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How to Connect to an FTP Server with Implicit SSL/TLS using PHP

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The PHP manual lacks good documentation on how to use cURL to connect to an FTP server with Implicit SSL/TLS, so here’s an example from a recent project. It’s very basic and is only designed to connect and upload an ASCII file, but it should help you get started. The libcurl Guide is very helpful in learning exactly what options actually do, as sometimes the PHP manual can be a bit light on specifics.

Here’s some things to note:

  • cURL will try to use passive mode by default – this can be disabled by forcing active mode with CURLOPT_FTPPORT
  • You can relax the SSL requirement using CURLOPT_FTP_SSL, which controls whether SSL is used on either the control or data connections, or both.
  • This class allows cURL to choose which authentication method to use, either SSL or TLS. You can force either using CURLOPT_FTPSSLAUTH.

The post How to Connect to an FTP Server with Implicit SSL/TLS using PHP appeared first on Max Rice.


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