Cannot assign an empty string to a string offset

Question

I\'ve just installed PHP 7.1 and now I am seeing this error :

PHP Warning:  Cannot assign an empty string to a string offset in /postfixadmin/variables.inc.php o         


        

Answer 1

My reason for this message 'PHP Warning: Cannot assign an empty string to a string offset' is: My $fDomains variable was initiated as a string, not as an array.