Expressions And Operators: Nameof
An expression to get the name of a class as a string, replacement for
::class expressions in
string positions.
Quickstart
class C {}
function expect_string(string $s): void {}
function test(): void {
expect_string(nameof C);
$d = dict[];
$d[nameof C] = 4;
}
Full Example
nameof supports direct class names, traits and interfaces, enums, and type aliases.
It also supports the special class identifiers self, static, and parent where
they are valid.
class B {}
class C extends B {}
trait T {
require extends B;
public static function f(): void {
var_dump(nameof T); // "T"
var_dump(nameof self); // "D" (user of trait)
var_dump(nameof parent); // "C" (parent of trait user, not B)
var_dump(nameof static); // "E", receiver for ::f() in main
}
}
class D extends C { use T; }
class E extends D {}
<<__EntryPoint>>
function main(): void {
E::f();
}
The type of a nameof Target expression is
classname<Target> and typename<Target> when Target
is a type alias. Reified generics are not
supported targets for nameof.
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