The constant() function returns the value of a constant.
mixed constant ( string $name )
Return the value of the constant indicated by name.
constant() is useful if you need to retrieve the value of a constant, but do not know its name. I.e. it is stored in a variable or returned by a function.
Parameter | Description |
---|---|
name | Required. Specifies the name of the constant to check |
Returns the value of the constant, or NULL if the constant is not defined.