PHP integrated PayPal payment

As the most widely used online payment tool in the world, PayPal has always been the preferred payment tool for many foreign trade B2C websites. However, for merchants who develop their own websites, the integration of the PayPal interface often encounters many problems. Today, Lance will share with you the integration method of the PayPal interface in the php project. Simply sort out the PHP project and integrate the PayPal payment function.

1. form construction:

II. IPN verification

<? Phpclass paypal {var $ ipn_data = array (); // array contains the POST values for IPN var $ fields = array (); // form parameters submitted to Paypal, for example: item_name = iPhone 6, quantity = 1, amount = 499, currency_code = USD, and other form information. // you must initialize var $ paypal_url = 'before calling IPN verification' https://www.paypal.com/cgi-bin/webscr '; // Sandbox: https://www.sandbox.paypal.com/cgi-bin/webscr Function validate_ipn () {// verify IPN // parse the paypal URL $ url_par = parse_url ($ this-> paypal_url ); // generate the post string from the _ POST vars aswell as load the // _ POST vars into an arry so we can play with them from the calling // script. $ post_str = ''; foreach ($ _ POST as $ field => $ value) {$ this-> ipn_data [" $ field "] = $ value; $ post_str. = $ field. '= '. urlencode (stripslashes ($ value )). '&';} $ post _ Str. = "cmd = _ policy-validate"; // append ipn command // open the connection to paypal $ fp = fsockopen ($ url_par [host], "80", $ errnum, $ errstr, 30); if (! $ Fp) {// cocould not open the connection. return false;} else {// Post the data back to paypal fputs ($ fp, "POST ". $ url_par [path]. "HTTP/1.1 \ r \ n"); fputs ($ fp, "Host :". $ url_par [host]. "\ r \ n"); fputs ($ fp, "Content-type: application/x-www-form-urlencoded \ r \ n"); fputs ($ fp, "Content-length :". strlen ($ post_str ). "\ r \ n"); fputs ($ fp, "Connection: close \ r \ n"); fputs ($ fp, $ post_str. "\ r \ n"); // loop Through the response from the server and append to variable while (! Feof ($ fp) {$ this-> validate_ipn_response. = fgets ($ fp, 1024);} fclose ($ fp); // close connection} if (eregi ("VERIFIED", $ this-> validate_ipn_response )) {return true;} else {return false ;}}}?>

The above is all the content of this article. I hope you will like it.