Fix Search Post in Filter Options

add_action( 'wp_ajax_jeg_find_post', 'jeg_find_post' );

function jeg_find_post() {
    if ( isset( $_REQUEST['nonce'], $_REQUEST['query'] ) && wp_verify_nonce( sanitize_key( $_REQUEST['nonce'] ), 'jeg_find_post' ) ) {

        $query = sanitize_text_field( wp_unslash( $_REQUEST['query'] ) );

        if ( (bool) $query ) {
            add_filter(
                'posts_where',
                function ( $where ) use ( $query ) {
                    global $wpdb;

                    // if ( isset( $_REQUEST['string'] ) && ! empty( $_REQUEST['string'] ) ) {
                    //  $string = $_REQUEST['string'];

                    $where .= $wpdb->prepare( "AND {$wpdb->posts}.post_title LIKE %s", '%' . $wpdb->esc_like( $query ) . '%' );
                    // }

                    return $where;
                }
            );
        }

        $query = new \WP_Query(
            [
                'post_type'      => 'post',
                'posts_per_page' => '15',
                'post_status'    => 'publish',
                'orderby'        => 'date',
                'order'          => 'DESC',
            ]
        );

        $result = [];

        if ( $query->have_posts() ) {
            while ( $query->have_posts() ) {
                $query->the_post();

                $result[] = [
                    'value' => get_the_ID(),
                    'text'  => get_the_title(),
                ];
            }
        }

        wp_reset_postdata();
        wp_send_json_success( $result );
    }
}