PHP integrated PayPal payment

PHP integrated PayPal payment

Simply sort out the PHP project and integrate the PayPal payment function.

1. form construction:

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<Form method = "post" name = "form" action = "https://www.paypal.com/cgi-bin/webscr"> <Input type = "hidden" name = "rm" value = "2"/> <Input type = "hidden" name = "cmd" value = "_ xclick"/> <Input type = "hidden" name = "business" value = "merchant account"/> <Input type = "hidden" name = "return" value = ""/> <Input type = "hidden" name = "cancel_return" value = "cancel return URL"/> <Input type = "hidden" name = "yy_url" value = "the URL used to receive the instant payment notification sent by PayPal, which must be a valid URL"/> <Input type = "hidden" name = "item_name" value = "item name"/> <Input type = "hidden" name = "item_number" value = "can be used to track transfer variables for purchase or donation and send them back to you upon payment completion"/> <Input type = "hidden" name = "amount" value = "item price (total price of all items in the shopping cart"/> <Input type = "hidden" name = "currency_code" value = "currency"/> </Form>

Ii. IPN Verification

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<? Php Class paypal { Var $ ipn_data = array (); // array contains the POST values for IPN Var $ fields = array (); // parameters of the form submitted to Paypal, for example, item_name = iPhone 6, quantity = 1, amount = 499, currency_code = USD, etc, // Initialization is required before IPN verification is called. Var $ paypal_url = 'https: // response 　　 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 // _ 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; } } } ?>

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