摘要:PHP-CI 檔案上傳
參考網址：
File Uploading 類別
http://codeigniter.org.tw/user_guide/libraries/file_uploading.html
CodeIgniter文件上传错误：the filetype you are attempting to upload is not allowed
http://www.php230.com/codeigniter-upload-file-error-the-filetype-you-are-attempting-to-upload-is-not-allowed.html
分享CodeIgniter上传图片成功的全过程
http://www.cnblogs.com/ly312/archive/2011/06/21/2086167.html
html頁面
<form > 標籤要加上enctype="multipart/form-data"
要建立input
<input name="file_path" type="file" id="file_path">
PHP程式
建立upload config
$config['upload_path'] = './upload/'; //存放路徑
$config['allowed_types'] = '*'; //允許所有副檔名
$config['overwrite'] = true;
$config['file_name'] = time(); //文件名不使用原始名 (避免中文檔名錯誤)
$this->load->library('upload',$config);
$field_name = "file_path";
if (!$this->upload->do_upload($field_name)) {
//失敗
echo $this->upload->display_errors();
} else {
//成功
$file_data = $this->upload->data();
echo json_encode($file_data);
}