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It is possible to configure Shortcode Attributes dynamically.

But first, you will need to install a PHP Execution plugin.
http://wordpress.org/extend/plugins/php ... on-plugin/

Now, let's assume you have a URL like this on your site:

Code: Select all

http://www.YOURSITE.com/membership-options-page/?amount=129.00

Inside your Membership Options Page, or whatever Page contains your Shortcode, you can do this:

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[s2Member-PayPal-Button ... ra="<?php echo esc_attr($_REQUEST["amount"]); ?>" ... /]

( this Button Code has been abbreviated for clarity; showing only the "ra" attribute )

So in this example, the "ra" attribute ( i.e. the Regular Amount ), is configured dynamically based on the value of ?amount=129.00 in the URL. This particular example may or may not be useful to you, but it demonstrates your ability to configure Shortcode Attributes dynamically. You could even take this a step further by constructing custom forms on your site that contain options; which ultimately dictate the amount that you'll charge. Where the final amount is configured dynamically.

* NOTE: You MUST be in the HTML tab of your editor when adding PHP tags.

Related topic. Someone asked about configuring Pro Form Attributes dynamically.
~ the example above can be applied to ANY Shortcode, even for Pro Forms.

However, there are two ways to dynamically configure a PayPal Pro Form.

1. Using variables in your Shortcode ( explained here )
( note, you can apply the concept discussed in this thread, to any Shortcode Attribute )
viewtopic.php?f=36&t=1604

2. Or, you can apply a Filter of your own, to all Pro Forms during checkout processing.
Create this directory and file:
/wp-content/mu-plugins/s2-hacks.php

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<?php
add_filter ("ws_plugin__s2member_pro_paypal_checkout_post_attr", "my_paypal_pro_checkout_form_attr");
function my_paypal_pro_checkout_form_attr ($attr = array ())
    {
        if ($_POST["something-custom"] === "some custom value")
            {
                $attr["ra"] = "10.00"; /* Adjust price dynamically. */
                /* And/or, you could adjust other Attributes too. */
                /* $attr["rp"], $attr["rt"], etc, etc. */
            }
        /**/
        return (array)$attr;
    }
?>

^ this is for all PayPal Pro Checkout Forms, except Specific Post/Page Access.

This is for PayPal Pro Specific Post/Page Checkout Forms.

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<?php
add_filter ("ws_plugin__s2member_pro_paypal_sp_checkout_post_attr", "my_paypal_pro_sp_checkout_form_attr");
function my_paypal_pro_sp_checkout_form_attr ($attr = array ())
    {
        if ($_POST["something-custom"] === "some custom value")
            {
                $attr["ra"] = "10.00"; /* Adjust price dynamically. */
                /* And/or, you could adjust other Attributes too. */
                /* $attr["ids"], $attr["exp"], etc, etc. */
            }
        /**/
        return (array)$attr;
    }
?>

^ this is for PayPal Pro Specific Post/Page Checkout Forms.

The examples above will also work for Authorize.Net Pro Forms.
Just change all occurrences of the word "paypal" in the code, to "authnet".

Pro Forms can also be generated dynamically via PHP code.
See this article: viewtopic.php?f=40&t=12764&p=34117#p34117

But why did the shortcode running within a PHP environment failed to get interpreted (and end up like a literal value)? What are the caveats?

So using your example, my code look something like this:

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<?php
  $amount = $_REQUEST["amount"];
   do_shortcode('[s2Member-PayPal-Button ... ra="$amount" ... /]');
');
?>


angelazou,

You're not using the PHP Variables properly. Please see my response here: viewtopic.php?f=4&t=16906#p61640