Question

is_wp_error( mixed $thing )

Check whether variable is a WordPress Error.

---

description

Returns true if $thing is an object of the WP_Error class.

---

参数

$thing

(mixed) (Required) Check if unknown variable is a WP_Error object.

---

返回值

(bool) True, if WP_Error. False, if not WP_Error.

---

源代码

File: wp-includes/load.php

function is_wp_error( $thing ) {
	return ( $thing instanceof WP_Error );
}

---

更新日志

Version	description
2.1.0	Introduced.

---

相关函数

Used By

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• wp-admin/includes/media.php: media_sideload_image()
• wp-admin/includes/media.php: media_handle_upload()
• wp-admin/includes/media.php: media_handle_sideload()
• wp-admin/includes/post.php: wp_create_post_autosave()
• wp-admin/includes/post.php: post_preview()
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• wp-includes/category-template.php: wp_tag_cloud()
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• wp-includes/category-template.php: the_tags()
• wp-includes/category-template.php: term_description()
• wp-includes/category-template.php: get_the_terms()
• wp-includes/category-template.php: get_category_link()
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• wp-includes/category.php: get_categories()
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• wp-includes/category.php: get_category_by_path()
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• wp-includes/class-wp-image-editor-imagick.php: WP_Image_Editor_Imagick::set_quality()
• wp-includes/load.php: wp_set_wpdb_vars()
• wp-includes/class-http.php: WP_Http::_dispatch_request()
• wp-includes/class-http.php: WP_Http::request()
• wp-includes/deprecated.php: url_is_accessable_via_ssl()
• wp-includes/functions.php: wp_send_json_error()
• wp-includes/functions.php: _default_wp_die_handler()
• wp-includes/functions.php: wp_remote_fopen()
• wp-includes/deprecated.php: wp_get_http()
• wp-includes/functions.php: wp_get_http_headers()
• wp-includes/widgets/class-wp-widget-rss.php: WP_Widget_RSS::widget()
• wp-includes/widgets.php: wp_widget_rss_output()
• wp-includes/widgets.php: wp_widget_rss_process()
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• wp-includes/taxonomy.php: wp_delete_term()
• wp-includes/taxonomy.php: get_term_by()
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• wp-includes/taxonomy.php: get_term_to_edit()
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• wp-includes/user.php: wp_signon()
• wp-includes/user.php: wp_authenticate_username_password()
• wp-includes/pluggable-deprecated.php: wp_login()
• wp-includes/class-wp-image-editor-gd.php: WP_Image_Editor_GD::resize()
• wp-includes/class-wp-image-editor-gd.php: WP_Image_Editor_GD::multi_resize()
• wp-includes/class-wp-image-editor-gd.php: WP_Image_Editor_GD::save()
• wp-includes/nav-menu-template.php: wp_nav_menu()
• wp-includes/post-template.php: get_post_class()
• wp-includes/post-template.php: get_body_class()
• wp-includes/media.php: wp_get_image_editor()
• wp-includes/media.php: image_make_intermediate_size()
• wp-includes/post.php: wp_get_post_parent_id()
• wp-includes/canonical.php: redirect_canonical()
• wp-includes/revision.php: _wp_put_post_revision()
• wp-includes/revision.php: wp_restore_post_revision()
• wp-includes/ms-functions.php: maybe_add_existing_user_to_blog()
• wp-includes/ms-functions.php: wpmu_activate_signup()
• wp-includes/ms-functions.php: wpmu_create_user()
• wp-includes/class-wp-http-ixr-client.php: WP_HTTP_IXR_Client::query()
• wp-includes/bookmark.php: get_bookmark_field()
• wp-includes/post-formats.php: get_post_format_link()
• wp-includes/nav-menu.php: wp_setup_nav_menu_item()
• wp-includes/nav-menu.php: is_nav_menu_item()
• wp-includes/nav-menu.php: wp_delete_nav_menu()
• wp-includes/nav-menu.php: wp_update_nav_menu_object()
• wp-includes/nav-menu.php: wp_update_nav_menu_item()
• wp-includes/nav-menu.php: wp_get_nav_menu_items()
• wp-includes/nav-menu.php: wp_get_nav_menu_object()
• wp-includes/nav-menu.php: is_nav_menu()
• wp-includes/rss.php: _fetch_remote_file()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_editPost()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::blogger_newPost()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_newPost()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_editComment()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_newComment()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_newCategory()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_newTerm()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_editTerm()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_deleteTerm()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getTerm()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getTerms()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_editProfile()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::_insert_post()
• wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::login()
• wp-includes/class-wp-customize-widgets.php: WP_Customize_Widgets::wp_ajax_update_widget()
• wp-includes/comment.php: trackback()
• wp-includes/comment.php: wp_new_comment()
• wp-includes/comment.php: discover_pingback_server_uri()
• wp-includes/class-wp-editor.php: _WP_Editors::editor_settings()
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User Contributed Notes

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   Example

   
   if ( is_wp_error( $result ) ) {
   	$error_string = $result->get_error_message();
   	echo '<div id="message" class="error"><p>' . $error_string . '</p></div>';
   }
   
   

The WP_Error class:
https://developer.wordpress.org/reference/classes/wp_error/