PHP | ftp_chdir() function

<?php

// Connect to FTP server

// Use a correct ftp server
$ftp_server = "localhost";

// Use correct ftp username
$ftp_username="username";

// Use correct ftp password corresponding
// to the ftp username
$ftp_userpass="password";
 
// Establishing ftp connection 
$ftp_connection = ftp_connect($ftp_server) 
        or die("Could not connect to $ftp_server");

if($ftp_connection) {
    echo "successfully connected to the ftp server!";
    
    // Logging in to established connection with
    // ftp username password
    $login = ftp_login($ftp_connection, $ftp_username, $ftp_userpass);
    
    if($login) {
        
        // Checking whether logged in successfully or not
        echo "<br>logged in successfully!";
        
        // ftp_chdir() changing current directory to "htdocs"
        // remember, you must have folder that will use inside
        // current directory of ftp server. 
        // Here htdocs folder exists in ftp server inside
        // base or root directory
        if (ftp_chdir($ftp_connection, "htdocs")) {
            echo "<br>Current directory successfully changed to htdocs.";
        }
        else {
            echo "<br>Error while changing current directory.";
        }
    }
    else {
        echo "<br>login failed!";
    }
    
    // Closing  connection
    if(ftp_close($ftp_connection)) {
        echo "<br>Connection closed Successfully!";
    } 
}
?>