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<?php |
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/** |
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* components |
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* |
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* @author Wolfy-J |
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*/ |
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namespace Spiral\ORM\Entities\Relations; |
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use Spiral\Database\Exceptions\QueryException; |
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use Spiral\ORM\CommandInterface; |
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use Spiral\ORM\Commands\NullCommand; |
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use Spiral\ORM\ContextualCommandInterface; |
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use Spiral\ORM\Entities\RecordIterator; |
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use Spiral\ORM\Entities\Relations\Traits\MatchTrait; |
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use Spiral\ORM\Exceptions\RelationException; |
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use Spiral\ORM\Exceptions\SelectorException; |
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use Spiral\ORM\RecordInterface; |
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use Spiral\ORM\RelationInterface; |
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class ManyToManyRelation extends AbstractRelation implements \IteratorAggregate |
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{ |
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use MatchTrait; |
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/** |
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* @var bool |
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*/ |
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private $autoload = true; |
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/** |
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* @var \SplObjectStorage |
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*/ |
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private $pivotData; |
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/** |
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* @var RecordInterface[] |
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*/ |
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private $linked = []; |
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/** |
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* @var RecordInterface[] |
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*/ |
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private $unlinked = []; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function withContext( |
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RecordInterface $parent, |
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bool $loaded = false, |
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array $data = null |
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): RelationInterface { |
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/** |
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* @var self $relation |
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*/ |
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$relation = parent::withContext($parent, $loaded, $data); |
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$relation->pivotData = new \SplObjectStorage(); |
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return $relation; |
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} |
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/** |
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* Partial selections will not be autoloaded. |
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* |
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* Example: |
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* |
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* $post = $this->findPost(); //no comments |
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* $post->tags->partial(true); |
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* assert($post->tags->count() == 0); //never loaded |
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* |
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* $post->comments->add($comment); |
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* |
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* @param bool $partial |
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* |
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* @return ManyToManyRelation |
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*/ |
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public function partial(bool $partial = true): self |
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{ |
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$this->autoload = !$partial; |
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return $this; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isPartial(): bool |
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{ |
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return !$this->autoload; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function setRelated($value) |
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{ |
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if (is_null($value)) { |
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$value = []; |
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} |
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if (!is_array($value)) { |
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throw new RelationException("HasMany relation can only be set with array of entities"); |
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} |
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//Sync values without forcing it (no autoloading), i.e. clear CURRENT associations |
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$this->sync($value, [], false); |
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} |
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/** |
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* @return $this |
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*/ |
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public function getRelated() |
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{ |
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return $this; |
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} |
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/** |
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* Iterate over linked instances, will force pre-loading unless partial. |
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* |
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* @return \ArrayIterator |
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*/ |
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public function getIterator() |
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{ |
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return new \ArrayIterator($this->loadData(true)->linked); |
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} |
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/** |
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* Get all unlinked records. |
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* |
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* @return \ArrayIterator |
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*/ |
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public function getUnlinked() |
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{ |
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return new \ArrayIterator($this->unlinked); |
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} |
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/** |
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* todo: write docs |
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* |
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* @param array $records |
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* @param array $pivotData |
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* @param bool $force |
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*/ |
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public function sync(array $records, array $pivotData = [], bool $force = true) |
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{ |
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if ($force) { |
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//Load existed data |
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$this->loadData(true); |
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} |
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} |
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public function setPivot($record, array $pivotData) |
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{ |
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$this->pivotData->offsetSet($record, $pivotData); |
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} |
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public function getPivot($record) |
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{ |
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return $this->pivotData->offsetGet($record); |
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} |
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public function link($record, array $pivotData = []) |
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{ |
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//Linkage! |
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//$this->linked[] = $record; |
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$this->pivotData->offsetSet($record, $pivotData); |
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} |
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public function unlink($record) |
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{ |
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} |
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public function has($query) |
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{ |
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} |
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public function matchOne($query) |
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{ |
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} |
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public function matchMultiple($query) |
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{ |
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} |
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public function queueCommands(ContextualCommandInterface $command): CommandInterface |
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{ |
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return new NullCommand(); |
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} |
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/** |
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* Load related records from database. |
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* |
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* @param bool $autoload |
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* |
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* @return self |
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* |
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* @throws SelectorException |
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* @throws QueryException (needs wrapping) |
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*/ |
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protected function loadData(bool $autoload = true): self |
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{ |
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if ($this->loaded) { |
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return $this; |
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} |
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$this->loaded = true; |
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if (empty($this->data) || !is_array($this->data)) { |
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if ($this->autoload && $autoload) { |
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//Only for non partial selections |
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// $this->data = $this->loadRelated(); |
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} else { |
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$this->data = []; |
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} |
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} |
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return $this->initInstances(); |
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} |
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/** |
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* Init relations and populate pivot map. |
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* |
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* @return ManyToManyRelation |
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*/ |
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private function initInstances(): self |
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{ |
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if (is_array($this->data) && !empty($this->data)) { |
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//Iterates and instantiate records |
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$iterator = new RecordIterator($this->data, $this->class, $this->orm); |
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foreach ($iterator as $pivotData => $item) { |
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if ($this->has($item)) { |
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//Skip duplicates |
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continue; |
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} |
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$this->pivotData->attach($item, $pivotData); |
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$this->linked[] = $item; |
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} |
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} |
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//Memory free |
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$this->data = null; |
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return $this; |
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} |
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} |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.