sanitize_key( string $key ): string

Sanitizes a string key.

Contents

Description

Keys are used as internal identifiers. Lowercase alphanumeric characters, dashes, and underscores are allowed.

Top ↑

Parameters

$key string Required
String key.

Top ↑

Return

string Sanitized key.

Top ↑

Source

File: wp-includes/formatting.php. View all references 

function sanitize_key( $key ) {
	$sanitized_key = '';

	if ( is_scalar( $key ) ) {
		$sanitized_key = strtolower( $key );
		$sanitized_key = preg_replace( '/[^a-z0-9_\-]/', '', $sanitized_key );
	}

	/**
	 * Filters a sanitized key string.
	 *
	 * @since 3.0.0
	 *
	 * @param string $sanitized_key Sanitized key.
	 * @param string $key           The key prior to sanitization.
	 */
	return apply_filters( 'sanitize_key', $sanitized_key, $key );
}

View on Trac View on GitHub

Top ↑

Hooks

Top ↑

Top ↑

Uses

Uses
Uses Description
apply_filters() wp-includes/plugin.php

Calls the callback functions that have been added to a filter hook.

Top ↑

Used By

Used By
Used By Description
WP_Style_Engine_CSS_Declarations::sanitize_property() wp-includes/style-engine/class-wp-style-engine-css-declarations.php

Sanitizes property names.
wp_create_user_request() wp-includes/user.php

Creates and logs a user request to perform a specific action.
_wp_personal_data_handle_actions() wp-admin/includes/privacy-tools.php

Handle list table actions.
wp_start_scraping_edited_file_errors() wp-includes/load.php

Start scraping edited file errors.
WP_Customize_Manager::handle_load_themes_request() wp-includes/class-wp-customize-manager.php

Loads themes into the theme browsing/installation UI.
WP_Theme::get_post_templates() wp-includes/class-wp-theme.php

Returns the theme’s post templates.
wp_ajax_search_install_plugins() wp-admin/includes/ajax-actions.php

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

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

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

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

Ajax handler for installing a plugin.
WP_Customize_Nav_Menu_Item_Setting::sanitize() wp-includes/customize/class-wp-customize-nav-menu-item-setting.php

Sanitize an input.
WP_Customize_Nav_Menus::ajax_load_available_items() wp-includes/class-wp-customize-nav-menus.php

Ajax handler for loading available menu items.
wp_ajax_update_plugin() wp-admin/includes/ajax-actions.php

Ajax handler for updating a plugin.
WP_Query::parse_orderby() wp-includes/class-wp-query.php

Converts the given orderby alias (if allowed) to a properly-prefixed value.
WP_Screen::get() wp-admin/includes/class-wp-screen.php

Fetches a screen object.
export_wp() wp-admin/includes/export.php

Generates the WXR export file for download.
WP_List_Table::__construct() wp-admin/includes/class-wp-list-table.php

Constructor.
update_user_status() wp-includes/ms-deprecated.php

Update the status of a user in the database.
set_screen_options() wp-admin/includes/misc.php

Saves option for number of rows when listing posts, pages, comments, etc.
post_preview() wp-admin/includes/post.php

Saves a draft or manually autosaves for the purpose of showing a post preview.
wp_ajax_heartbeat() wp-admin/includes/ajax-actions.php

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

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

Renames $_POST data from form names to DB post columns.
edit_post() wp-admin/includes/post.php

Updates an existing post with values provided in $_POST.
bulk_edit_posts() wp-admin/includes/post.php

Processes the post data for the bulk editing of posts.
wp_ajax_dismiss_wp_pointer() wp-admin/includes/ajax-actions.php

Ajax handler for dismissing a WordPress pointer.
wp_ajax_closed_postboxes() wp-admin/includes/ajax-actions.php

Ajax handler for closed post boxes.
wp_ajax_hidden_columns() wp-admin/includes/ajax-actions.php

Ajax handler for hidden columns.
wp_ajax_meta_box_order() wp-admin/includes/ajax-actions.php

Ajax handler for saving the meta box order.
wp_ajax_inline_save_tax() wp-admin/includes/ajax-actions.php

Ajax handler for quick edit saving for a term.
wp_ajax_get_tagcloud() wp-admin/includes/ajax-actions.php

Ajax handler for getting a tagcloud.
wp_ajax_nopriv_heartbeat() wp-admin/includes/ajax-actions.php

Ajax handler for the Heartbeat API in the no-privilege context.
wp_ajax_ajax_tag_search() wp-admin/includes/ajax-actions.php

Ajax handler for tag search.
WP_Comments_List_Table::prepare_items() wp-admin/includes/class-wp-comments-list-table.php
WP_Customize_Manager::__construct() wp-includes/class-wp-customize-manager.php

Constructor.
_wp_customize_include() wp-includes/theme.php

Includes and instantiates the WP_Customize_Manager class.
WP_Query::parse_query() wp-includes/class-wp-query.php

Parse a query string and set query type booleans.
WP_Tax_Query::transform_query() wp-includes/class-wp-tax-query.php

Transforms a single query, from one field to another.
WP_User_Query::prepare_query() wp-includes/class-wp-user-query.php

Prepares the query variables.
_get_last_post_time() wp-includes/post.php

Gets the timestamp of the last time any post was modified or published.
register_post_status() wp-includes/post.php

Registers a post status. Do not use before init.
register_post_type() wp-includes/post.php

Registers a post type.
_wp_preview_terms_filter() wp-includes/revision.php

Filters terms lookup to set the post format.
has_post_format() wp-includes/post-formats.php

Check if a post has any of the given formats, or any format.
set_post_format() wp-includes/post-formats.php

Assign a format to a post
wp_update_nav_menu_item() wp-includes/nav-menu.php

Saves the properties of a menu item or create a new one.
wp_xmlrpc_server::mw_editPost() wp-includes/class-wp-xmlrpc-server.php

Edits a post.
wp_xmlrpc_server::mw_newPost() wp-includes/class-wp-xmlrpc-server.php

Creates a new post.
WP_Meta_Query::get_sql() wp-includes/class-wp-meta-query.php

Generates SQL clauses to be appended to a main query.
delete_metadata() wp-includes/meta.php

Deletes metadata for the specified object.
update_metadata_by_mid() wp-includes/meta.php

Updates metadata by meta ID.
delete_metadata_by_mid() wp-includes/meta.php

Deletes metadata by meta ID.
update_meta_cache() wp-includes/meta.php

Updates the metadata cache for the specified objects.
add_metadata() wp-includes/meta.php

Adds metadata for the specified object.
update_metadata() wp-includes/meta.php

Updates metadata for the specified object. If no value already exists for the specified object ID and metadata key, the metadata will be added.
Show 51 more used by Hide more used by

Top ↑

Changelog

Changelog
Version Description
3.0.0 Introduced.

Top ↑

User Contributed Notes

  1. Skip to note 1 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 1You must log in to vote on the helpfulness of this note
    Contributed by Muhammad Jawad Abbasi — 
    <?php
$sankey = sanitize_key('Testexample1-_/[]{}');
echo $sankey;
?>

    In above code use one uppercase & other lowercase letters, number(1), dash, underscore, forward slash, brackets. So sanitize_key() function change one uppercase letter into lowercase, remove forward slash & brackets.

    Output:
    testexample1-_

You must log in before being able to contribute a note or feedback.