ftp_systype can be a good way of checking the state of a connection, since PHP doesn't have a better system to check the state of an ftp connection (is_connected would be nice).
if (!($type = ftp_systype($conn_id))) {
echo "FTP connection has failed! Trying again.\n";
$conn_id = ftp_connect($ftp_server);
$login_result = ftp_login($conn_id, $ftp_user, $ftp_pass);
}
ftp_systype
(PHP 4, PHP 5, PHP 7, PHP 8)
ftp_systype — 返回远程 FTP 服务器的操作系统类型
返回值
返回远程服务器类型，发生错误则返回 false。
更新日志
| 版本 | 说明 |
|---|---|
| 8.1.0 |
现在 ftp 参数接受 FTP\Connection
实例，之前接受 resource。
|
示例
示例 #1 ftp_systype() 示例
<?php
// 建立 ftp 连接
$ftp = ftp_connect('ftp.example.com');
ftp_login($ftp, 'user', 'password');
// 获取操作系统类型
if ($type = ftp_systype($ftp)) {
echo "Example.com 的操作系统为 $type\n";
} else {
echo "无法获取操作系统类型";
}
?>以上示例的输出类似于：
Example.com 的操作系统为 UNIX
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User Contributed Notes 1 note
Buckwheat469 at hotmail dot com ¶
18 years ago
