How can debugging techniques in PHP be effectively utilized to troubleshoot issues with FTP file uploads in scripts?

Issue: Troubleshooting FTP file upload issues in PHP scripts can be done by utilizing debugging techniques such as error logging and checking for error messages returned by FTP functions. By carefully examining these messages, you can identify the root cause of the problem and take appropriate actions to resolve it. PHP Code Snippet: 

<?php
$ftp_server = "ftp.example.com";
$ftp_user = "username";
$ftp_pass = "password";

$local_file = "localfile.txt";
$remote_file = "remotefile.txt";

// Connect to FTP server
$conn_id = ftp_connect($ftp_server);
if (!$conn_id) {
    error_log("Failed to connect to FTP server");
    exit;
}

// Login to FTP server
$login_result = ftp_login($conn_id, $ftp_user, $ftp_pass);
if (!$login_result) {
    error_log("Failed to login to FTP server");
    exit;
}

// Upload file to FTP server
$upload_result = ftp_put($conn_id, $remote_file, $local_file, FTP_ASCII);
if (!$upload_result) {
    error_log("Failed to upload file to FTP server");
    exit;
}

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

Keywords

FTP file uploads debugging techniques PHP scripts troubleshooting

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