Codeigniter displays a blank page instead of error messages

Question

I m using Codeigniter  and instead of error messages I m just getting a blank page  Is there any way to show PHP error messages instead  It s very hard to debug when I get no feedback   My environment is Ubuntu with Apache

User · Answer

This behavior occurs when you have basic php syntax error in your code  In case when you have syntax errors the php parser does not parse the code completely and didnot display anything so all of the above suggestion would work only if you have other than syntax errors

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I ran into this because I had a CLI running via cron as the root user  thus creating log files with root root  When you tried to navigate to a URI everything would work fine but CI exhibiting the blank page likely because it didn t have write permission to the log file

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I had the same problem a couple days ago  My development environment is Win8 and the website was working just fine  but when i uploaded the files to production server  Linux  was displaying a blank page  Turns out that models and controllers s filenames should start with a uppercase letter   The file must be called    Blog php     with a capital    B     Class names must start with an uppercase letter   In windows environment this wont matter since windows does not differentiate uppercase and lowercase  but in linux environment  the files wont be displayed  Hope I ve helped

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In system core Common php there is an exception handler  with a block of code that looks like this       We don t bother with  strict  notices since they tend to fill up     the log file with excess information that isn t normally very helpful  if   severity    E STRICT        return      By removing the if and the return and the incorrect comment  I was able to get an error message  instead of just a blank page  This project isn t using the most recent version of CodeIgniter  hopefully they ve fixed this bug by now

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This happens to me whenever I do autoload stuff in autoload php like the  database   To resolve this  If you re using Windows OS    Open your php ini     Search and uncomment this line - extension php mysql dll   Please also check If the PHP directive points to where your extensions is located    Mine is extension dir    C  php-5 4 8-Win32-VC9-x86 ext   Restart Apache and refresh your page

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Make sure php5-mysql is installed

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If you get net  ERR CONTENT DECODING FAILED in the console then you are using gzip in your  htaccess file but gzip encoding is Off  Enable zlib output compression On in php ini and restart Apache

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check if error reporting is ON at server or not  if that id off you wont get any errors and just blank page  if you are on a shared server then you can enable error reporting via htaccess  In codeIgniter add following in your htaccess  php flag display errors On   and set  error reporting E ERROR      or what ever setting desired in php   hope it will work for you

User · Answer

Are you using the   symbol anywhere   If you have something like    include  page with error php      You will get a blank page

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The error  In my case  was occurring because my Apache server was configured to run PHP as Fast CGI  I changed it to FPM and it worked

User · Answer

please check either error folder is in application folder of not in my case i replace error folder in application folder

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Another method is to see if you ve surpassed the error checking in your code by accident  Search all your code for any instance of error reporting    If you call it without parameters  it just returns the current level  and is harmless  If you call it with a parameter  such as 0  zero   it will turn off error reporting   You can test for this in CodeIgnitor by looking at their core library under    system core Common php and finding a section that s at about line 615 that looks like   if    severity  amp  error reporting         severity       return       Add something like   if    severity  amp  error reporting         severity       echo  Suppressing errors       return       and you should be able to trap for surpassed errors  and debug from there

User · Answer

Make sure you don t have a blank index html file in your root folder  It happens

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after installation of xamp wamp you may notice few errors of similar nature  If your website was already running dont worry  it is a configuration related issue   1  check database connections in database php file  inside application folder 2  check config php file check url is correct or not  3  by default short tags are off in new installations then follow the procedure below  in php ini file change  short open tag Off  to  short open tag On   Make sure to restart apache after doing this   hope this helps

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If you have this in your php ini   display error   On    and you have this in your CI Application at the same time  error reporting 0     you ll get HTTP 1 1 200 OK and a completely bank page   That s because when display error is on  the php-fpm always return HTTP code 200  And all the errors to output are forbidden by error reporting 0    For CI application the entry index php sets up the running environment as bellows   if isset   SERVER  SERVER ENV           define  ENVIRONMENT     SERVER  SERVER ENV       else       define  ENVIRONMENT    development       if  defined  ENVIRONMENT          switch  ENVIRONMENT                case  development               error reporting E ALL               ini set  display errors   1           break           case  testing           case  production               error reporting 0           break           default              exit  The application environment is not set correctly               In short  when you set ENV directive in your webserver s conf say Nginx s fastcgi params   fastcgi param  SERVER ENV         production    then CI will automatically set  error reporting 0

