機能チェック、データ検証、安全な入力、安全な出力、ノンスを使用した完全な例： 

    1. /**
    2.  * Generate a Delete link based on the homepage url.
    3.  *
    4.  * @param string $content   Existing content.
    5.  *
    6.  * @return string|null
    7.  */
    8. function wporg_generate_delete_link( $content ) {
    9.     // Run only for single post page.
    10.     if ( is_single() && in_the_loop() && is_main_query() ) {
    11.         // Add query arguments: action, post, nonce
    12.         $url = add_query_arg(
    13.             [
    14.             'action' => 'wporg_frontend_delete',
    15.             'post'   => get_the_ID(),
    16.             'nonce'  => wp_create_nonce( 'wporg_frontend_delete' ),
    17.             ], home_url()
    18.         );
    20.         return $content . ' <a href="' . esc_url( $url ) . '">' . esc_html__( 'Delete Post', 'wporg' ) . '</a>';
    21.     }
    23.     return null;
    24. }
    26. /**
    27.  * Request handler
    28.  */
    29. function wporg_delete_post() {
    30.     if ( isset( $_GET['action'] )
    31.    && isset( $_GET['nonce'] )
    32.    && 'wporg_frontend_delete' === $_GET['action']
    33.    && wp_verify_nonce( $_GET['nonce'], 'wporg_frontend_delete' ) ) {
    35.         // Verify we have a post id.
    36.         $post_id = ( isset( $_GET['post'] ) ) ? ( $_GET['post'] ) : ( null );
    38.         // Verify there is a post with such a number.
    39.         $post = get_post( (int) $post_id );
    40.         if ( empty( $post ) ) {
    41.             return;
    42.         }
    44.         // Delete the post.
    45.         wp_trash_post( $post_id );
    47.         // Redirect to admin page.
    48.         $redirect = admin_url( 'edit.php' );
    49.         wp_safe_redirect( $redirect );
    51.         // We are done.
    52.         die;
    53.     }
    54. }
    56. /**
    57.  * Add delete post ability
    58.  */
    59. add_action('plugins_loaded', 'wporg_add_delete_post_ability');
    61. function wporg_add_delete_post_ability() {
    62.    if ( current_user_can( 'edit_others_posts' ) ) {
    63.    /**
    64.          * Add the delete link to the end of the post content.
    65.    */
    66.    add_filter( 'the_content', 'wporg_generate_delete_link' );
    68.    /**
    69.          * Register our request handler with the init hook.
    70.    */
    71.    add_action( 'init', 'wporg_delete_post' );
    72.    }
    73. }