# tablepress/3.4/libraries/vendor/PhpSpreadsheet/Calculation/Engine/CyclicReferenceStack.php

TablePress – Tables in WordPress made easy, version 3.4. 69 lines.

- Page: https://pluginprobe.com/plugins/tablepress/3.4/code/libraries/vendor/PhpSpreadsheet/Calculation/Engine/CyclicReferenceStack.php
- Raw: https://pluginprobe.com/plugins/tablepress/3.4/raw/libraries/vendor/PhpSpreadsheet/Calculation/Engine/CyclicReferenceStack.php
- Modified: 2025-10-28T04:41:40+00:00

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```php
<?php

namespace TablePress\PhpOffice\PhpSpreadsheet\Calculation\Engine;

class CyclicReferenceStack
{
	/**
	 * The call stack for calculated cells.
	 *
	 * @var mixed[]
	 */
	private array $stack = [];

	/**
	 * Return the number of entries on the stack.
	 */
	public function count(): int
	{
		return count($this->stack);
	}

	/**
	 * Push a new entry onto the stack.
	 *
	 * @param int|string $value The value to test
	 */
	public function push($value): void
	{
		$this->stack[$value] = $value;
	}

	/**
				 * Pop the last entry from the stack.
				 * @return mixed
				 */
				public function pop()
	{
		return array_pop($this->stack);
	}

	/**
	 * Test to see if a specified entry exists on the stack.
	 *
	 * @param int|string $value The value to test
	 */
	public function onStack($value): bool
	{
		return isset($this->stack[$value]);
	}

	/**
	 * Clear the stack.
	 */
	public function clear(): void
	{
		$this->stack = [];
	}

	/**
	 * Return an array of all entries on the stack.
	 *
	 * @return mixed[]
	 */
	public function showStack(): array
	{
		return $this->stack;
	}
}

```