Picture this scenario: a potential client lands on your WordPress payment page, ready to make a purchase. But, oh no! They see a long form filled with fields they need to complete. Frustrating, right? Now, imagine if some of those fields were already filled in with their information, like their name and email address.
When it comes to payment forms on your WordPress site, every second counts! You want users to complete their transactions quickly and smoothly.
Using shortcodes is effective way to enhance user experience is by autofilling forms on your WordPress site.
In this guide, we’ll break down how to pre-fill your payment forms with shortcodes, making the payment process easy-peasy for your users.
What is the “auto-populate fields”?
Pre-filling forms with shortcodes is like giving your users a head start. It automatically fills in specific form fields with information from your WordPress posts, pages, or even user data. This means your users won’t have to type in their information repeatedly, saving them time and reducing errors.
What is a form shortcode?
A form shortcode is a short piece of code—usually inside square brackets—that you add to your website to automatically display a form without needing to code it from scratch.
For example, in WordPress, you might use something like [contact-form-7 id="1234"] to insert a contact form onto your page.
Setting Up Pre-filled Fields in WP Full Pay
Enabling Pre-filling Globally
Before diving into specific implementation methods, it’s important to ensure that form field pre-filling is enabled in your WP Full Pay settings:
- Navigate to your WordPress dashboard
- Go to WP Full Pay → Settings
- Select the “Forms” tab
- Make sure “Allow setting form fields via URL parameters” is checked
- Save your changes
This setting enables the auto-fill WordPress payment forms functionality across all your payment forms.
You can download WP Full Pay plugin for free, create Stripe payment forms, and test Stripe transactions on your WordPress site.
Configuring Pre-filling for Specific Forms
WP Full Pay allows you to control pre-filling settings at the individual form level as well:
- Go to WP Full Pay → Forms
- Edit the specific payment form you want to configure
- In the form editor, locate the “Form Settings” panel
- Find the “Field Pre-filling” options
- Choose which fields can be pre-populated
- Save your form
Supported Field Types for Auto-Population
WP Full Pay supports pre-population for a wide range of field types:
- Text fields: Name, address, company, etc.
- Email fields: Customer email address
- Dropdown menus: Product selection, quantities
- Radio buttons: Payment options, plan selection
- Checkboxes: Add-ons or options
- Amount fields: Payment or donation amounts
Pre-filling Payment Forms Using URL Parameters
URL Parameter Syntax and Structure
The most common method for pre-filling form fields in WP Full Pay is through URL parameters. Here’s the basic syntax:
https://yourwebsite.com/payment-page/?fullstripe_firstName=John&fullstripe_lastName=Doe
All WP Full Pay URL parameters use the fullstripe_ prefix followed by the field name. This structured approach makes it easy to create dynamic payment form fields that change based on the link a customer clicks.
Pre-filling Customer Information Fields
To pre-populate customer information, use these parameters:
fullstripe_firstName – Customer’s first namefullstripe_lastName – Customer’s last namefullstripe_email – Email addressfullstripe_address – Street addressfullstripe_city – Cityfullstripe_state – State/provincefullstripe_country – Countryfullstripe_zipcode – ZIP/Postal code
Example URL for pre-filling customer details:
https://yoursite.com/checkout/?fullstripe_firstName=Jane&fullstripe_lastName=Smith&[email protected]
Pre-filling Payment Details and Amounts
For payment forms with variable amounts or product options:
fullstripe_amount – Payment amount (in smallest currency unit, e.g., cents)fullstripe_quantity – Product quantityfullstripe_custom_input – Any custom field defined in your form
To pre-fill a payment amount of $25.00:
https://yoursite.com/donate/?fullstripe_amount=2500
Adding Coupons and Promotional Codes Automatically
WP Full Pay makes it easy to pre-populate promotional codes or coupons:
https://yoursite.com/subscription/?fullstripe_couponCode=SUMMER25
This feature is perfect for email marketing integration or special promotions, allowing you to create targeted offers with discount codes already applied.
Advanced Pre-filling with Filter Hooks
Implementing the fullstripe_form_field_configuration Filter
For developers needing more control over pre-filling, WP Full Pay offers a powerful filter hook that allows programmatic field population:
function my_prefill_form_fields( $formFields, $formName, $formType ) {
// Check if this is our target form
if ( $formName === 'my-payment-form' ) {
// Pre-fill customer data
$formFields['firstName'] = 'John';
$formFields['lastName'] = 'Doe';
$formFields['email'] = '[email protected]';
// Set payment amount (in cents)
$formFields['amount'] = 1999;
}
return $formFields;
}
add_filter( 'fullstripe_form_field_configuration', 'my_prefill_form_fields', 10, 3 );
This filter hook approach gives you complete flexibility to pull data from your WordPress database, user profiles, or external APIs to populate form fields.
