wp_send_json_error( mixed $data = null, int $status_code = null )

Send a JSON response back to an Ajax request, indicating failure.

Contents

Description Description

If the $data parameter is a WP_Error object, the errors within the object are processed and output as an array of error codes and corresponding messages. All other types are output without further processing.

Parameters Parameters

$data

(mixed) (Optional) Data to encode as JSON, then print and die.

Default value: null

$status_code

(int) (Optional) The HTTP status code to output.

Default value: null

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Source Source

File: wp-includes/functions.php 

function wp_send_json_error( $data = null, $status_code = null ) {
	$response = array( 'success' => false );

	if ( isset( $data ) ) {
		if ( is_wp_error( $data ) ) {
			$result = array();
			foreach ( $data->errors as $code => $messages ) {
				foreach ( $messages as $message ) {
					$result[] = array(
						'code'    => $code,
						'message' => $message,
					);
				}
			}

			$response['data'] = $result;
		} else {
			$response['data'] = $data;
		}
	}

	wp_send_json( $response, $status_code );
}

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Changelog Changelog

Changelog
Version Description
4.7.0 The $status_code parameter was added.
4.1.0 The $data parameter is now processed if a WP_Error object is passed in.
3.5.0 Introduced.

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Uses Uses

Uses
Uses Description
wp-includes/functions.php: wp_send_json()

Send a JSON response back to an Ajax request.
wp-includes/load.php: is_wp_error()

Check whether variable is a WordPress Error.

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Used By Used By

Used By
Used By Description
wp-admin/includes/ajax-actions.php: wp_ajax_media_create_image_subsizes()

Ajax handler for creating missing image sub-sizes for just uploaded images.
wp-admin/includes/ajax-actions.php: wp_ajax_health_check_get_sizes()

Ajax handler for site health check to get directories and database sizes.
wp-admin/includes/ajax-actions.php: wp_ajax_health_check_dotorg_communication()

Ajax handler for site health checks on server communication.
wp-admin/includes/ajax-actions.php: wp_ajax_health_check_is_in_debug_mode()

Ajax handler for site health checks on debug mode.
wp-admin/includes/ajax-actions.php: wp_ajax_health_check_background_updates()

Ajax handler for site health checks on background updates.
wp-admin/includes/ajax-actions.php: wp_ajax_health_check_loopback_requests()

Ajax handler for site health checks on loopback requests.
wp-admin/includes/ajax-actions.php: wp_ajax_health_check_site_status_result()

Ajax handler for site health check to update the result status.
wp-admin/includes/privacy-tools.php: wp_privacy_process_personal_data_export_page()

Intercept personal data exporter page Ajax responses in order to assemble the personal data export file.
wp-admin/includes/privacy-tools.php: wp_privacy_generate_personal_data_export_file()

Generate the personal data export file.
wp-admin/includes/privacy-tools.php: wp_privacy_process_personal_data_erasure_page()

Mark erasure requests as completed after processing is finished.
wp-admin/includes/ajax-actions.php: wp_ajax_wp_privacy_export_personal_data()

Ajax handler for exporting a user’s personal data.
wp-admin/includes/ajax-actions.php: wp_ajax_wp_privacy_erase_personal_data()

Ajax handler for erasing personal data.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::handle_load_themes_request()

Load themes into the theme browsing/installation UI.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::handle_override_changeset_lock_request()

Removes changeset lock when take over request is sent via Ajax.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::handle_dismiss_autosave_or_lock_request()

Delete a given auto-draft changeset or the autosave revision for a given changeset or delete changeset lock.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::handle_changeset_trash_request()

Handle request to trash a changeset.
wp-admin/includes/ajax-actions.php: wp_ajax_edit_theme_plugin_file()

Ajax handler for editing a theme or plugin file.
wp-admin/includes/ajax-actions.php: wp_ajax_get_community_events()

Handles AJAX requests for community events
wp-includes/class-wp-customize-nav-menus.php: WP_Customize_Nav_Menus::ajax_insert_auto_draft_post()

Ajax handler for adding a new auto-draft post.
wp-admin/includes/ajax-actions.php: wp_ajax_search_install_plugins()

Ajax handler for searching plugins to install.
wp-admin/includes/ajax-actions.php: wp_ajax_delete_plugin()

Ajax handler for deleting a plugin.
wp-admin/includes/ajax-actions.php: wp_ajax_search_plugins()

Ajax handler for searching plugins.
wp-admin/includes/ajax-actions.php: wp_ajax_install_theme()

Ajax handler for installing a theme.
wp-admin/includes/ajax-actions.php: wp_ajax_update_theme()

Ajax handler for updating a theme.
wp-admin/includes/ajax-actions.php: wp_ajax_delete_theme()

Ajax handler for deleting a theme.
wp-admin/includes/ajax-actions.php: wp_ajax_install_plugin()

