ftp_chdir
(PHP 4, PHP 5, PHP 7, PHP 8)
ftp_chdir — 在 FTP 服务器上改变当前目录
说明
ftp_chdir(resource
$ftp_stream, string $directory): bool将当前目录切换为指定的目录。
参数
-
ftp_stream -
FTP 连接的标识符。
-
directory -
目标目录。
返回值
成功时返回 true， 或者在失败时返回 false。如果切换目录失败，PHP 还会发出一条警告。
范例
示例 #1 ftp_chdir() 例子
<?php
// set up basic connection
$conn_id = ftp_connect($ftp_server);
// login with username and password
$login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);
// check connection
if ((!$conn_id) || (!$login_result)) {
die("FTP connection has failed !");
}
echo "Current directory: " . ftp_pwd($conn_id) . "\n";
// try to change the directory to somedir
if (ftp_chdir($conn_id, "somedir")) {
echo "Current directory is now: " . ftp_pwd($conn_id) . "\n";
} else {
echo "Couldn't change directory\n";
}
// close the connection
ftp_close($conn_id);
?>
add a note
User Contributed Notes 2 notes
neil at 11 out of 10 ¶
14 years ago
Thanks to h3 at valleyfield dot net
Same function with some minor changes and comments added
FTP function checks if a directory exists
<?php
function ftp_is_dir( $dir ) {
global $ftpcon;
// get current directory
$original_directory = ftp_pwd( $ftpcon );
// test if you can change directory to $dir
// suppress errors in case $dir is not a file or not a directory
if ( @ftp_chdir( $ftpcon, $dir ) ) {
// If it is a directory, then change the directory back to the original directory
ftp_chdir( $ftpcon, $original_directory );
return true;
}
else {
return false;
}
}
?>
info at swiftyexpress dot com ¶
13 years ago
Works like the other functions in this page's notes, but this one doesn't make use of a global FTP connection, so it takes parameters like the other functions in the extension
<?php
function ftp_directory_exists($ftp, $dir)
{
// Get the current working directory
$origin = ftp_pwd($ftp);
// Attempt to change directory, suppress errors
if (@ftp_chdir($ftp, $dir))
{
// If the directory exists, set back to origin
ftp_chdir($ftp, $origin);
return true;
}
// Directory does not exist
return false;
}
?>
[NOTE BY danbrown AT php DOT net: As the contributor mentions, the original function was noted here by (h3 AT valleyfield DOT net) on 13-JUL-2007.]