Python too.

TypeScript doesn't need the "function" keyword for a method in an object or on a class though.

const foo = {
  bar(): string {
   ... 
  } 
}

which I assume is doable because the syntax is unambiguous.

PHP's object orientation is similar to languages like Java and C#, which is what I was comparing to.

It enforces scalar types (string, int, etc) at runtime if you enable strict mode. There's also static analysis tools like PHPStan and Psalm that will flag issues at build time.

TypeScript doesn't need the "function" keyword for a method in an object or on a class though.

const foo = {
  bar(): string {
   ... 
  } 
}

which I assume is doable because the syntax is unambiguous.

In PHP's case, the method syntax should also be unambiguous.