usernames are now considered invalid * * @param string $username Username. * @return bool Whether username given is valid */ function validate_username( $username ) { $sanitized = sanitize_user( $username, true ); $valid = ( $sanitized == $username && ! empty( $sanitized ) ); /** * Filters whether the provided username is valid or not. * * @since 2.0.1 * * @param bool $valid Whether given username is valid. * @param string $username Username to check. */ return apply_filters( 'validate_username', $valid, $username ); } /** * Insert a user into the database. * * Most of the `$userdata` array fields have filters associated with the values. Exceptions are * 'ID', 'rich_editing', 'syntax_highlighting', 'comment_shortcuts', 'admin_color', 'use_ssl', * 'user_registered', 'user_activation_key', 'spam', and 'role'. The filters have the prefix * 'pre_user_' followed by the field name. An example using 'description' would have the filter * called 'pre_user_description' that can be hooked into. * * @since 2.0.0 * @since 3.6.0 The `aim`, `jabber`, and `yim` fields were removed as default user contact * methods for new installations. See wp_get_user_contact_methods(). * @since 4.7.0 The user's locale can be passed to `$userdata`. * @since 5.3.0 The `user_activation_key` field can be passed to `$userdata`. * @since 5.3.0 The `spam` field can be passed to `$userdata` (Multisite only). * * @global wpdb $wpdb WordPress database abstraction object. * * @param array|object|WP_User $userdata { * An array, object, or WP_User object of user data arguments. * * @type int $ID User ID. If supplied, the user will be updated. * @type string $user_pass The plain-text user password. * @type string $user_login The user's login username. * @type string $user_nicename The URL-friendly user name. * @type string $user_url The user URL. * @type string $user_email The user email address. * @type string $display_name The user's display name. * Default is the user's username. * @type string $nickname The user's nickname. * Default is the user's username. * @type string $first_name The user's first name. For new users, will be used * to build the first part of the user's display name * if `$display_name` is not specified. * @type string $last_name The user's last name. For new users, will be used * to build the second part of the user's display name * if `$display_name` is not specified. * @type string $description The user's biographical description. * @type string $rich_editing Whether to enable the rich-editor for the user. * Accepts 'true' or 'false' as a string literal, * not boolean. Default 'true'. * @type string $syntax_highlighting Whether to enable the rich code editor for the user. * Accepts 'true' or 'false' as a string literal, * not boolean. Default 'true'. * @type string $comment_shortcuts Whether to enable comment moderation keyboard * shortcuts for the user. Accepts 'true' or 'false' * as a string literal, not boolean. Default 'false'. * @type string $admin_color Admin color scheme for the user. Default 'fresh'. * @type bool $use_ssl Whether the user should always access the admin over * https. Default false. * @type string $user_registered Date the user registered. Format is 'Y-m-d H:i:s'. * @type string $user_acti