Unable to resize SplfixedArray after being unserialized in PHP 8.2.15 #13531

<?php
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
ini_set('error_reporting', E_ALL);

echo "============" . "<br />";
echo "Testing in " . phpversion() . "<br />";
echo "============";
echo "<br /><br />";

/**
 * Create 5 items
 */
$array = new SplFixedArray(5);

/**
 * Get size
 * EXPECTED: 5
 */
$size = $array->getSize();
echo "Original size before serializing. Expected result is 5." . "<br />";
echo "Actual result: $size";
echo "<br /><br />";

/**
 * Serialize SPLFixedArray object
 */
$serialized = serialize($array);

/**
 * Unserialize SPLFixedArray object
 */
$array = unserialize($serialized);

/**
 * Get size
 * EXPECTED: 5
 */
$size = $array->getSize();
echo "Original size after serializing. Expected is still 5." . "<br />";
echo "Actual result is $size";
echo "<br /><br />";
   
/**
 * Resize SPLFixedArray to 6 items
 */
echo "Resizing array to 6 items" . "<br />";
$array->setSize(6);
/**
 * Get size after resize
 * EXPECTED: 6
 */
$size = $array->getSize();
echo "Updated size after resize. " . "<em>" . "Expected is 6." . "</em>" . "<br />";
echo "<strong>" . "Actual result is $size" . "</strong>";
echo "<br />";