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collectionPHP collection library

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collectionPHP collection library

<?php
namespace Cake\Collection;
use ArrayIterator;
use InvalidArgumentException;
use IteratorIterator;
use LogicException;
use Serializable;
use Traversable;
class Collection extends IteratorIterator implements CollectionInterface, Serializable
{
    use CollectionTrait;
    /**
     * Constructor. You can provide an array or any traversable object
     *
     * @param array|\Traversable $items Items.
     * @throws \InvalidArgumentException If passed incorrect type for items.
     */
    public function __construct($items)
    {
        if (is_array($items)) {
            $items = new ArrayIterator($items);
        }
        if (!($items instanceof Traversable)) {
            $msg = 'Only an array or \Traversable is allowed for Collection';
            throw new InvalidArgumentException($msg);
        }
        parent::__construct($items);
    }

This is the syntax for obtaining a collection and the collection library for obtaining the database. A collection is equivalent to a table.

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