Tìm hiểu về hàm ftp_chdir() trong PHP

<?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!";
	}
}
?>