acf/input/form_data

Description

Used to output additional HTML within the hidden <div id="acf-form-data"> element.

This element is output within each form, and includes hidden inputs used to process the form data.

Parameters

do_action( 'acf/form_data', $data );
  • $data (array) The current form data including "screen", "post_id" and "nonce".

Changelog

  • Added in version 5.0.0

Example

This example demonstrates how to output a hidden input, and then later perform an action depending on that value.

functions.php

<?php
add_action('acf/input/form_data', 'my_acf_input_form_data');
function my_acf_input_form_data( $data ) {
    echo '<input type="hidden" name="_my_hidden_input" value="123" />';
}

add_action('acf/save_post', 'my_acf_save_post');
function my_acf_save_post( $post_id ) {
    if( isset($_POST['_my_hidden_input']) ) {
        // Do something.
    }
}