GF-ACF image attachment maker

gf-acf-image-attachment-maker.php

<?php

/**
 * Change the default GF upload path
 * https://www.gravityhelp.com/documentation/article/gform_upload_path/
 */
function agw_change_upload_path($path_info, $form_id){
    $wp_upload_path = wp_upload_dir();
    $path_info["path"] = $wp_upload_path['path'] . '/';
    $path_info["url"] = $wp_upload_path['url'] . '/';
    return $path_info;
}
add_filter("gform_upload_path", "change_upload_path", 20, 2);

/**
 * Create the image attachment and return the new media upload id
 */
function agw_create_image_id( $image_url, $parent_post_id = null ) {

    if( !isset( $image_url ) )
        return false;

    global $_wp_additional_image_sizes;

    // Cache info on the wp uploads dir
    $wp_upload_dir = wp_upload_dir();
    // get the file path
    $path = parse_url( $image_url, PHP_URL_PATH );

    // File base name
    $file_base_name = basename( $image_url );

    $uploaded_file_path = ABSPATH . $path;

    // Check the type of file. We'll use this as the 'post_mime_type'.
    $filetype = wp_check_filetype( $file_base_name, null );

    // error check
    if( !empty( $filetype ) && is_array( $filetype ) ) {
        // Create attachment title
        $post_title = preg_replace( '/\.[^.]+$/', '', $file_base_name );
    
        // Prepare an array of post data for the attachment.
        $attachment = array(
            'guid'           => $wp_upload_dir['url'] . '/' . basename( $uploaded_file_path ), 
            'post_mime_type' => $filetype['type'],
            'post_title'     => esc_attr( $post_title ),
            'post_content'   => '',
            'post_status'    => 'inherit'
        );
    
        // Set the post parent id if there is one
        if( !is_null( $parent_post_id ) )
            $attachment['post_parent'] = $parent_post_id;

        foreach( get_intermediate_image_sizes() as $s ) {

            $sizes[$s] = array( 'width' => '', 'height' => '', 'crop' => true );

            if( in_array( $s, array( 'thumbnail', 'medium', 'large' ) ) ) {

                $sizes[$s]['width'] = get_option( "{$s}_size_w" ); // For default sizes set in options
                $sizes[$s]['height'] = get_option( "{$s}_size_h" ); // For default sizes set in options
                $sizes[$s]['crop'] = get_option( "{$s}_crop" ); // For default sizes set in options
            
            }

            if( isset( $_wp_additional_image_sizes[ $s ] ) ) {

                $sizes[ $s ] = array(
                    'width' => $_wp_additional_image_sizes[ $s ]['width'],
                    'height' => $_wp_additional_image_sizes[ $s ]['height'],
                    'crop' =>  $_wp_additional_image_sizes[ $s ]['crop'],
                    );

            }
        
        }

        $sizes = apply_filters( 'intermediate_image_sizes_advanced', $sizes );  

        foreach( $sizes as $size => $size_data ) {

            $resized = image_make_intermediate_size( $uploaded_file_path, $size_data['width'], $size_data['height'], $size_data['crop'] );

            if ( $resized )
                $attachment['sizes'][$size] = $resized;
        }

        // Insert the attachment.
        $attach_id = wp_insert_attachment( $attachment, $uploaded_file_path );
        //Error check
        if( !is_wp_error( $attach_id ) ) {
            //Generate wp attachment meta data
            if( file_exists( ABSPATH . 'wp-admin/includes/image.php') && file_exists( ABSPATH . 'wp-admin/includes/media.php') ) {
                require_once( ABSPATH . 'wp-admin/includes/image.php' );
                require_once( ABSPATH . 'wp-admin/includes/media.php' );
                $attach_data = wp_generate_attachment_metadata( $attach_id, $uploaded_file_path );
                wp_update_attachment_metadata( $attach_id, $attach_data );
            } // end if file exists check
        } // end if error check

        return $attach_id; 

    } else {
        return false;
    } // end if $$filetype
} // end function get_image_id


/**
 * If upload field has value, do the magic
 */
$post_id = 'YOUR POST ID';
$gf_field_id = '1';
if( isset( $entry[$gf_field_id] ) ) {
    $images = stripslashes( $entry[$gf_field_id] );
    $images = json_decode( $images, true );
    if( !empty( $images ) && is_array( $images ) ) {
        $gallery = array();
        foreach( $images as $key => $value ) {
            if( function_exists( 'agw_create_image_id' ) )
                $image_id = agw_create_image_id( $value, $post_id );

            if( $image_id ) {
                $gallery[] = $image_id;
            }
        }
    }
}

// If we have images, update the ACF field
if( ! empty( $gallery ) ) {
    update_field( 'FIELD_NAME_HERE', $gallery, $post_id );
}