An easy example of IteratorAggregate implementation.

Csv.php

<?php
/**
 * Csv file iterator.
 * An easy example of IteratorAggregate implementation.
 * Iteration logics are provided by SplFileObject.
 *
 * @author Yuya Takeyama <sign.of.the.wolf.pentagram@gmail.com>
 */
class Csv implements IteratorAggregate
{
    /**
     * Filename
     *
     * @var string
     */
    protected $_filename;

    /**
     * Constructor
     *
     * @param  array $filename
     */
    public function __construct($filename)
    {
        $this->_filename = $filename;
    }

    /**
     * Gets iterator object.
     *
     * @return SplFileObject
     */
    public function getIterator()
    {
        $file = new SplFileObject($this->_filename, 'r');
        $file->setFlags(SplFileObject::DROP_NEW_LINE | SplFileObject::SKIP_EMPTY | SplFileObject::READ_CSV);
        return $file;
    }
}

example.csv

example.php

<?php
require_once './Csv.php';
$csv = new Csv('./example.csv');
foreach ($csv as $line) {
    var_dump($line);
}