Do you want to return a portion of a Merge Tag string output? And specify an offset and length of the part of the Merge Tag output? With Advanced Merge Tags it’s as easy as it gets.
Using the gwp_substring Modifier for Gravity Forms
With the gwp_substring Modifier for Gravity Forms Merge Tags it’s possible to return a part of value (a substring of the original string). You can use the modifier like this:
:gwp_substring start= length=The modifier has two arguments:
- start: how many characters should it skip when using a positive value / where does the substring start. When using a negative value (for example -3), the substring will start the number of characters before the end of the value.
- length: how many characters should be in the substring / what is the length of the substring.
Try it yourself
Example gwp_substring
This example gives back a substring of the value in the Gravity Forms field ‘String’ (with Field ID 1). It skips the first two characters and gives back 3 characters:
{String:1:gwp_substring start=2 length=3}Offset from the end of the string
When using a negative value for the start of the substring (for example start=-3), the substring will start 3 characters before the end of the value (string).
{String:1:gwp_substring start=-3 length=1}Examples offset and length
| s | u | b | s | t | r | i | n | g |
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Merge Tag & Modifier | Output |
|---|---|
{String:1} | substring |
{String:1:gwp_substring length=3} | sub |
{String:1:gwp_substring start=3 length=3} | str |
{String:1:gwp_substring start=-3} | ing |
{String:1:gwp_substring start=-3 length=1} | i |
Our Premium add-ons for Gravity Forms
Advanced Number Field
Functionality for Number Fields, like rounding or only absolute numbers, fixed point notation, range calculation, custom units like % or m2 & show as slider.
All Entries
All your new Gravity Forms entries in one central place. Stop navigating between multiple forms to find new entries. Get immediate oversight and full control with a powerful, unified dashboard.
n8n Connector
Connect Gravity Forms to n8n and automate your workflows with secure, flexible, and powerful webhooks. Go beyond simple notifications and build advanced, two-way automations.
JWT Prefill
Fill forms with data you can trust. Prefill Gravity Forms fields with a secure token instead of links with editable url parameters, so your data is accurate, tamper-proof, and ready to use.
Read tutorials about
How to Validate Repeatable Contact Rows in Gravity Forms
Learn how to validate repeatable Gravity Forms List field rows with GravityWP List Text. This tutorial shows how to add email and regex validation, test invalid values, and confirm that valid team roster data is stored correctly.
Gravity Forms Airtable Integration: Create Records From Form Submissions
Learn how to build a Gravity Forms Airtable integration with GravityWP API Connector. Send form submissions to Airtable, create new records automatically, and save the returned Airtable Record ID and response back to Gravity Forms.
Gravity Forms Asana Integration: Create Tasks From Form Submissions
Learn how to connect Gravity Forms to Asana with GravityWP API Connector. This tested workflow creates Asana tasks from form submissions and saves the returned task ID and URL back to Gravity Forms.
Gravity Forms Google Calendar Integration: Create Events From Form Submissions
Connect Gravity Forms to Google Calendar with GravityWP API Connector. Learn how to create calendar events from form submissions, map event details, configure OAuth 2.0, handle time zones, and save the returned Event ID and URL.
