https://community.developer.cybersource.com/t5/Integration-and-Testing/Direct-Post-Method-and-PHP-4-4/m-p/22259#M12062 <P>I would guess that the primary difference between 4.x and 5.x is just the class function definitions. You could theoretically try rewriting those for AuthorizeNetDPM.php, AuthorizeNetSIM.php, and the various classes they build off of in the shared folder. Short of that, you can upgrade your site to use PHP 5.x.</P><P>&nbsp;</P><P>Sadly, PHP 4.x was so long ago that even if there is a version of the SDK going back that far, it won't have DPM in it.</P> Fri, 27 Jan 2012 12:48:14 GMT TJPride 2012-01-27T12:48:14Z https://community.developer.cybersource.com/t5/Integration-and-Testing/Direct-Post-Method-and-PHP-4-4/m-p/22255#M12060 <DIV class="lia-message-body"><DIV class="lia-message-body-content"><P>I'm following the DPM dev guide and it's saying I need to use the PHP SDK. Unfortunately the SDK requires PHP 5.2+.</P><P>&nbsp;</P><P>How can I use DPM with PHP 4? Is documentation available for this?</P></DIV></DIV> Fri, 27 Jan 2012 11:08:27 GMT https://community.developer.cybersource.com/t5/Integration-and-Testing/Direct-Post-Method-and-PHP-4-4/m-p/22255#M12060 dilovorecu 2012-01-27T11:08:27Z https://community.developer.cybersource.com/t5/Integration-and-Testing/Direct-Post-Method-and-PHP-4-4/m-p/22259#M12062 <P>I would guess that the primary difference between 4.x and 5.x is just the class function definitions. You could theoretically try rewriting those for AuthorizeNetDPM.php, AuthorizeNetSIM.php, and the various classes they build off of in the shared folder. Short of that, you can upgrade your site to use PHP 5.x.</P><P>&nbsp;</P><P>Sadly, PHP 4.x was so long ago that even if there is a version of the SDK going back that far, it won't have DPM in it.</P> Fri, 27 Jan 2012 12:48:14 GMT https://community.developer.cybersource.com/t5/Integration-and-Testing/Direct-Post-Method-and-PHP-4-4/m-p/22259#M12062 TJPride 2012-01-27T12:48:14Z