/**
* 输出校验码图片二进制
* @param int $length 输出几个字符
* @param int $width 图片宽度
* @param int $height 图片高度
*
*/
public function image($length = 5, $width = 200, $height = 60, $minFontSize = 12, $maxFontSize = 16)
{
$fonts = array(_PLUGIN_ . 'Captcha/VeraBd.ttf', _PLUGIN_ . 'Captcha/VeraIt.ttf', _PLUGIN_ . 'Captcha/Vera.ttf');
$this->_captcha = new PhpCaptcha($fonts, $width, $height);
$this->_captcha->SetMinFontSize($minFontSize);
$this->_captcha->SetMaxFontSize($maxFontSize);
$this->_captcha->UseColour(true);
$this->_captcha->SetNumChars($length);
$this->_captcha->Create();
}
