| 1 | <?php | ||
| 5 | trait FluentArrayAccess | ||
| 6 | { | ||
| 7 | /** | ||
| 8 | * Get an attribute from the container. | ||
| 9 | * | ||
| 10 | * @param string $key | ||
| 11 | * @param mixed $default | ||
| 12 | * @return mixed | ||
| 13 | */ | ||
| 14 | abstract public function get($key, $default = null); | ||
| 15 | |||
| 16 | /** | ||
| 17 | * Determine if the given offset exists. | ||
| 18 | * | ||
| 19 | * @param string $offset | ||
| 20 | * @return bool | ||
| 21 | */ | ||
| 22 | public function offsetExists($offset) | ||
| 26 | |||
| 27 | /** | ||
| 28 | * Get the value for a given offset. | ||
| 29 | * | ||
| 30 | * @param string $offset | ||
| 31 | * @return mixed | ||
| 32 | */ | ||
| 33 | public function offsetGet($offset) | ||
| 37 | |||
| 38 | /** | ||
| 39 | * Set the value at the given offset. | ||
| 40 | * | ||
| 41 | * @param string $offset | ||
| 42 | * @param mixed $value | ||
| 43 | * @return void | ||
| 44 | */ | ||
| 45 | public function offsetSet($offset, $value) | ||
| 49 | |||
| 50 | /** | ||
| 51 | * Unset the value at the given offset. | ||
| 52 | * | ||
| 53 | * @param string $offset | ||
| 54 | * @return void | ||
| 55 | */ | ||
| 56 | public function offsetUnset($offset) | ||
| 60 | } | ||
| 61 | 
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: