Gravity Support Forums Topic: How do you add a PHP variable as a hidden input field?

Gravity Support Forums Topic: How do you add a PHP variable as a hidden input field? https://legacy.forums.gravityhelp.com/topic/how-do-you-add-a-php-variable-as-a-hidden-input-field Gravity Support Forums Topic: How do you add a PHP variable as a hidden input field? en-US Mon, 06 Apr 2026 18:35:01 +0000 http://bbpress.org/?v=1.0.1 <![CDATA[Search]]> q https://legacy.forums.gravityhelp.com/search.php Carl Hancock on "How do you add a PHP variable as a hidden input field?" https://legacy.forums.gravityhelp.com/topic/how-do-you-add-a-php-variable-as-a-hidden-input-field#post-22049 Wed, 30 Mar 2011 11:28:49 +0000 Carl Hancock 22049@https://legacy.forums.gravityhelp.com/ You would do this using custom PHP and the gform_field_value filter hook. Documentation for this hook is below: <a href="http://www.gravityhelp.com/documentation/page/Gform_field_value_$parameter_name" rel="nofollow">http://www.gravityhelp.com/documentation/page/Gform_field_value_$parameter_name</a> In order to use this hook you must do the following: - Edit your Form - Add a hidden field you want to populate and give it a name - Edit the hidden field - Select the Advanced tab - Select the "Allow field to be populated dynamically" checkbox - Give the field a parameter name, this parameter name is used to target the field so name it something simple like "email" or something similar. - Save your form Then you would use the gform_field_value hook by adding custom code in your themes functions.php file to dynamically populate that field. For example, if you set the parameter to "email" your code would look like this: <pre><code><?php add_filter("gform_field_value_email", "populate_email"); function populate_email($value){ return "email@value.com"; } ?></code></pre> karlbitz on "How do you add a PHP variable as a hidden input field?" https://legacy.forums.gravityhelp.com/topic/how-do-you-add-a-php-variable-as-a-hidden-input-field#post-22011 Tue, 29 Mar 2011 21:20:12 +0000 karlbitz 22011@https://legacy.forums.gravityhelp.com/ I can't seem to find this anywhere and it seems like it should be pretty simple. All I want to do is populate a hidden input with a pre-existing PHP variable. For example - let's say I already know the user's email. When they fill out the form, normally I might do something like: <pre><code><input type="hidden" id="email" value="<?php echo('$email'); ?>" /></code></pre> How would I replicate this behavior using a Gravity Form? Thanks!