WordPress函数wp_signon()身份验证登录

WordPress函数wp_signon()身份验证登录

　　在 WordPress CMS内容管理系统中，wp_signon()是一个内置函数，用于将用户登录到站点。它接受一组参数，包括用户名、密码以及是否记住用户以供将来登录。

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wp_signon()函数基本语法

描述

　　显示当前帖子的永久链接

用法

<?php wp_signon( $credentials, $secure_cookie ) ?> 

参数

　　$credentials

　　（array可选）用于登录的用户信息。默认值：无

　　$secure_cookie

 　　(string|bool) – 可选。是否使用安全 cookie。Default: ''

更多默认参数

$args = array(
	'walker'            => null,
	'max_depth'         => '',
	'style'             => 'ul',
	'callback'          => null,
	'end-callback'      => null,
	'type'              => 'all',
	'page'              => '',
	'per_page'          => '',
	'avatar_size'       => 32,
	'reverse_top_level' => null,
	'reverse_children'  => '',
	'format'            => 'html5', // or 'xhtml' if no 'HTML5' theme support
	'short_ping'        => false,   // @since 3.6
	'echo'              => true     // boolean, default is true
);

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wp_signon()函数

　　wp_signon()功能是一个强大的工具，可用于将用户登录到您的 WordPress 站点。通过使用上述参数，您可以控制用户登录站点的方式（源文件可参考这里）

function wp_signon( $credentials = array(), $secure_cookie = '' ) {
	if ( empty( $credentials ) ) {
		$credentials = array(
			'user_login'    => '',
			'user_password' => '',
			'remember'      => false,
		);

		if ( ! empty( $_POST['log'] ) ) {
			$credentials['user_login'] = wp_unslash( $_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();
	}

	/**
	 * Filters 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 ) ) {
		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;
}

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如何使用wp_signon()

　　这个函数和动作可以放在主题的 functions.php 中。使用 hook init 将使其在发送标头和 cookie 之前运行，因此它可以设置登录所需的 cookie。

function custom_login() {
	$creds = array();
	$creds['user_login'] = 'example';
	$creds['user_password'] = 'plaintextpw';
	$creds['remember'] = true;
	$user = wp_signon( $creds, false );
	if ( is_wp_error($user) )
		echo $user->get_error_message();
}
// run it before the headers and cookies are sent
add_action( 'init', 'custom_login' );

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