Wordpress 如何在admin_init hook回调中检测自定义post类型？

或者我应该使用不同的钩子？主要是，我试图仅在管理中执行一些操作，并且仅对一些自定义帖子执行这些操作。

此方法很简单：

/**
 * Based on http://wordpress.stackexchange.com/a/59999/12615
 */

add_action( 'admin_head', 'wpse_59652_list_terms_exclusions' );

function wpse_59652_list_terms_exclusions() {
    global $current_screen;

    if( 'post' != $current_screen->post_type )
        return;

    // Do your stuff
}

另一个：

/**
 * Based on http://wordpress.stackexchange.com/a/54279/12615
 */

add_action( 'admin_notices', 'wpse_54258_display_error_message' );

function wpse_54258_display_error_message() { 
    global $post;
    if( !isset( $post ) || 'page' != $post->post_type )
        return;

    ?>
        <div class="error fade">This is a "page" post type</div>
    <?php
}

---

这里有一个函数，您可以毫无问题地使用它

function admin_post_type () {
    global $post, $parent_file, $typenow, $current_screen, $pagenow;

    $post_type = NULL;

    if($post && (property_exists($post, 'post_type') || method_exists($post, 'post_type')))
        $post_type = $post->post_type;

    if(empty($post_type) && !empty($current_screen) && (property_exists($current_screen, 'post_type') || method_exists($current_screen, 'post_type')) && !empty($current_screen->post_type))
        $post_type = $current_screen->post_type;

    if(empty($post_type) && !empty($typenow))
        $post_type = $typenow;

    if(empty($post_type) && function_exists('get_current_screen'))
        $post_type = get_current_screen();

    if(empty($post_type) && isset($_REQUEST['post']) && !empty($_REQUEST['post']) && function_exists('get_post_type') && $get_post_type = get_post_type((int)$_REQUEST['post']))
        $post_type = $get_post_type;

    if(empty($post_type) && isset($_REQUEST['post_type']) && !empty($_REQUEST['post_type']))
        $post_type = sanitize_key($_REQUEST['post_type']);

    if(empty($post_type) && 'edit.php' == $pagenow)
        $post_type = 'post';

    return $post_type;
}

我让它灵活、快速、准确。你可以根据需要扩展它

function admin_post_type () {
    global $post, $parent_file, $typenow, $current_screen, $pagenow;

    $post_type = NULL;

    if($post && (property_exists($post, 'post_type') || method_exists($post, 'post_type')))
        $post_type = $post->post_type;

    if(empty($post_type) && !empty($current_screen) && (property_exists($current_screen, 'post_type') || method_exists($current_screen, 'post_type')) && !empty($current_screen->post_type))
        $post_type = $current_screen->post_type;

    if(empty($post_type) && !empty($typenow))
        $post_type = $typenow;

    if(empty($post_type) && function_exists('get_current_screen'))
        $post_type = get_current_screen();

    if(empty($post_type) && isset($_REQUEST['post']) && !empty($_REQUEST['post']) && function_exists('get_post_type') && $get_post_type = get_post_type((int)$_REQUEST['post']))
        $post_type = $get_post_type;

    if(empty($post_type) && isset($_REQUEST['post_type']) && !empty($_REQUEST['post_type']))
        $post_type = sanitize_key($_REQUEST['post_type']);

    if(empty($post_type) && 'edit.php' == $pagenow)
        $post_type = 'post';

    return $post_type;
}