| 1 | <?php namespace Knot\Dict; |
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| 3 | trait ArrayAccessTrait { |
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| 4 | |||
| 5 | abstract public function __unset($index); |
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| 6 | |||
| 7 | |||
| 8 | abstract public function __isset($index); |
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| 9 | |||
| 10 | |||
| 11 | abstract public function lastKey(); |
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| 12 | |||
| 13 | |||
| 14 | /** |
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| 15 | * @param mixed $offset |
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| 16 | * |
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| 17 | * @return boolean |
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| 18 | */ |
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| 19 | public function offsetExists($offset) |
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| 23 | |||
| 24 | |||
| 25 | /** |
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| 26 | * @param mixed $offset |
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| 27 | * |
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| 28 | * @return mixed |
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| 29 | */ |
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| 30 | public function &offsetGet($offset = null) |
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| 41 | |||
| 42 | |||
| 43 | /** |
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| 44 | * @param mixed $offset |
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| 45 | * @param mixed $value |
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| 46 | * |
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| 47 | * @return void |
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| 48 | */ |
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| 49 | public function offsetSet($offset, $value) |
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| 60 | |||
| 61 | |||
| 62 | /** |
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| 63 | * @param mixed $offset |
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| 64 | * |
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| 65 | * @return void |
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| 66 | */ |
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| 67 | public function offsetUnset($offset) |
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| 71 | } |
PHP has two types of connecting operators (logical operators, and boolean operators):
and&&or||The difference between these is the order in which they are executed. In most cases, you would want to use a boolean operator like
&&, or||.Let’s take a look at a few examples:
Logical Operators are used for Control-Flow
One case where you explicitly want to use logical operators is for control-flow such as this:
Since
dieintroduces problems of its own, f.e. it makes our code hardly testable, and prevents any kind of more sophisticated error handling; you probably do not want to use this in real-world code. Unfortunately, logical operators cannot be combined withthrowat this point:These limitations lead to logical operators rarely being of use in current PHP code.