PHP Errors after OS X Upgrade

Question

I got to work this morning and, after upgrading to Yosemite and MAMP Pro, I am getting a series of PHP Errors and cannot get access to to CP (returns blank page). The frontend of the site itself is fetching data from the DB but the issue appears to be with the config file? I'm using FocusLabs Master Config too.

The first error is

A PHP Error was encountered Severity: Notice Message: Only variable references should be returned by reference Filename: core/Common.php Line Number: 242

The warnings after that are "Cannot modify header information" warnings.

A PHP Error was encountered Severity: Warning Message: Cannot modify header information - headers already sent by (output started at /Users/bjh/github/beacon/lighthouse/codeigniter/system/core/Exceptions.php:170) Filename: core/EE_Input.php Line Number: 212

A PHP Error was encountered Severity: Warning Message: Cannot modify header information - headers already sent by (output started at /Users/bjh/github/beacon/lighthouse/codeigniter/system/core/Exceptions.php:170) Filename: core/EE_Input.php Line Number: 212

A PHP Error was encountered Severity: Warning Message: Cannot modify header information - headers already sent by (output started at /Users/bjh/github/beacon/lighthouse/codeigniter/system/core/Exceptions.php:170) Filename: core/EE_Input.php Line Number: 212

A PHP Error was encountered Severity: Warning Message: Cannot modify header information - headers already sent by (output started at /Users/bjh/github/beacon/lighthouse/codeigniter/system/core/Exceptions.php:170) Filename: core/EE_Input.php Line Number: 212

A PHP Error was encountered Severity: Warning Message: Cannot modify header information - headers already sent by (output started at /Users/bjh/github/beacon/lighthouse/codeigniter/system/core/Exceptions.php:170) Filename: libraries/Functions.php Line Number: 446

After pulling the working copy of our site from the dev server and copying the DB it appears as though this issue is only occurring locally. :-/

Answer 1

I'm getting the same issue since upgrading to OS X Yosemite.

I suspect the real issue is your version of PHP has been upgraded to PHP 5.6.

While upgrading the OS I also swapped to PHP 5.6 and now all EE sites with debug mode enabled display this PHP notice.

Someone else on the EllisLab forums has had the same issue and a fix has been posted: https://ellislab.com/forums/viewthread/244510/#1066393

UPDATE

Sorry guys, I should have provided a code sample to the fix originally in the event that the linked page disappears.

Replace the last line in the &get_config() method of system/codeigniter/system/core/Common.php like so:

- return $_config[0] =& $config; + $_config[0] =& $config; + + return $_config[0];

This should fix the issue.

Answer 2

I'm guessing that your system is using the bundled version of Apache/PHP rather than MAMP's version. You need to stop (and disable) the system version and ensure the MAMP version is started.

Answer 3

Update your php file system "system/core/Common.php" in mac mini(OS X Yosemite) like so:

Bellow code in "Common.php" :

      return $_config[0] =& $config;

Replace by bellow code :

   $_config[0] =& $config;
   return $_config[0];

Answer 4

Try to set permissions on the local cache folder to 777.