Custom Input is an add-on for the Payment Button for PayPal WordPress plugin (also known as WP PayPal or WordPress PayPal) that can be used to show a text box at PayPal checkout. The text box can used to collect custom data from buyers.

How Custom Input with WP PayPal Works
When a WP PayPal payment button is rendered on the front end with custom input enabled, a text box will appear that will let buyers enter any data. This can be useful if a buyer would like to include a custom note or special instructions.

The default label for the custom input field (Enter any special instructions) can be customized in the add-on settings (WP PayPal > Custom Input).

How to Enable Custom Input
In order to enable custom input for a WP PayPal button, you need to set the custom parameter empty in the shortcode.
[wp_paypal button="buynow" name="My product" amount="1.00" custom=""]
John says
Can I get the delivery date from buyers?
Noor Alam says
@John, Any custom text value can be entered in that field.
EricH says
Where will the content from the custom input field show up? I do not see it in the checkout. Also, is there a way to make the input field visually larger? Thanks.
Noor Alam says
@EricH, It shows with the button. The input field can be customized with CSS.
EricH says
Thank you, but I meant, once the PayPal button is clicked by the user, where does the info that the user typed into the custom field appear? I tested it, and did not see that content in the PayPal checkout.
Noor Alam says
@EricH, You will find it with the order in the plugin. You can also use the
{custom}
tag if you plan to use it in the email.FrancescoT says
Is it possible to use this plugin with a subscription type button? Is it possible to change the amount to charge to the buyer depending on the input?
Noor Alam says
@FrancescoT, Please check this link for subscription type button setup: https://wphowto.net/how-to-create-a-paypal-subscription-button-in-wordpress-911
Linda Carter says
I was surprised to see there are no fields for the customer to submit their shipping address. We’ve used it mostly for donations, but we do have several books for sale. Can we use this to add their shipping address? Can we add multiple lines?
Noor Alam says
@Linda, There is no need for the plugin to collect a customer’s shipping address on the site. PayPal will do this for you when they make the payment.
The add-on supports a single custom field at the moment.