Why "static $i = sqrt(100)" leads to fatal error ?

Question

https://code.sololearn.com/w53F1znNL96J/?ref=app

Answer 1

Michael thanx

Answer 2

"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.“

(https://www.php.net/manual/en/language.oop5.static.php)

Answer 3

AK F Lashari what's it?

Answer 4

03022337110