Making Fields Read-Only After Pre-filling
Sometimes you want to ensure pre-filled information can’t be changed. With WP Full Pay, you can use the same filter to make fields read-only:
function make_prefilled_fields_readonly( $formFields, $formName, $formType ) {
if ( $formName === 'subscription-form' ) {
// Pre-fill the email field
$formFields['email'] = '[email protected]';
// Make it read-only
$formFields['email_readonly'] = true;
}
return $formFields;
}
add_filter( 'fullstripe_form_field_configuration', 'make_prefilled_fields_readonly', 10, 3 );
Conditional Pre-filling Based on Form Type
Different payment forms might require different pre-filling strategies. Using the form type parameter, you can apply conditional logic:
function conditional_prefill( $formFields, $formName, $formType ) {
// For one-time payment forms
if ( $formType === 'payment' ) {
$formFields['amount'] = 5000; // $50.00
}
// For subscription forms
if ( $formType === 'subscription' ) {
$formFields['couponCode'] = 'FIRSTMONTH';
}
return $formFields;
}
add_filter( 'fullstripe_form_field_configuration', 'conditional_prefill', 10, 3 );
Real-World Implementation Examples
Creating Personalized Payment Links for Email Campaigns
One of the most powerful applications of pre-filling form fields is in email marketing campaigns. Here’s how to implement this:
- Create your payment form in WP Full Pay with all necessary fields
- In your email marketing tool (like Mailchimp or ConvertKit), create a dynamic URL that includes customer data:
https://yoursite.com/payment/?fullstripe_firstName={{first_name}}&fullstripe_lastName={{last_name}}&fullstripe_email={{email}}&fullstripe_amount=1500
When customers click this link from their email, they’ll see a payment form with their information already filled in, resulting in higher conversion rates and a smoother customer experience.
Building Multi-step Payment Flows
Pre-populated fields are excellent for creating multi-step payment processes where information carries over between steps:
- Create an initial form that collects basic information
- On submission, redirect to a payment form with URL parameters containing the collected data
This approach allows you to break complex transactions into manageable steps while maintaining data continuity across the customer journey.
Integrating with Customer Management Systems
You can also use WP Full Pay pre-filling capabilities with your CRM or membership system:
function crm_integration_prefill( $formFields, $formName, $formType ) {
// Get current user
$current_user = wp_get_current_user();
if ( $current_user->ID > 0 ) {
// User is logged in, pre-fill form with their data
$formFields['firstName'] = $current_user->first_name;
$formFields['lastName'] = $current_user->last_name;
$formFields['email'] = $current_user->user_email;
// Get custom user meta if available
$phone = get_user_meta( $current_user->ID, 'phone', true );
if ( !empty( $phone ) ) {
$formFields['phone'] = $phone;
}
}
return $formFields;
}
add_filter( 'fullstripe_form_field_configuration', 'crm_integration_prefill', 10, 3 );
Troubleshooting and Best Practices
Security Considerations When Pre-filling Sensitive Data
While pre-populating form fields offers convenience, it’s important to consider security:
- Never include sensitive data like credit card numbers in URL parameters
- Use HTTPS for all pages containing payment forms
- Consider using server-side pre-filling for truly sensitive information
- Implement proper validation even for pre-filled fields
Testing Your Pre-filled Forms
Before deploying pre-populated payment forms, thorough testing is essential:
- Test with various parameter combinations
- Verify that special characters are handled correctly
- Check the form behavior when some parameters are missing
- Test on multiple devices and browsers
- Verify the complete payment process with test transactions
Optimizing Form Conversions with Strategic Pre-filling
To maximize the effectiveness of your pre-filled payment forms:
- Only pre-fill fields where you have high confidence in data accuracy
- Highlight pre-filled fields visually to draw attention to the information
- Include clear calls-to-action that emphasize the simplified process
- A/B test different pre-filling strategies to find what works best
- Monitor completion rates before and after implementing pre-filling
💡 You can also add different payment methods supported by Stripe to your checkout page.
📖 Learn how to enable payment methods at your checkout page.
FAQs on Auto-Populating Payment Form Fields
Can I pre-fill custom fields created in WP Full Pay?
Yes, custom fields can be pre-filled using the parameter format fullstripe_custom_input_{field_name}.
Will pre-filled fields work with all payment form types?
WP Full Pay supports pre-filling for all form types, including one-time payments, subscriptions, donations, and save card forms.
Can I use pre-filling with WP Full Members membership forms?
Absolutely! Pre-filling works seamlessly with the WP Full Members addon for creating membership sites.
Is it possible to pre-fill different amounts based on user selection?
Yes, you can create multiple payment links with different pre-filled amount values, or use conditional logic with the filter hook approach.
How can I track which pre-filled links are performing best?
Add UTM parameters alongside your pre-filling parameters to track campaign performance in your analytics tool.