(PHP 4, PHP 5, PHP 7)
Defines a named constant
bool define ( string $name, mixed $value [, bool $case_insensitive = false ] )
Defines a named constant at runtime.
Parameters:
name
The name of the constant.
value
The value of the constant. In PHP 5, value must be a scalar value (integer, float, string, boolean, or NULL). In PHP 7, array