# Built-in functions [Back to PHP](https://rustic-game-engine.pages.dev/markdown/scripting/php.md). All gameplay languages expose owner ID and timing, translation, declared public properties, built-in attributes, held-key input, logging, enabled state, scene lookup, instance creation, and camera selection. Use native member syntax for your language. | API | Result or effect | | --- | --- | | `rustic.entity_id()` | Stable owner ID string | | `rustic.delta_time()`, `rustic.fixed_delta_time()` | Seconds | | `rustic.get_translation()` | Three numbers; C uses `RusticVector3` with x/y/z | | `rustic.set_translation(x,y,z)` | Queues owner movement | | `rustic.get_property(name)`, `rustic.set_property(name,value)` | Reads or updates an already declared property | | `rustic.get_attribute(name)`, `rustic.edit_attribute(name,value)` | Reads or edits an owner built-in attribute | | `rustic.key(name)`, `rustic.input(name)` | Action state with pressed/released/held/axis | | `rustic.key_events()`, `rustic.any_key_pressed()` | Input event snapshot | | `rustic.log(level,message)`, `rustic.set_enabled(enabled)` | Logs or queues enabled state | | `Game.scene.Find(path)`, `Game.scene.List()` | Finds an ID or lists matching IDs | | `instance.add(source,parent)`, `instance.clone(source,parent)` | Queues creation; no immediate new ID | | `Game.setCurrentCamera(source)` | Queues camera selection by path or ID | Mutations apply after the callback, in call order. Getters read the callback's snapshot, so a getter after a setter still reads the original state. Properties and attributes must retain their engine types; numbers must be finite. Attribute names are `Name`, `Position`, `Size`, `Color`, `CanTouch`, `CanCollide`, `Anchored`, and `Parent`. Color is three RGB numbers. Instance parents must be stable entity IDs; resolve a path with `Game.scene.Find` first. Scene List returns IDs, not path strings.