<?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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