dbareader.inc

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<?php

class DbaReader implements Iterator
{

    protected $db = NULL;
    private $key = false;
    private $val = false;

    function __construct($file, $handler) {
        if (!$this->db = dba_open($file, 'r', $handler)) {
            throw new exception('Could not open file ' . $file);
        }
    }
    
    function __destruct() {
        dba_close($this->db);
    }

    function rewind() {
        $this->key = dba_firstkey($this->db);
        $this->fetch_data();
    }

    function next() {
        $this->key = dba_nextkey($this->db);
        $this->fetch_data();
    }

    private function fetch_data() {
        if ($this->key !== false) {
            $this->val = dba_fetch($this->key, $this->db);
        }
    }

    function current() {
        return $this->val;
    }

    function valid() {
        if ($this->db && $this->key !== false) {
            return true;
        } else {
            return false;
        }
    }

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

?>