How can PHP be used to create a stack data structure for storing values?

To create a stack data structure in PHP for storing values, we can utilize the built-in array functions to mimic the behavior of a stack. We can use array_push() to add elements to the top of the stack, array_pop() to remove elements from the top of the stack, and count() to get the number of elements in the stack. 

class Stack {
    private $stack;

    public function __construct() {
        $this->stack = [];
    }

    public function push($value) {
        array_push($this->stack, $value);
    }

    public function pop() {
        if (!$this->isEmpty()) {
            return array_pop($this->stack);
        }
    }

    public function isEmpty() {
        return empty($this->stack);
    }

    public function size() {
        return count($this->stack);
    }
}

// Example usage
$stack = new Stack();
$stack->push(5);
$stack->push(10);
$stack->push(15);

echo $stack->pop(); // Output: 15
echo $stack->pop(); // Output: 10
echo $stack->size(); // Output: 1

Keywords

PHP stack data structure array_push array_pop LIFO

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