Fatal error Constant expression contains invalid operations

0 votes

I am getting an error:

Fatal error: Constant expression contains invalid operations in config.php on line 214

That line was:

 protected static $dbname = 'mydb_'.$appdata['id'];

Whether I did any mistakes in quotes? Or somewhere else?

My search for the error message only showed a different source cause (a dynamic default value in a function definition).

Nov 8, 2020 in PHP by kartik
• 37,520 points
18,182 views

1 answer to this question.

0 votes

Hello @kartik,

This is because a static variable contains a constant value in it. But in your case:

protected static $dbname = 'mydb_'.$appdata['id'];

$appdata['id'] is dynamic that can change its value during the execution. That's why the error is showing.

Hope it helps!!

answered Nov 8, 2020 by Niroj
• 82,880 points

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