Due to some discontinued functions in PHP 5.4 – VTiger CRM is no longer compatible with PHP 5.4. VTiger CRM PHP 5.4 Compatibility Patch includes the instructions as well as the necessary files to get your VTiger CRM up and running.

To be specific, the PHP function “split” was removed that would cause your VTiger CRM to blank out and stop functioning. Possible symptoms are:

• Not being able to login – getting white blank screen
• Not being able to open any module – getting white blank screen
• Getting a blank screen while creating an activity from any module
• Can’t access Monthly or Yearly Views on the Calendar

Possible error messages:

• Fatal error: Cannot re-assign auto-global variable _FILES in /vtigercrm/include/utils/CommonUtils.php on line 1395
• Warning: session_regenerate_id(): Cannot regenerate session id – headers already sent in /vtigercrm/modules/Users/Authenticate.php on line 40
• Fatal error: Call to undefined function session_unregister() in /vtigercrm/modules/Users/Authenticate.php on line 70

VTiger CRM PHP 5.4 Compatibility Patch has been tested and confirmed to be working. If you are not certain that the issue is caused by PHP 5.4 – feel free to Contact VTiger CRM Experts. We do not charge for consultation.