wp_signon( array $credentials = array(), string|bool $secure_cookie = ” )

使用“记住”功能对用户进行身份验证和登录。
Authenticates and logs a user in with ‘remember’ capability.

目录锚点：#说明#参数#源码#笔记

说明（Description）

凭证是一个数组，它有“用户登录”、“用户密码”和“记住”索引。如果没有提供凭据，则将假定登录形式，并在设置时使用。各种身份验证Cookie将由此函数设置，并根据“记住”凭据是否设置为true而设置更长的时间。注意：wp_signon（）不处理设置当前用户的操作。这意味着，如果函数是在激发’init’钩子之前调用的，则is_user_logged_in（）将在该点之前计算为false。如果需要将is_user_logged_in（）与wp_signon（）结合使用，则应显式调用wp_set_current_user（）。

参数（Parameters）

源码（Source）

/**
 * Authenticate user with remember capability.
 *
 * The credentials is an array that has 'user_login', 'user_password', and
 * 'remember' indices. If the credentials is not given, then the log in form
 * will be assumed and used if set.
 *
 * The various authentication cookies will be set by this function and will be
 * set for a longer period depending on if the 'remember' credential is set to
 * true.
 *
 * @since 2.5.0
 *
 * @global string $auth_secure_cookie
 *
 * @param array       $credentials   Optional. User info in order to sign on.
 * @param string|bool $secure_cookie Optional. Whether to use secure cookie.
 * @return WP_User|WP_Error WP_User on success, WP_Error on failure.
 */
function wp_signon( $credentials = array(), $secure_cookie = '' ) {
	if ( empty($credentials) ) {
		if ( ! empty($_POST['log']) )
			$credentials['user_login'] = $_POST['log'];
		if ( ! empty($_POST['pwd']) )
			$credentials['user_password'] = $_POST['pwd'];
		if ( ! empty($_POST['rememberme']) )
			$credentials['remember'] = $_POST['rememberme'];
	}

	if ( !empty($credentials['remember']) )
		$credentials['remember'] = true;
	else
		$credentials['remember'] = false;

	/**
	 * Fires before the user is authenticated.
	 *
	 * The variables passed to the callbacks are passed by reference,
	 * and can be modified by callback functions.
	 *
	 * @since 1.5.1
	 *
	 * @todo Decide whether to deprecate the wp_authenticate action.
	 *
	 * @param string $user_login    Username, passed by reference.
	 * @param string $user_password User password, passed by reference.
	 */
	do_action_ref_array( 'wp_authenticate', array( &$credentials['user_login'], &$credentials['user_password'] ) );

	if ( '' === $secure_cookie )
		$secure_cookie = is_ssl();

	/**
	 * Filter whether to use a secure sign-on cookie.
	 *
	 * @since 3.1.0
	 *
	 * @param bool  $secure_cookie Whether to use a secure sign-on cookie.
	 * @param array $credentials {
 	 *     Array of entered sign-on data.
 	 *
 	 *     @type string $user_login    Username.
 	 *     @type string $user_password Password entered.
	 *     @type bool   $remember      Whether to 'remember' the user. Increases the time
	 *                                 that the cookie will be kept. Default false.
 	 * }
	 */
	$secure_cookie = apply_filters( 'secure_signon_cookie', $secure_cookie, $credentials );

	global $auth_secure_cookie; // XXX ugly hack to pass this to wp_authenticate_cookie
	$auth_secure_cookie = $secure_cookie;

	add_filter('authenticate', 'wp_authenticate_cookie', 30, 3);

	$user = wp_authenticate($credentials['user_login'], $credentials['user_password']);

	if ( is_wp_error($user) ) {
		if ( $user->get_error_codes() == array('empty_username', 'empty_password') ) {
			$user = new WP_Error('', '');
		}

		return $user;
	}

	wp_set_auth_cookie($user->ID, $credentials['remember'], $secure_cookie);
	/**
	 * Fires after the user has successfully logged in.
	 *
	 * @since 1.5.0
	 *
	 * @param string  $user_login Username.
	 * @param WP_User $user       WP_User object of the logged-in user.
	 */
	do_action( 'wp_login', $user->user_login, $user );
	return $user;
}

笔记（Notes）

此函数和操作可以放在函数.php主题的。