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