ftp_chdir()

(PHP 4, PHP 5, PHP 7)

在 FTP 服务器上改变当前目录

说明

ftp_chdir(resource $ftp_stream,string $directory): bool

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

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); 
?>

参见

ftp_cdup()切换到当前目录的父目录
ftp_pwd()返回当前目录名

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;
  }    
} 
?>

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.]