Simple CSV iterator

CSVIterator.php

<?php

class CSVIterator extends SPLFileObject
{
    protected $first_row = true;
    protected $columns;
    
    public function __construct ($filename, $delimiter = ',')
    {
        parent::__construct($filename);
        $this->setFlags(SPLFileObject::READ_CSV);
        $this->setCsvControl($delimiter);
    }
    
    public function current()
    {
        // Set the column names if first row
        // FIXME: assumes the first row is a header
        if ($this->first_row) {
            $this->first_row = false;
            $this->columns = parent::current();
            $this->next();
        }

        $row_data = parent::current();

        // Stop at end of file
        if (!$this->valid()) {
            return;
        }
        
        return array_combine($this->columns, $row_data);
    }
    
}

// Test
$file = new CSVFile('testset.csv');

foreach($file as $idx => $row) {
    if ($idx % 10000 == 0) {
        echo '.';
    }
}

echo PHP_EOL;