Forminator - map upload to ACF gallery via postdata

forminator-acf-gallery-postdata-upload-map.php

<?php 
/**
 * Plugin Name: Forminator - map upload to ACF gallery via postdata
 * Description: Forminator - map upload to ACF gallery via postdata
 * Author: adczk 
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 *
 * USE A MU PLUGIN
 *
 * UPLOAD field must be set to "multiple"
 * and must already be correctly mapped in postdata field to ACF field
 * config: see comments in code (lines 20-21)
 *
 * Tested with Forminator Pro 1.24
 */

add_action( 'forminator_post_data_field_post_saved', 'wpmudev_update_post_acf_uploads', 10, 4 );
function wpmudev_update_post_acf_uploads( $post_id, $field, $data, $cls ) {
	$submitted_data = Forminator_CForm_Front_Action::$prepared_data;
	
	$acf_fields = array( 'mygal' ); // set your ACF gallery fields names
	$form_ids = array( 16502 ); // set your form IDs
	
	if ( !in_array( $submitted_data['form_id'], $form_ids ) ) {
		return;
	}
	
	$acf_field = '';
	$upload_field = '';
	$img_ids = array();
	if ( isset( $submitted_data['postdata-1']['post-custom'] ) ){
		
		foreach ( $submitted_data['postdata-1']['post-custom'] as $pkey=>$pval ) {
			
			if ( (in_array($pval['key'], $acf_fields)) && (strpos( $pval['value'], 'upload') !== false ) ) {
				
				$acf_field = $pval['key'];
				$upload_field = str_replace( "}", "", str_replace( "{", "", $pval['value'] ) );
				
				
				foreach ( $submitted_data[$upload_field]['file']['file_url'] as $ikey=>$iurl ) {
					$img_ids[] = attachment_url_to_postid( $iurl );
				}
					
				
				if ( ! empty( $img_ids ) ) {
					update_field( $acf_field, $img_ids, $post_id);
					
				}
				
				
			}
			
		}
		
	}

}