php - Paypal类文件错误

Question

我的网站出现错误，这是错误消息“ fatal error :无法在第 123 行的 paypal.class.php 中重新分配自动全局变量 _POST”。它实际上是一个用于paypal 支付的类文件。我真的不知道如何解决这个问题，因为 paypal.class.php 文件只是下载的，我不是代码的作者。任何帮助将不胜感激。提前致谢! :)

class Paypal {

private $VARS;
private $button;
private $logFile;
private $isTest=false;

/* Print Form as Link */
function getLink()
{
    $url = $this->getPaypal();
    $link = 'https://'.$url.'/cgi-bin/webscr?';
    foreach($this->VARS as $item => $sub){
        $link .= $sub[0].'='.$sub[1].'&';
    }
    return $link;
}

/* Print Form */
function showForm()
{
    $url = $this->getPaypal();
    $FORM  = '<form action="https://'.$url.'/cgi-bin/webscr" method="post" target="_blank" style="display:inline;">'."\n";

    foreach($this->VARS as $item => $sub){
        $FORM .= '<input type="hidden" name="'.$sub[0].'" value="'.$sub[1].'">'."\n";
    }

    $FORM .= $this->button;    
    $FORM .= '</form>';
    echo $FORM;
}

/* Add variable to form */
function addVar($varName,$value)
{
    $this->VARS[${varName}][0] = $varName;
    $this->VARS[${varName}][1] = $value;
}

/* Add button Image */
function addButton($type,$image = NULL)
{
    switch($type)
    {
        /* Buy now */
        case 1:
            $this->button = '<input type="image" height="21" style="width:86;border:0px;"';
            $this->button .= 'src="https://www.paypal.com/en_US/i/btn/btn_paynow_SM.gif" border="0" name="submit" ';
            $this->button .= 'alt="PayPal - The safer, easier way to pay online!">';
            break;
        /* Add to cart */   
        case 2:
            $this->button = '<input type="image" height="26" style="width:120;border:0px;"';
            $this->button .= 'src="https://www.paypal.com/en_US/i/btn/btn_cart_LG.gif" border="0" name="submit"';
            $this->button .= 'alt="PayPal - The safer, easier way to pay online!">';
            break;
        /* Donate */    
        case 3:
            $this->button = '<input type="image" height="47" style="width:122;border:0px;"';
            $this->button .= 'src="https://www.paypal.com/en_US/i/btn/btn_donateCC_LG.gif" border="0" name="submit"';
            $this->button .= 'alt="PayPal - The safer, easier way to pay online!">';
            break;
        /* Gift Certificate */
        case 4: 
            $this->button = '<input type="image" height="47" style="width:179;border:0px;"';
            $this->button .= 'src="https://www.paypal.com/en_US/i/btn/btn_giftCC_LG.gif" border="0" name="submit"';
            $this->button .= 'alt="PayPal - The safer, easier way to pay online!">';
            break;
        /* Subscribe */
        case 5: 
            $this->button = '<input type="image" height="47" style="width:122;border:0px;"';
            $this->button .= 'src="https://www.paypal.com/en_US/i/btn/btn_subscribeCC_LG.gif" border="0" name="submit"';
            $this->button .= 'alt="PayPal - The safer, easier way to pay online!">';
            break;
        /* Custom Button */
        default:
            $this->button = '<input type="image" src="'.$image.'" border="0" name="submit"';
            $this->button .= 'alt="PayPal - The safer, easier way to pay online!">';
    }
    $this->button .= "\n";
}

/* Set log file for invalid requests */
function setLogFile($logFile)
{
    $this->logFile = $logFile;
}

/* Helper function to actually write to logfile */
private function doLog($_POST)
{
    ob_start();
    echo '<pre>'; print_r($_POST); echo '</pre>';
    $logInfo = ob_get_contents();
    ob_end_clean();

    $file = fopen($this->logFile,'a');
    fwrite($file,$logInfo);
    fclose($file);
}

/* Check payment */
function checkPayment($_POST)
{
    /* read the post from PayPal system and add 'cmd' */
    $req = 'cmd=_notify-validate';

    /* Get post values and store them in req */
    foreach ($_POST as $key => $value) {
        $value = urlencode(stripslashes($value));
        $req .= "&$key=$value";
    }

    $url = $this->getPaypal();

    /* post back to PayPal system to validate */
    $header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
    $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
    $header .= "Content-Length: " . strlen($req) . "\r\n\r\n";
    $fp = fsockopen ('ssl://'.$url, 443, $errno, $errstr, 30);

    /*
    If ssl access gives you problem. try regular port:
    $fp = fsockopen ($url, 80, $errno, $errstr, 30);
    */

    if (!$fp) {
        /* HTTP ERROR */
        return false;
    } else {
        fputs ($fp, $header . $req);
        while (!feof($fp)) {
            $res = fgets ($fp, 1024);
            if (strcmp ($res, "VERIFIED") == 0) {

                return true;
            } else {
            if (strcmp ($res, "INVALID") == 0) {
                /*
                log for manual investigation
                */
                if($this->logFile != NULL){
                    $this->doLog($_POST);
                }
                return false;
            }
        }
        fclose ($fp);
    }
    return false;
}

/* Set Test */
function useSandBox($value)
{
    $this->isTest=$value;
}

/* Private function to get paypal url */
private function getPaypal()
{
    if($this->isTest == true){
        return 'www.sandbox.paypal.com';
    } else {
        return 'www.paypal.com';
    }
}}

Answer 1

您正在使用 $_POST 作为 doLog() 和 checkPayment() 函数的参数，您不能使用 $_POST 作为函数/方法参数，将其更改为其他变量名称，例如:

function checkPayment($my_post)
{
    /* read the post from PayPal system and add 'cmd' */
    $req = 'cmd=_notify-validate';

    /* Get post values and store them in req */
    foreach ($my_post as $key => $value) {
        $value = urlencode(stripslashes($value));
        $req .= "&$key=$value";
    }
    //rest of your code
}

并对您的 doLog() 函数进行类似的更改，例如 doLog($my_post);