Community Support Forums

Hello,
The S2 Member plugin has been very helpful in what I am trying to do for my site. How ever, I cant find my way around this issue.
I Configured Paypal Sandbox and generated the buttons for "Membership Signup" page.
When I tested as a logged in user, the Membership Level was still of "Free Subscriber" even after the successfull payment.
Same is the case with a Logged in Test User. The membership levels do not seem to be changing even after the payment.
Also, I am getting an error saying-

Unable to verify POST Vars


every time I make a test payment.
I have configured the PayPal® PDT Identity Token settings.
Cant understand where I made a mistake.
Please help

This may be caused by a wrong value for the custom attribute in your shortcode. Could you post here the shortcode for the button you're having trouble with?

Read this too, please viewtopic.php?f=36&t=1066

Hi,
The shortcodes are-
Button1 -
[s2Member-PayPal-Button level="1" ccaps="" desc="Monthly Subscribers / description and pricing details here." ps="paypal" cc="USD" ns="1" custom="www.rfpbook.0fees.net" ta="0" tp="0" tt="D" ra="5" rp="1" rt="M" rr="0" image="default" output="button" /]

Button 2-
[s2Member-PayPal-Button level="2" ccaps="" desc="Annual Subscriber / description and pricing details here." ps="paypal" cc="USD" ns="1" custom="www.rfpbook.0fees.net" ta="0" tp="0" tt="D" ra="10" rp="3" rt="M" rr="0" image="default" output="button" /]

And now, I generated a single One time payment option for which I generated a code directly from paypal sandbox. The code is-
<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="TLGV8FPR4XSEW">
<input type="image" src="https://www.sandbox.paypal.com/WEBSCR-640-20110429-1/en_US/i/btn/btn_paynow_SM.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.sandbox.paypal.com/WEBSCR-640-20110429-1/en_US/i/scr/pixel.gif" width="1" height="1">
</form>

Thanks.

And which one was that you had the error with?

Getting the Same error with all of them.
In fact, I am ready to change my billing model from recurring to One time (the last button), but the error is still there.....

Got it.

Could you please post the IPN log entries for the transactions that gave you trouble?

Cristián Lávaque wrote:Got it.

Could you please post the IPN log entries for the transactions that gave you trouble?

I have a file in the Logs named -

paypal-rtn.log

The entries in this file are-

www.rfpbook.0fees.net/?s2member_paypal_ ... em_number=
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.10) Gecko/20100914 Firefox/3.6.10
array (
's2member_log' =>
array (
0 => 'Unable to verify POST vars. This is most likely related to an invalid PayPal® configuration. Please check: s2Member -> PayPal® Options.',
1 => 'If you\'re absolutely SURE that your PayPal® configuration is valid, you may want to run some tests on your server, just to be sure $_POST variables are populated, and that your server is able to connect to PayPal® over an HTTPS connection.',
2 => 's2Member uses the WP_Http class for remote connections; which will try to use cURL first, and then fall back on the FOPEN method when cURL is not available. On a Windows® server, you may have to disable your cURL extension. Instead, set allow_url_fopen = yes in your php.ini file. The cURL extension (usually) does NOT support SSL connections on a Windows® server.',
3 => 'array (
\'s2member_paypal_return\' => \'1\',
\'tx\' => \'6NS08998S1337131R\',
\'st\' => \'Completed\',
\'amt\' => \'25.00\',
\'cc\' => \'USD\',
\'cm\' => \'\',
\'item_number\' => \'\',
)',
4 => 'Redirecting Customer to the Login Page, due to an error that occurred.',
),
)

www.rfpbook.0fees.net/?s2member_paypal_ ... em_number=
User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.60 Safari/534.24
array (
's2member_log' =>
array (
0 => 'Unable to verify POST vars. This is most likely related to an invalid PayPal® configuration. Please check: s2Member -> PayPal® Options.',
1 => 'If you\'re absolutely SURE that your PayPal® configuration is valid, you may want to run some tests on your server, just to be sure $_POST variables are populated, and that your server is able to connect to PayPal® over an HTTPS connection.',
2 => 's2Member uses the WP_Http class for remote connections; which will try to use cURL first, and then fall back on the FOPEN method when cURL is not available. On a Windows® server, you may have to disable your cURL extension. Instead, set allow_url_fopen = yes in your php.ini file. The cURL extension (usually) does NOT support SSL connections on a Windows® server.',
3 => 'array (
\'s2member_paypal_return\' => \'1\',
\'tx\' => \'00K70904GM508151H\',
\'st\' => \'Completed\',
\'amt\' => \'25.00\',
\'cc\' => \'USD\',
\'cm\' => \'\',
\'item_number\' => \'\',
)',
4 => 'Redirecting Customer to the Login Page, due to an error that occurred.',
),
)

