A little csv reader class for php

CSVReader.php

<?php

class CSVReader implements SeekableIterator
{
	const DEFAULT_DELIMITER = ',';

	const DEFAULT_ENCLOSURE = '"';

	const DEFAULT_ESCAPE = '\\';

	protected $file;

	protected $header = [];

	protected $key = 0;

	protected $isAssociative = false;

	public function __construct ($file, $associative = false) {

		if (! file_exists($file)) {

			throw new Exception("{$file} File not found");
		}

		$this->file = new SplFileObject($file, 'r');

		$this->isAssociative = $associative;

		$this->rewind();
	}

	public function setControl(
		$delimiter = self::DEFAULT_DELIMITER,
		$enclosure = self::DEFAULT_ENCLOSURE,
		$escape    = self::DEFAULT_ESCAPE
	) {

		return $this->file->setCsvControl($delimiter, $enclosure, $escape);
	}

	public function useAsAssociative($associative)
	{
		$this->isAssociative = $associative;
	}

	public function current()
	{
		if ($this->isAssociative == true) {

			return $this->combined();
		}

		return $this->file->fgetcsv();
	}

	protected function combined()
	{
		$line = $this->file->fgetcsv();

		$header = $this->header;

		$combined = [];

		$i  = 0;

		if (count($header) >= count($line)) {

			foreach ($header as $key => $value) {
				
				$combined[$value] = isset($line[$key]) ? $line[$key] : NULL;

			}

		} else {

			foreach ($line as $key => $value) {

				$index = isset($header[$key]) ? $header[$key] : $i++;

				$combined[$index] = $value;
			}

		}

		return $combined;
	}

	public function key()
	{
		return $this->file->key();
	}

	public function next()
	{
		$this->file->next();
	}

	public function valid()
	{
		return $this->file->valid();
	}

	public function rewind()
	{
		$this->file->rewind();

		if ($this->isAssociative) {
			
			$this->header = array_filter($this->file->fgetcsv());
		}

	}

	/**
	 * @param int $position
	 * */
	public function seek($position)
	{
		$this->file->seek($position);
	}
}