How to Troubleshoot ftp_put Failures in PHP

Troubleshooting ftp_put Failures in PHP

PHP's ftp_put function can fail for various reasons, but one common issue is the default use of active mode.

Switching to Passive Mode

The active mode in PHP can often lead to connectivity issues. To resolve this, switch to passive mode using the ftp_pasv function:

<code class="php">$connect = ftp_connect($ftp) or die("Unable to connect to host");
ftp_login($connect, $username, $pwd) or die("Authorization failed");
// Set passive mode
ftp_pasv($connect, true) or die("Unable switch to passive mode");</code>

Ensure that you call ftp_pasv after successfully logging in with ftp_login.

Incorrect IP Address in Server Response

If your FTP server provides an incorrect IP address in response to the PASV command, you may need to disable the use of the PASV address:

<code class="php">ftp_set_option($connect, FTP_USEPASVADDRESS, false);</code>

However, it's advisable to resolve this issue with the server itself.

Additional Considerations

• Ensure that the destination directory exists on the FTP server before attempting to upload the XML file.
• Check the permissions of the destination directory to ensure you have write access.
• Verify that the XML file is well-formed and contains valid XML data.

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