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<?php if (class_exists('SplFixedArray')) { return; } /** * The SplFixedArray class provides the main functionalities of array. The * main differences between a SplFixedArray and a normal PHP array is that * the SplFixedArray is of fixed length and allows only integers within * the range as indexes. The advantage is that it allows a faster array * implementation. */ class SplFixedArray implements Iterator, ArrayAccess, Countable { /** @var array<int, mixed> */ private $internalArray = array(); /** @var int $size */ private $size = 0; /** * SplFixedArray constructor. * @param int $size */ public function __construct($size = 0) { $this->size = $size; $this->internalArray = array(); } /** * @return int */ #[\ReturnTypeWillChange] public function count() { return count($this->internalArray); } /** * @return array */ public function toArray() { ksort($this->internalArray); return (array) $this->internalArray; } /** * @param array $array * @param bool $save_indexes * @return SplFixedArray * @psalm-suppress MixedAssignment */ public static function fromArray(array $array, $save_indexes = true) { $self = new SplFixedArray(count($array)); if($save_indexes) { foreach($array as $key => $value) { $self[(int) $key] = $value; } } else { $i = 0; foreach (array_values($array) as $value) { $self[$i] = $value; $i++; } } return $self; } /** * @return int */ #[\ReturnTypeWillChange] public function getSize() { return $this->size; } /** * @param int $size * @return bool */ #[\ReturnTypeWillChange] public function setSize($size) { $this->size = $size; return true; } /** * @param string|int $index * @return bool */ #[\ReturnTypeWillChange] public function offsetExists($index) { return array_key_exists((int) $index, $this->internalArray); } /** * @param string|int $index * @return mixed */ #[\ReturnTypeWillChange] public function offsetGet($index) { /** @psalm-suppress MixedReturnStatement */ return $this->internalArray[(int) $index]; } /** * @param string|int $index * @param mixed $newval * @psalm-suppress MixedAssignment */ #[\ReturnTypeWillChange] public function offsetSet($index, $newval) { $this->internalArray[(int) $index] = $newval; } /** * @param string|int $index */ #[\ReturnTypeWillChange] public function offsetUnset($index) { unset($this->internalArray[(int) $index]); } /** * Rewind iterator back to the start * @link https://php.net/manual/en/splfixedarray.rewind.php * @return void * @since 5.3.0 */ #[\ReturnTypeWillChange] public function rewind() { reset($this->internalArray); } /** * Return current array entry * @link https://php.net/manual/en/splfixedarray.current.php * @return mixed The current element value. * @since 5.3.0 */ #[\ReturnTypeWillChange] public function current() { /** @psalm-suppress MixedReturnStatement */ return current($this->internalArray); } /** * Return current array index * @return int The current array index. */ #[\ReturnTypeWillChange] public function key() { return key($this->internalArray); } /** * @return void */ #[\ReturnTypeWillChange] public function next() { next($this->internalArray); } /** * Check whether the array contains more elements * @link https://php.net/manual/en/splfixedarray.valid.php * @return bool true if the array contains any more elements, false otherwise. */ #[\ReturnTypeWillChange] public function valid() { if (empty($this->internalArray)) { return false; } $result = next($this->internalArray) !== false; prev($this->internalArray); return $result; } public function __sleep() { return $this->internalArray; } /** * Do nothing. */ public function __wakeup() { // NOP } public function __serialize() { return array_values($this->internalArray); } public function __unserialize(array $data) { $length = count($data); $values = array_values($data); for ($i = 0; $i < $length; ++$i) { $this->internalArray[$i] = $values[$i]; } $this->size = $length; } }
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