How can the correct path be determined to upload a file when receiving the error message "Warning: ftp_chdir() expects parameter 1 to be resource, boolean given" in PHP?

To solve the error "Warning: ftp_chdir() expects parameter 1 to be resource, boolean given" in PHP, you need to ensure that the FTP connection resource is properly established before trying to change directories. This error occurs when the ftp_chdir() function is expecting a valid FTP connection resource, but is instead receiving a boolean value (typically false) due to a failed connection attempt. To fix this, you should check if the FTP connection is successful before attempting to change directories. 

<?php
// Connect to FTP server
$ftp_server = "ftp.example.com";
$ftp_username = "username";
$ftp_password = "password";

$conn_id = ftp_connect($ftp_server);
if (!$conn_id) {
    die("Failed to connect to FTP server");
}

// Login to FTP server
$login_result = ftp_login($conn_id, $ftp_username, $ftp_password);
if (!$login_result) {
    die("Failed to login to FTP server");
}

// Change directory
$remote_dir = "public_html";
if (ftp_chdir($conn_id, $remote_dir)) {
    echo "Changed directory successfully";
} else {
    echo "Failed to change directory";
}

// Close FTP connection
ftp_close($conn_id);
?>

Keywords

ftp_chdir resource boolean file upload error message

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