PHP 登录 FTP 服务器

//Example #1 ftp_login() 例子<?php$ftp_server = "ftp.example.com";$ftp_user = "foo";$ftp_pass = "bar";// set up a connection or die$conn_id = ftp_connect($ftp_server) or die("Couldn't connect to $ftp_server");// try to loginif (@ftp_login($conn_id, $ftp_user, $ftp_pass)) {    echo "Connected as $ftp_user@$ftp_server ";} else {    echo "Couldn't connect as $ftp_user ";}?> 

<?phpfunction ftp_parse_response($response, &$errstr) {    if(!is_array($response)) {        $errstr    = 'Parameter $response must be an array';         return false;    }            foreach($response as $r) {        $code    = substr(trim($r),0,3);        if(!is_numeric($code)) {            $errstr    = "$code is not a valid FTP code",$code);        }                    if($code > 400) {            $errstr    = $r;            return false;        }    }            return true;}$user = "user";$pass = "password";$host = "ftp.example.com";$proxyuser = "proxyuser";$proxypass = "proxypass";$proxyhost = "ftp.proxy.com";$conn_id = ftp_connect($proxyhost);if(!$conn_id) {    die("cannot connect to proxy");}$commands   = array(    "USER ".$user."@".$host." ".$proxyuser,    "PASS ".$pass,    "PASS ".$proxypass);foreach($commands as $c) {    $ret    = ftp_raw($conn_id,$c);    //you can write your own ftp_parse_response func that     //use an array of string as input    if(!ftp_parse_response($ret,$errstr)) {        ftp_close($conn_id);        die("cannot login to $host");    }}echo "ok, now connected";?>