upload-field.inc.php

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<?php
class UploadField extends AbstractField
{
    protected $dir = ''; 

    public function __set($name, $value)
    {
        if($name == 'dir')
            $this->dir = $value;
        else
            parent::__set($name, $value);
    }

    public function drawInput()
    {
        $maxSize = min($this->returnBytes(ini_get('upload_max_filesize')), $this->returnBytes(ini_get('post_max_size')));
        echo <<<EOHTML
        <input type="file" name="$this->name" size="30">
        <input type="hidden" name="MAX_FILE_SIZE" value="$maxSize"/>
EOHTML;
    }


    public function validate()
    {
        //was there an error?
        if($_FILES[$this->name]['error'])
        {
            if($_FILES[$this->name]['error'] == 4 && $this->required)
            {
                $this->hasError = true;
                $this->errorMessage = "There was an error with the $this->title field.";
                return;
            }
        }
        
        //is it required?
        if($this->required && !$_FILES[$this->name])
        {
            $this->errorMessage = "The $this->title field is required.";
            $this->hasError = true;
            return;
        }

        //set our data.
        $this->setFromRequest();

        //check our directory stuff.
        if(!$this->dir)
            throw new Exception("UploadField destination directory is not set (Pass the 'dir' option when you add the field).");
        elseif(!is_writable($this->dir))
            throw new Exception("UploadField directory ($this->dir) is not writable.");
        //finally move it!
        move_uploaded_file($_FILES[$this->name]['tmp_name'], $this->dir . '/' . $_FILES[$this->name]['name']);

        $this->hasError = false;
    }


    public function setFromRequest()
    {
        $this->value = $_FILES[$this->name]['name'];
    }


    protected function returnBytes($val)
    {
       $val = trim($val);
       $last = strtolower($val{strlen($val)-1});

       switch($last)
       {
           // The 'G' modifier is available since PHP 5.1.0
           case 'g':
               $val *= 1024;
           case 'm':
               $val *= 1024;
           case 'k':
               $val *= 1024;
       }

       return $val;
    }
}
?>

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