Merge tag manipulations, Gravity Forms Send to API · vanrossum.dev    

       vanrossum.dev 

Merge tag manipulations, Gravity Forms Send to API
==================================================

  vanrossum.dev  

  [      vanrossum.dev ](https://vanrossum.dev)                      

 [home](https://vanrossum.dev) / [gf-send-to-api](https://vanrossum.dev/products/gf-send-to-api) / docs 

 [Gravity Forms Send to API](https://vanrossum.dev/products/gf-send-to-api)  / Docs  · WordPress plugin

 Merge tag manipulations
========================

You can manipulate merge tag values before you send them to your API.

Need to uppercase a something? Simply: `{gfsta_manipulation value="{FirstName:3}" uppercase}`

Say you need to send an image of a signature as base64 encoded string. The [Gravity Forms Signature add-on](https://www.gravityforms.com/add-ons/signature/) will allow you to add the signature field, but only provides a URL of the image afterwards.

Now, in the body, you can add a merge tag that base64 encodes this image like so:

```
{gfsta_manipulation value="{Signature:3}" base64_encode="url"}

```

These manipulations will also work on merge tags created from the API response. If you want, for example, to only get the last name of a full name value:

```
{gfsta_full_name split_get="1| "}

```

Or get the longitude of a value that holds the lat/long values comma seperated:

```
{gfsta_coordinates split_get="last|,"}

```

The full list of manipulations:

ManipulationDescriptionExampleuppercaseUppercase a value`{gfsta_first_name uppercase}`lowercaseLowercase a value`{gfsta_first_name lowercase}`date\_formatFormat a date value`{gfsta_created_at date_format="Y-m-d"}`split\_getSplit and then get a value`{gfsta_coordinates split_get="0|,"}` where 0 is the index and , the seperator. As index, you can also pass `first` or `last`base64\_encodeBase64 encode a value`{gfsta_image base64_encode}` or for a URL input `{gfsta_image base64_encode="url"}`manipulationYou can use this to manipulate other merge tag values. You need to set the value first.`{gfsta_manipulate value="{FirstName:3}" uppercase}`

Stuck?

Feel free to reach out.

 [get in touch →](https://vanrossum.dev/contact) 

   © 2026 Jeffrey van Rossum 

  vanrossum.dev vanrossum.dev