簡單整理一下PHP項目整合PayPal支付功能。

一、表單的構建：

<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="商家賬號"/>

<input type="hidden" name="return" value="返回網址"/>

<input type="hidden" name="cancel_return" value="取消返回網址"/>

<input type="hidden" name="notify_url" value="用于接收PayPal發送的即時付款通知的URL，必須是有效的URL"/>

<input type="hidden" name="item_name" value="物品名稱"/>

<input type="hidden" name="item_number" value="可用于跟蹤購買或捐贈的傳遞變量，在付款完成時傳回給您"/>

<input type="hidden" name="amount" value="物品的價格（購物車中所有物品的總價格"/>

<input type="hidden" name="currency_code" value="幣種"/>

</form>

二、IPN驗證部分

<?php

class paypal {

var $ipn_data = array(); // array contains the POST values for IPN

var $fields = array(); // 提交給Paypal的表單參數，例：item_name=iPhone 6,quantity=1,amount=499,currency_code=USD等所有表單信息，

//　在調用驗證IPN之前事先需要初始化好

var $paypal_url = 'https://www.paypal.com/cgi-bin/webscr';//sandbox：https://www.sandbox.paypal.com/cgi-bin/webscr

function validate_ipn() {//驗證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=_notify-validate"; // append ipn command

// open the connection to paypal

$fp = fsockopen($url_par[host],"80",$errnum,$errstr,30);

if(!$fp) {

// could 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/r/n");

fputs($fp, $post_str . "/r/n/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;

}

}

}

?>

以上所述就是本文的全部內容了，希望大家能夠喜歡。