User · Answer

load your url helper when you create a function eg   visibility function name             this- gt load- gt helper  url        the it will show you errors or a view you loaded

User · Answer

Often when codeigniter displays nothing  there is a syntax error  Mostly if the app was running seamlessly previously  just look around your most recent edits  For me the experience this time was the entire app  not just a page  So I did a quick brain scan for the most recent edits I had done and worked backwards  reviewing each file I had worked on this day  Turned out to be some  where  clauses in two model files  For instance  I had    this- gt db- gt where  Type    gt   Blog    rather than  this- gt db- gt where  Type    Blog

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I was having same problem  i installed latest xamp version and found my site is not working  after research and wasting time i found that   I need to turn on following tag in php ini file short open tag On  Make sure to restart apache after doing this   Hope this helps  most of these problems are related to php ini file or fresh installation if your site was already running as other people facing similar issue

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i was also facing the same problem and tried almost all the things but finally i restarted my server and i found everything started working fine  i don t know how     i think it was some server side problem that s why my PHP CODE was not giving any error

User · Answer

If you re using CI 2 0 or newer  you could change ENVIRONMENT type in your index php to define  ENVIRONMENT    testing     Alternatively  you could add php flag display errors on to your  htaccess file

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First of all you need to give the permission of your Codeigniter folder  It s might be the permission issue and then start your server

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In your index php file add the line  define  ENVIRONMENT   isset   SERVER  CI ENV        SERVER  CI ENV      development

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Since none of the solutions seem to be working for you so far  try this one   ini set  display errors   1     http   www php net manual en errorfunc configuration php ini display-errors  This explicitly tells PHP to display the errors  Some environments can have this disabled by default   This is what my environment settings look like in index php        ---------------------------------------------------------------    APPLICATION ENVIRONMENT   ---------------------------------------------------------------     define  ENVIRONMENT    development         ---------------------------------------------------------------    ERROR REPORTING   ---------------------------------------------------------------     if  defined  ENVIRONMENT          switch  ENVIRONMENT                case  development                  Report all errors             error reporting E ALL                   Display errors in output             ini set  display errors   1           break           case  testing           case  production                  Report all errors except E NOTICE                This is the default value set in php ini             error reporting E ALL   E NOTICE                   Don t display errors  they can still be logged              ini set  display errors   0           break           default              exit  The application environment is not set correctly

User · Answer

Just for anyone who is still looking for answers    db  default    dbdriver      mysqli     make sure you use mysqli  not mysql     database php

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Codeigniter doesn t seem to throw an error message when I was referencing a view that did not exist   In my example I had within my controller    this- gt load- gt view   admin index access controls groups add      Because the file did not exist  I got a blank  An error has occurred page    I changed the code to    this- gt load- gt view   admin access controls groups add      This was how I resolved the same issue you seem to be having  hope this helps someone some day

User · Answer

you can set it in the main index php       define  ENVIRONMENT    development         ---------------------------------------------------------------    ERROR REPORTING   ---------------------------------------------------------------       Different environments will require different levels of error reporting     By default development will show errors but testing and live will hide them       if  defined  ENVIRONMENT          switch  ENVIRONMENT                case  development               error reporting E ALL           break       case  testing       case  production           error reporting 0       break       default          exit  The application environment is not set correctly

User · Answer

I had this same problem and as Shayan Husaini pointed out  I had an undetected syntax error   I solved it using the php linter in the terminal   php -l file php   You can also use something like this to use the linter in every file in some folder   find -type f -name    php  -exec php -l           And to filter just the ones with errors   find -type f -name    php  -exec php -l           grep     N     That should show files with parsing errors and the line where the error is

User · Answer

Try adding this to your index php file  error reporting E ALL

[php] Codeigniter displays a blank page instead of error messages

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