跟之前”以 PHP 實現 POP3 authentication“差不多
這次打算借用 FTP 既有的認證機制!!
藉由判別 response message 來達到認證的目的!!
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| <?php | |
| function CheckFTP($server, $id, $passwd, $port = 21) | |
| { | |
| //若任一欄位為空白則無效 | |
| if (empty($server) || empty($id) || empty($passwd)) | |
| return false; | |
| //連結FTP Server | |
| $fs = fsockopen ($server, $port, &$errno, &$errstr, 5); | |
| //檢查是否連線 | |
| if (!$fs) | |
| return false; | |
| //connected.. | |
| $msg = fgets($fs,256); | |
| //step 1. 傳送帳號 | |
| fputs($fs, "USER $id\r\n"); | |
| $msg = fgets($fs,256); | |
| if (strpos($msg,"331")===false) | |
| return false; | |
| //step 2. 傳送密碼 | |
| fputs($fs, "PASS $passwd\r\n"); | |
| $msg = fgets($fs,256); | |
| if (strpos($msg,"230")===false) | |
| return false; | |
| //step 3.通過認證 QUIT | |
| fputs($fs, "QUIT \r\n"); | |
| fclose($fs); | |
| return true; | |
| } | |
| ?> |
Basic FTP Command:
- USER 帳號
- PASS 密碼
- DELE 刪除
- QUIT 離線