<?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;
$this->internalArray = array();
}
/**
* @return int
*/
public function count()
{
return count($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
*/
public function getSize()
{
return $this->size;
}
/**
* @param int $size
* @return bool
*/
public function setSize($size)
{
$this->size = $size;
return true;
}
/**
* @param string|int $index
* @return bool
*/
public function offsetExists($index)
{
return array_key_exists((int) $index, $this->internalArray);
}
/**
* @param string|int $index
* @return mixed
*/
public function offsetGet($index)
{
/** @psalm-suppress MixedReturnStatement */
return $this->internalArray[(int) $index];
}
/**
* @param string|int $index
* @param mixed $newval
* @psalm-suppress MixedAssignment
*/
public function offsetSet($index, $newval)
{
$this->internalArray[(int) $index] = $newval;
}
/**
* @param string|int $index
*/
public function offsetUnset($index)
{
unset($this->internalArray[(int) $index]);
}
/**
* Rewind iterator back to the start
* @link https://php.net/manual/en/splfixedarray.rewind.php
* @return void
* @since 5.3.0
*/
public function rewind()
{
reset($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
*/
public function current()
{
/** @psalm-suppress MixedReturnStatement */
return current($this->internalArray);
}
/**
* Return current array index
* @return int The current array index.
*/
public function key()
{
return key($this->internalArray);
}
/**
* @return void
*/
public function next()
{
next($this->internalArray);
}
/**
* Check whether the array contains more elements
* @link https://php.net/manual/en/splfixedarray.valid.php
* @return bool true if the array contains any more elements, false otherwise.
*/
public function valid()
{
if (empty($this->internalArray)) {
return false;
}
$result = next($this->internalArray) !== false;
prev($this->internalArray);
return $result;
}
/**
* Do nothing.
*/
public function __wakeup()
{
// NOP
}
}
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