www.rfpbook.0fees.net/?s2member_paypal_ ... em_number=
User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.60 Safari/534.24
array (
's2member_log' =>
array (
0 => 'Unable to verify POST vars. This is most likely related to an invalid PayPal® configuration. Please check: s2Member -> PayPal® Options.',
1 => 'If you\'re absolutely SURE that your PayPal® configuration is valid, you may want to run some tests on your server, just to be sure $_POST variables are populated, and that your server is able to connect to PayPal® over an HTTPS connection.',
2 => 's2Member uses the WP_Http class for remote connections; which will try to use cURL first, and then fall back on the FOPEN method when cURL is not available. On a Windows® server, you may have to disable your cURL extension. Instead, set allow_url_fopen = yes in your php.ini file. The cURL extension (usually) does NOT support SSL connections on a Windows® server.',
3 => 'array (
\'s2member_paypal_return\' => \'1\',
\'tx\' => \'0UA46214N30801645\',
\'st\' => \'Completed\',
\'amt\' => \'25.00\',
\'cc\' => \'USD\',
\'cm\' => \'\',
\'item_number\' => \'\',
)',
4 => 'Redirecting Customer to the Login Page, due to an error that occurred.',
),
)

www.rfpbook.0fees.net/?s2member_paypal_ ... em_number=
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.10) Gecko/20100914 Firefox/3.6.10
array (
's2member_log' =>
array (
0 => 'Unable to verify POST vars. This is most likely related to an invalid PayPal® configuration. Please check: s2Member -> PayPal® Options.',
1 => 'If you\'re absolutely SURE that your PayPal® configuration is valid, you may want to run some tests on your server, just to be sure $_POST variables are populated, and that your server is able to connect to PayPal® over an HTTPS connection.',
2 => 's2Member uses the WP_Http class for remote connections; which will try to use cURL first, and then fall back on the FOPEN method when cURL is not available. On a Windows® server, you may have to disable your cURL extension. Instead, set allow_url_fopen = yes in your php.ini file. The cURL extension (usually) does NOT support SSL connections on a Windows® server.',
3 => 'array (
\'s2member_paypal_return\' => \'1\',
\'tx\' => \'04J67763PD3807141\',
\'st\' => \'Pending\',
\'amt\' => \'25.00\',
\'cc\' => \'USD\',
\'cm\' => \'\',
\'item_number\' => \'\',
)',
4 => 'Redirecting Customer to the Login Page, due to an error that occurred.',
),
)

www.rfpbook.0fees.net/?s2member_paypal_ ... em_number=
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.2.17) Gecko/20110420 Firefox/3.6.17 (.NET CLR 3.5.30729)
array (
's2member_log' =>
array (
0 => 'Unable to verify POST vars. This is most likely related to an invalid PayPal® configuration. Please check: s2Member -> PayPal® Options.',
1 => 'If you\'re absolutely SURE that your PayPal® configuration is valid, you may want to run some tests on your server, just to be sure $_POST variables are populated, and that your server is able to connect to PayPal® over an HTTPS connection.',
2 => 's2Member uses the WP_Http class for remote connections; which will try to use cURL first, and then fall back on the FOPEN method when cURL is not available. On a Windows® server, you may have to disable your cURL extension. Instead, set allow_url_fopen = yes in your php.ini file. The cURL extension (usually) does NOT support SSL connections on a Windows® server.',
3 => 'array (
\'s2member_paypal_return\' => \'1\',
\'tx\' => \'17K9316955901612P\',
\'st\' => \'Pending\',
\'amt\' => \'25.00\',
\'cc\' => \'USD\',
\'cm\' => \'\',
\'item_number\' => \'\',
)',
4 => 'Redirecting Customer to the Login Page, due to an error that occurred.',
),
)

Thanks.

That's not the IPN log, but it still tells you about the error. It also gives you some instructions, did you follow them?

0 => 'Unable to verify POST vars. This is most likely related to an invalid PayPal® configuration. Please check: s2Member -> PayPal® Options.',
1 => 'If you\'re absolutely SURE that your PayPal® configuration is valid, you may want to run some tests on your server, just to be sure $_POST variables are populated, and that your server is able to connect to PayPal® over an HTTPS connection.',
2 => 's2Member uses the WP_Http class for remote connections; which will try to use cURL first, and then fall back on the FOPEN method when cURL is not available. On a Windows® server, you may have to disable your cURL extension. Instead, set allow_url_fopen = yes in your php.ini file. The cURL extension (usually) does NOT support SSL connections on a Windows® server.',

Thanks Cristian,
Unfortunately, I have no idea about how to run these tests. But I figured it out that my test server does not connect to paypal over HTTPS. I moved to the production server and its working fine.
Now I need to figure out a way to associate EOT with download limit.
I will make a new post for that so that users searching for similar solution can benefit.

I'm glad you solved it! Thanks for reporting back.

Yeah, good idea on starting a new thread for that.