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<?php |
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/** |
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* This file is part of library-template |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @author Nicolò Martini <[email protected]> |
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*/ |
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namespace StringTemplate; |
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class NestedKeyArray implements \ArrayAccess, \IteratorAggregate |
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{ |
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private $array; |
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private $keySeparator; |
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/** |
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* @param array $array |
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* @param string $keySeparator |
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*/ |
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public function __construct(array &$array, $keySeparator = '.') |
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{ |
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$this->array = $array; |
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$this->keySeparator = $keySeparator; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getIterator() |
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{ |
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return new NestedKeyIterator(new RecursiveArrayOnlyIterator($this->array)); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetExists($offset) |
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{ |
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$keys = explode($this->keySeparator, $offset); |
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$ary = &$this->array; |
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foreach ($keys as $key) { |
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if (!isset($ary[$key])) |
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return false; |
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$ary = &$ary[$key]; |
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} |
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return true; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetGet($offset) |
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{ |
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$keys = explode($this->keySeparator, $offset); |
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$result = &$this->array; |
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foreach ($keys as $key) { |
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$result = &$result[$key]; |
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} |
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return $result; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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$this->setNestedOffset($this->array, explode($this->keySeparator, $offset), $value); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetUnset($offset) |
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{ |
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$this->unsetNestedOffset($this->array, explode($this->keySeparator, $offset)); |
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} |
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/** |
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* @return array |
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*/ |
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public function toArray() |
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{ |
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return $this->array; |
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} |
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/** |
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* @param array $target |
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* @param array $offsets |
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* @param $value |
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* @return $this |
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*/ |
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private function setNestedOffset(array &$target, array $offsets, $value) |
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{ |
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$currKey = array_shift($offsets); |
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if (!$offsets) { |
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$target[$currKey] = $value; |
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} else { |
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if (!isset($target[$currKey])) |
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$target[$currKey] = array(); |
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$this->setNestedOffset($target[$currKey], $offsets, $value); |
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} |
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return $this; |
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} |
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/** |
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* @param array $target |
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* @param array $offsets |
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* @return $this |
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*/ |
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private function unsetNestedOffset(array &$target, array $offsets) |
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{ |
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$currKey = array_shift($offsets); |
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if (!$offsets) { |
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unset($target[$currKey]); |
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} elseif (isset($target[$currKey])) { |
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$this->unsetNestedOffset($target[$currKey], $offsets); |
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} |
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return $this; |
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} |
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} |
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This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)
or! empty(...)
instead.