Class constants don't comply with PSR standards PHP-C1000
Style
Major
As per PSR-1, class constants must be declared in all upper cases with underscore separators only.
It is recommended to follow PSR standards while developing PHP applications so the code is consistent and can be easily maintained.
Bad practice
class User
{
// invalid: class constants can't be defined in lowercase
public const active = '1';
// invalid: class constants can't be in camel case
public const inActive = '0';
}
Recommended
class User
{
// make sure class constants must be declared in upper case
public const ACTIVE = '1';
// use underscore as a separators
public const IN_ACTIVE = '0';
}