maybe_add_existing_user_to_blog()

Add a new user to a blog by visiting /newbloguser/{key}/.

Description

This will only work when the user’s details are saved as an option keyed as ‘new_user_{key}’, where ‘{key}’ is a hash generated for the user to be added, as when a user is invited through the regular WP Add User interface.

Source

File: wp-includes/ms-functions.php 

function maybe_add_existing_user_to_blog() {
	if ( false === strpos( $_SERVER[ 'REQUEST_URI' ], '/newbloguser/' ) )
		return;

	$parts = explode( '/', $_SERVER[ 'REQUEST_URI' ] );
	$key = array_pop( $parts );

	if ( $key == '' )
		$key = array_pop( $parts );

	$details = get_option( 'new_user_' . $key );
	if ( !empty( $details ) )
		delete_option( 'new_user_' . $key );

	if ( empty( $details ) || is_wp_error( add_existing_user_to_blog( $details ) ) )
		wp_die( sprintf(__('An error occurred adding you to this site. Back to the <a href="%s">homepage</a>.'), home_url() ) );

	wp_die( sprintf( __( 'You have been added to this site. Please visit the <a href="%s">homepage</a> or <a href="%s">log in</a> using your username and password.' ), home_url(), admin_url() ), __( 'ClassicPress &rsaquo; Success' ), array( 'response' => 200 ) );
}

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Related

Uses

Uses
Uses Description
wp-includes/l10n.php: __()

Retrieve the translation of $text.
wp-includes/link-template.php: home_url()

Retrieves the URL for the current site where the front end is accessible.
wp-includes/link-template.php: admin_url()

Retrieves the URL to the admin area for the current site.
wp-includes/option.php: delete_option()

Removes option by name. Prevents removal of protected ClassicPress options.
wp-includes/option.php: get_option()

Retrieves an option value based on an option name.
wp-includes/ms-functions.php: add_existing_user_to_blog()

Add a user to a blog based on details from maybe_add_existing_user_to_blog().
wp-includes/load.php: is_wp_error()

Check whether variable is a ClassicPress Error.
wp-includes/functions.php: wp_die()

Kill ClassicPress execution and display HTML message with error message.
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Changelog

Changelog
Version Description
WP-MU Introduced. (3.0.0)