer · 2017-09-05 09:13:45Z

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 5, 2017 at 9:13

MatSnow

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answered Sep 5, 2017 at 7:57

Alvin Jose

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Comments

Kevin Owino · Accepted Answer · 2021-08-23 15:12:46Z

1

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.

answered Aug 23, 2021 at 15:12

Kevin Owino

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Comments

Chris GW Green · Accepted Answer · 2013-08-29 00:23:49Z

0

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

answered Aug 29, 2013 at 0:23

Chris GW Green

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Comments

Georgian Onoiu · Accepted Answer · 2019-08-27 18:20:00Z

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, 2019 at 18:20

Georgian Onoiu

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Comments

Omkar Ghurye · Accepted Answer · 2022-12-24 17:07:29Z

0

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.

answered Dec 24, 2022 at 17:07

Omkar Ghurye

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