Ajax handler for installing a plugin.
wp-includes/customize/class-wp-customize-selective-refresh.php: WP_Customize_Selective_Refresh::handle_render_partials_request()

Handles the Ajax request to return the rendered partials for the requested placements.
wp-admin/includes/ajax-actions.php: wp_ajax_save_wporg_username()

Ajax handler for saving the user’s WordPress.org username.
wp-includes/class-wp-customize-nav-menus.php: WP_Customize_Nav_Menus::ajax_load_available_items()

Ajax handler for loading available menu items.
wp-includes/class-wp-customize-nav-menus.php: WP_Customize_Nav_Menus::ajax_search_available_items()

Ajax handler for searching available menu items.
wp-admin/includes/ajax-actions.php: wp_ajax_crop_image()

Ajax handler for cropping an image.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::refresh_nonces()

Refresh nonces for the current preview.
wp-includes/deprecated.php: wp_ajax_press_this_add_category()

Ajax handler for creating new category from Press This.
wp-admin/includes/ajax-actions.php: wp_ajax_update_plugin()

Ajax handler for updating a plugin.
wp-includes/deprecated.php: wp_ajax_press_this_save_post()

Ajax handler for saving a post from Press This.
wp-admin/includes/ajax-actions.php: wp_ajax_destroy_sessions()

Ajax handler for destroying multiple open sessions for a user.
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Ajax handler for adding custom background context to an attachment.
wp-admin/includes/ajax-actions.php: wp_ajax_parse_embed()

Apply [embed] Ajax handlers to a string.
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wp-admin/includes/ajax-actions.php: wp_ajax_set_attachment_thumbnail()

Ajax handler for setting the featured image for an attachment.
wp-admin/includes/ajax-actions.php: wp_ajax_save_attachment_order()

Ajax handler for saving the attachment order.
wp-admin/includes/ajax-actions.php: wp_ajax_send_attachment_to_editor()

Ajax handler for sending an attachment to the editor.
wp-admin/includes/ajax-actions.php: wp_ajax_send_link_to_editor()

Ajax handler for sending a link to the editor.
wp-admin/includes/ajax-actions.php: wp_ajax_heartbeat()

Ajax handler for the Heartbeat API.
wp-admin/includes/ajax-actions.php: wp_ajax_get_revision_diffs()

Ajax handler for getting revision diffs.
wp-admin/includes/ajax-actions.php: wp_ajax_save_user_color_scheme()

Ajax handler for auto-saving the selected color scheme for a user’s own profile.
wp-admin/includes/ajax-actions.php: wp_ajax_query_themes()

Ajax handler for getting themes from themes_api().
wp-admin/includes/ajax-actions.php: wp_ajax_wp_fullscreen_save_post()

Ajax handler for saving posts from the fullscreen editor.
wp-admin/includes/ajax-actions.php: wp_ajax_get_attachment()

Ajax handler for getting an attachment.
wp-admin/includes/ajax-actions.php: wp_ajax_query_attachments()

Ajax handler for querying attachments.
wp-admin/includes/ajax-actions.php: wp_ajax_save_attachment()

Ajax handler for updating attachment attributes.
wp-admin/includes/ajax-actions.php: wp_ajax_save_attachment_compat()

Ajax handler for saving backward compatible attachment attributes.
wp-admin/includes/ajax-actions.php: wp_ajax_find_posts()

Ajax handler for querying posts for the Find Posts modal.
wp-admin/includes/class-custom-image-header.php: Custom_Image_Header::ajax_header_crop()

Gets attachment uploaded by Media Manager, crops it, then saves it as a new object. Returns JSON-encoded object details.
wp-admin/includes/class-custom-image-header.php: Custom_Image_Header::ajax_header_add()

Given an attachment ID for a header image, updates its “last used” timestamp to now.
wp-admin/includes/class-custom-image-header.php: Custom_Image_Header::ajax_header_remove()

Given an attachment ID for a header image, unsets it as a user-uploaded header image for the current theme.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::save()

Handle customize_save WP Ajax request to save/update a changeset.
wp-includes/class-wp-customize-widgets.php: WP_Customize_Widgets::wp_ajax_update_widget()

Updates widget settings asynchronously.
Show 53 more used by Hide more used by

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User Contributed Notes User Contributed Notes

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    Contributed by Codex —

    Example

    jQuery( document ).ready( function() {

	jQuery( '#btn_save' ).on( 'click', function( event ) {
		event.preventDefault();
		jQuery.post( pluginUrl + 'ajax/save_field.php', jQuery( '#my-form' ).serialize(), function( data ) {						
			alert( data.success );
		} );
	} );
} );

    save_field.php

    <?php
$nonce = $_POST['_wpnonce_name'];
if ( empty( $_POST ) || ! wp_verify_nonce( $nonce, 'my-nonce' ) ) {
	wp_send_json_error(); // sends json_encoded success=false
}

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