PHP Stack Util

A PHP library providing common Stack implementation.

Installation

{
   	"require": {
        "chroma-x/stack-util": "~1.0"
    }
}

Usage

Autoloading and namesapce

require_once('path/to/vendor/autoload.php');

Handling a stack

Pushing to the stack

use ChromaX\StackUtil\Stack;

$stack = new Stack();

$stack
	->push('Item')
	->push('Another item')
	->push(12)
	->push(null)
	->push(8.12);

$stackSize = $stack->size();
echo 'Stack size: ' . $stackSize . PHP_EOL;

Output

Stack size: 5

Reading from the stack

Getting the last item

$lastItem = $stack->get();
echo 'Last item: ' . $lastItem . PHP_EOL;

Output

Last item: 8.12

Getting an item by index

If the index is not available null is returned

$secondItem = $stack->get(1);
echo 'Second item: ' . $secondItem . PHP_EOL;

Output

Second item: Another item

Popping from the stack

$poppedItem = $stack->pop();
echo 'Popped item: ' . $poppedItem . PHP_EOL;

$stackSize = $stack->size();
echo 'Stack size: ' . $stackSize . PHP_EOL;

Output

Popped item: 8.12
Stack size: 4

Updating stacked values

Updating the last item

$lastItem = $stack
	->set('9.12')
	->get();
echo 'Updated last item: ' . $lastItem . PHP_EOL;

Output

Updated last item: 9.12

Updating an item by index

$thirdItem = $stack
	->set('Third item', 2)
	->get(2);
echo 'Updated third item: ' . $thirdItem . PHP_EOL;

Output

Updated third item: Third item

Removing from the stack

echo 'Stack size: ' . $stack->size() . PHP_EOL;
$stack->delete(1);
echo 'Stack size: ' . $stack->size() . PHP_EOL;

Output

Stack size: 4
Stack size: 3

Iterating over the stack

Using foreach

foreach ($stack as $stackItemKey => $stackItemValue) {
	echo 'Stack item ' . $stackItemKey . ': ' . $stackItemValue . PHP_EOL;
}

Output

Stack item 0: Item
Stack item 1: Third item
Stack item 2: 9.12

Using for

for ($i = 0, $n = $stack->size(); $i < $n; $i++) {
	echo 'Stack index ' . $i . ': ' . $stack->get($i) . PHP_EOL;
}

Output

Stack index 0: Item
Stack index 1: Third item
Stack index 2: 9.12

---

Contribution

Contributing to our projects is always very appreciated.
But: please follow the contribution guidelines written down in the CONTRIBUTING.md document.

License

PHP Stack Util is under the MIT license.