CsvReader.php

<?php
/**
 * @author nimmneun
 * @since 02.07.2015 22:31
 */
class CsvReader
{
    private $delimiter;
    private $enclosure;
    private $escape;
    private $lines;
    private $index;

    public static function load($input, $delimiter = null, $enclosure = null, $escape = null)
    {
        $reader = new self;
        $reader->delimiter = $delimiter;
        $reader->enclosure = $enclosure;
        $reader->escape = $escape;
        $reader->readLines($input);

        return $reader;
    }

    private function readLines($input)
    {
        if (strlen($input) < 512 && is_file($input)) {
            $this->lines = file($input);
        } else {
            $this->lines = preg_split('/[\r\n]{1}[\n]{0,1}/', $input);
        }
    }

    private function lineToRow($index)
    {
        return isset($this->lines[$index])
            ? array_map('trim', str_getcsv(trim($this->lines[$index]), $this->delimiter, $this->enclosure, $this->escape))
            : false;
    }

    public function next()
    {
        return count($this->lines) > $this->index
            ? $this->lineToRow(++$this->index)
            : $this->lineToRow($this->index);
    }

    public function prev()
    {
        return 0 < $this->index
            ? $this->lineToRow(--$this->index)
            : false;
    }

    public function filter()
    {
        $this->lines = array_values(array_filter($this->lines));

        return $this;
    }

    public function offset($offset)
    {
        $this->index += null === $this->index ? $offset-1 : $offset;

        return $this;
    }

    public function rewind()
    {
        $this->index = null;

        return $this;
    }

    public function getLineNo()
    {
        return null === $this->index ? 1 : $this->index+1;
    }

    public function getIndexNo()
    {
        return null === $this->index ? 0 : $this->index;
    }

    public function getLineCount()
    {
        return count($this->lines);
    }
}