I searched for this already here in SO which has similar headings still I can't figure whats happening. Kindly pardon me if this looks silly or simple as I am just learner.
I am getting an error:
Fatal error: Constant expression contains invalid operations in
config.php on line 214
protected static $dbname = 'mydb_'.$appdata['id'];
From the official Php documentation :
Like any other PHP static variable, static properties may only be initialized using a literal or constant before PHP 5.6; expressions are not allowed. In PHP 5.6 and later, the same rules apply as const expressions: some limited expressions are possible, provided they can be evaluated at compile time.
So you cannot initialize a static variable with another variable. Replace
$appdata['id'] by a constant string or remove the
This is because static declarations are resolved in compile-time, when the content of other variables is not know (see this other page of official doc).