SWFUpload与CI不能正确上传识别文件MIME类型解决方法分享

//Edit By Tacker
if(function_exists('mime_content_type')){
$this->file_type = preg_replace("/^(.+?);.*$/", "//1", mime_content_type($this->file_temp));
}else{
$this->file_type = preg_replace("/^(.+?);.*$/", "//1", $_FILES[$field]['type']);
}