PHP | ftp_size() function

The ftp_size() function is an inbuilt function in PHP which is used to get the size of a given file on FTP server.
Syntax: 

ftp_size( $ftp_connection, $file_name );

Parameter: This function accepts two parameters as mentioned above and described below: 

• $ftp_connection: It is required parameter. It specifies the already existing FTP connection to use where the file exists.
• $file_name: It is required parameter. It specifies the file or file path on remote server i.e. FTP server.

Return Value: It returns the size of file on success or -1 on error.
Note:

• All ftp server doesn’t support this function.
• This function is available on PHP 4.0.0 and newer version.
• The following examples cannot be run on online IDE. So try to run in some PHP hosting server or localhost with proper ftp server name.

Below examples illustrate the ftp_size() function in PHP:
Example 1:

php

<?php

// Connect to FTP server

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

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

// Use correct ftp password corresponding
// to the ftp username
$ftp_userpass="user";

// File name or path to upload to ftp server
$file = "shiva.jpg";

// 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!";

        // Size of the file using ftp_size() function.
        $file_size = ftp_size($ftp_connection, $file);

        if ($file_size != -1) {
            echo "<br>$file is $file_size bytes.";
        }
        else {
            echo "<br>Error getting file size.";
        }
    }
    else {
        echo "<br>login failed!";
    }

    // echo ftp_get_option($ftp_connection, 1);
    // Closing  connection
    if(ftp_close($ftp_connection)) {
        echo "<br>Connection closed Successfully!";
    }
}

?>

Output:

Example 2: Connect to ftp server using port number 21. 

php

<?php

// Connect to FTP server

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

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

// Use correct ftp password corresponding
// to the ftp username
$ftp_userpass="user";

// File name or path to upload to ftp server
$file = "shiva.jpg";

// Establishing ftp connection
$ftp_connection = ftp_connect($ftp_server, 21)
    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!";

        // Size of the file using ftp_size() function.
        $file_size = ftp_size($ftp_connection, $file);

        if ($file_size != -1) {
            echo "<br>$file is $file_size bytes.";
        }
        else {
            echo "<br>Error getting file size.";
        }
    }
    else {
        echo "<br>login failed!";
    }

    // echo ftp_get_option($ftp_connection, 1);
    // Closing  connection
    if(ftp_close($ftp_connection)) {
        echo "<br>Connection closed Successfully!";
    }
}

?>

Output:

Reference: https://www.php.net/manual/en/function.ftp-size.php