H:/Workspace/php-axiom/www/php-axiom/libraries/axiom/axPDOStatementIterator.class.php

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<?php
class axPDOStatementIterator extends IteratorIterator implements SeekableIterator, Countable {

    protected $_statement;
    
    protected $_count;
    
    public function __construct (PDOStatement $statement) {
        parent::__construct($this->_statement = $statement);
    }
    
    public function seek ($position) {
        if ($position > $this->count() || $position < $this->key())
            throw new OutOfBoundsException("Cannot seek to $position", 2008);
            
        for ($i = $this->key(); $i < $position; $i++)
            $this->next();
    }
    
    public function count () {
        if (!isset($this->_count))
                                    return $this->_count = $this->_statement->rowCount();
                    return $this->_count;
    }
    
    public function first () {
        $this->rewind();
        return $this->valid() ? $this->current() : null;
    }
    
    public function last () {
        $this->seek($this->count());
        return $this->valid() ? $this->current() : null;
    }
}