Description
This filter is executed when creating the Post Image Caption field and can be used to modify the “Caption” label.
Usage
The following would apply your function to all forms.
add_filter( 'gform_postimage_caption', 'your_function_name', 10, 2 );
To target a specific form append the form id to the hook name. (format: gform_postimage_caption_FORMID)
add_filter( 'gform_postimage_caption_5', 'your_function_name', 10, 2 );
Examples
This example changes the default Post Image Caption label:
add_filter( 'gform_postimage_caption', 'change_postimage_caption', 10, 2 ); function change_postimage_caption( $label, $form_id ) { return 'Image Caption'; }
Source Code
This filter is located in GF_Field_Post_Image::get_field_input() in includes/fields/class-gf-field-post-image.php.