/**
* 生成图像
*
* @param string $phrase
* @return resource
* @throws Exception
*/
public function generateImage($phrase = null)
{
null == $phrase && ($phrase = $this->generatePhrase());
extract($this->_options);
//解出参数到变量
$image = $this->_createImage();
//创建图像
$defaultSize = min($width, $height * 2) / (strlen($phrase) + 1);
$spacing = (int) ($width * 0.9 / strlen($phrase));
empty($fonts) && ($fonts = YUN_Io::scan(strip($fontDir)));
if (empty($fonts)) {
throw new Exception('未找到任何有效的字体文件');
}
for ($i = 0, $strlen = strlen($phrase); $i < $strlen; $i++) {
$font = $fontDir . '/' . $fonts[array_rand($fonts)];
$color = imagecolorallocate($image, mt_rand(0, 160), mt_rand(0, 160), mt_rand(0, 160));
$angle = mt_rand(-30, 30);
$size = $defaultSize / 10 * mt_rand(12, 14);
$box = imageftbbox($size, $angle, $font, $phrase[$i]);
$x = $spacing / 4 + $i * $spacing + 2;
$y = $height / 2 + ($box[2] - $box[5]) / 4;
imagefttext($image, $size, $angle, $x, $y, $color, $font, $phrase[$i]);
}
$this->_image = $image;
return $this->_image;
}
/**
* 删除分类
* @param integer $cateId
* @throws Exception
*/
public function cateDel($cateId)
{
$where = $this->db->quoteInto('cate_id=?', $cateId);
$cateInfo = $this->cateInfoSql($where);
if (empty($cateInfo)) {
throw new Exception('指定的分类不存在');
}
if (!$cateInfo['allow_delete']) {
throw new Exception('该分类被设置为禁止删除');
}
$abspath = $this->fileBasePath . "/" . $cateInfo['filepath'];
if (is_dir($abspath)) {
$files = YUN_Io::scan($abspath);
if (!empty($files)) {
throw new Exception('分类目录不为空，无法删除');
}
rmdir($abspath);
}
$this->db->delete('file_category', $where);
$this->db->delete('file', $where);
}
