[4-1 PhpToken类](4-1.md) [4-2 Stringable接口](4-2.md) [4-3 WeakMap类](4-3.md) [4-4 Str_contains函数](4-4.md) [4-5 Str_starts_with和Str_ends_with函数](4-5.md) [4-6 Fdiv函数](4-6.md) [4-7 Get_resource_id函数](4-7.md) [4-8 Get_debug_type函数](4-8.md)