/**
* Generate captcha
*
* @return string captcha ID
*/
public function generate()
{
$id = parent::generate();
$tries = 5;
// If there's already such file, try creating a new ID
while ($tries-- && file_exists($this->getImgDir() . $id . $this->getSuffix())) {
$id = $this->_generateRandomId();
$this->_setId($id);
}
$this->_generateImage($id, $this->getWord());
if (mt_rand(1, $this->getGcFreq()) == 1) {
$this->_gc();
}
return $id;
}
/**
* Generate new captcha
*
* @return string
*/
public function generate()
{
$this->useNumbers = false;
return parent::generate();
}