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<?php |
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namespace SubjectivePHP\Spl\Traits; |
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trait ArrayAccessTrait |
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{ |
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/** |
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* Sets the value at the specified index $offset to $value |
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* |
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* @param string|integer $offset The index being set. |
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* @param mixed $value The new value for the index. |
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* |
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* @return void |
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* |
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* @throws \InvalidArgumentException Thrown if $offset is not null, an integer or a string. |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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if ($offset === null) { |
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$this->container[] = $value; |
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return; |
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} |
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if (!is_string($offset) && !is_int($offset)) { |
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throw new \InvalidArgumentException('$offset must be an integer or string'); |
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} |
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$this->container[$offset] = $value; |
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} |
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/** |
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* Returns whether the requested index exists. |
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* |
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* @param mixed $offset The index being checked. |
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* |
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* @return boolean |
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*/ |
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public function offsetExists($offset) |
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{ |
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if (is_string($offset) || is_int($offset)) { |
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return array_key_exists($offset, $this->container); |
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} |
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return false; |
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} |
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/** |
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* Unsets the value at the specified index |
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* |
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* @param mixed $offset The index being unset. |
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* |
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* @return void |
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*/ |
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public function offsetUnset($offset) |
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{ |
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if (is_string($offset) || is_int($offset)) { |
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unset($this->container[$offset]); |
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} |
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} |
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/** |
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* Returns the value at the specified index. |
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* |
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* @param integer|string $offset The index with the value. |
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* |
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* @return mixed |
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* |
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* @throws \InvalidArgumentException Thrown if $offset is not null, an integer or a string. |
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*/ |
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public function offsetGet($offset) |
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{ |
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if (!is_string($offset) && !is_int($offset)) { |
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throw new \InvalidArgumentException('$offset must be an integer or string'); |
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} |
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return array_key_exists($offset, $this->container) ? $this->container[$offset] : null; |
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} |
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} |
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subjective-php /
spl-traits
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: