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  • 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

    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

    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

    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.]

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