Add multiple files to acf repeater field

add-files-to-custom-fields.php

$files = $_FILES[ 'attachments' ];
$attachments = [];

foreach ( $files['name'] as $key => $value ) {
    if ( $files[ 'name' ][ $key ] ) {
        $file = array(
            'name'     => $files[ 'name' ][ $key ],
            'type'     => $files[ 'type' ][ $key ],
            'tmp_name' => $files[ 'tmp_name' ][ $key ],
            'error'    => $files[ 'error' ][ $key ],
            'size'     => $files[ 'size' ][ $key ]
        );
        $attachments[] = $file;
    }
}

foreach ($attachments as $file) {
    if (is_uploaded_file($file['tmp_name'])) {
        $remove_these = array(' ', '', '\"', '\\', '\/');

        $newname = str_replace($remove_these, '', $file['name']);
        $newname = time() . '-' . $newname;
        $uploads = wp_upload_dir();
        $upload_path = "{$uploads['path']}/$newname";
        move_uploaded_file($file['tmp_name'], $upload_path);
        $upload_file_url = "{$uploads['url']}/$newname";

        $wp_filetype = wp_check_filetype(basename($upload_path), null );
        $attachment = array(
            'guid' => $upload_file_url,
            'post_mime_type' => $wp_filetype['type'],
            'post_title' => preg_replace('/\.[^.]+$/', '', basename($upload_path)),
            'post_content' => '',
            'post_status' => 'inherit'
        );
        $attach_id = wp_insert_attachment($attachment, $upload_path, $post_id);

        // Repeater child field name - "file"
        $file_row = array(
            'file' => $attach_id 
        );

        // Repeater parent field name - "attachments"
        add_row('attachments', $file_row, $post_id);

        // require_once(ABSPATH . 'wp-admin/includes/image.php');
        // $attach_data = wp_generate_attachment_metadata( $attach_id, $upload_path );
        // wp_update_attachment_metadata( $attach_id, $attach_data );
    }
}

it's working ! thanks