你可以试试这个。https://gist.github.com/butlerblog/d3cd7df4ead4736521d1如果链接失效，代码如下：
<?php
/*
This code snippet can be added to your functions.php file (without the <?php)
to add a query string to the login link emailed to the user upon registration
which when clicked will validate the user, log them in, and direct them to
the home page.
*/
/**
* This first function is hooked to the \'user_register\' action which fires
* during the new user registration process. The process here gets some of
* the data from the registration process that we will use later in the
* new user registration email. It also creates and stores an activation
* key that can be used as an extra security step.
*/
add_action( \'user_register\', \'get_register_data_for_auto_login\' );
function get_register_data_for_auto_login( $user_id ) {
// Create array that can be picked up later for the email.
global $my_array;
$my_array[\'ID\'] = $user_id;
// Get the username, add it to the array.
if ( isset( $_POST[\'user_login\'] ) ) {
$my_array[\'user_login\'] = $_POST[\'user_login\'];
} else {
$user_info = get_userdata( $user_id );
$my_array[\'user_login\'] = $user_info->user_login;
}
// Create an activation key, add to array.
$my_array[\'activation_key\'] = md5( microtime() . rand() );
update_user_meta( $user_id, \'auto_log_key\', $my_array[\'activation_key\'] );
}
/**
* This is a filter function that filters the email content as it is being
* handled by wp_mail(). I chose to do this rather than set up a function for
* the new user registration email because that would need to be done as a
* plugin, since that function is a pluggable function. So this method checks
* the email subject line to see if it is the new registration email. If it is
* it replaces the original login link with the login link plus a query string
* containing the user\'s ID, username, and activation key (from the previous
* function above).
*/
add_filter( \'wp_mail\', \'set_up_auto_login_link\' );
function set_up_auto_login_link( $atts ) {
// Check if email subject contains "Your username and password".
if ( isset ( $atts [\'subject\'] ) && $atts[\'subject\'] = \'Your username and password\' ) {
if ( isset( $atts[\'message\'] ) ) {
// Pick up the global array of user info from \'user_register\' action.
global $my_array;
// Assemble the data for the query string.
$qstr = \'?id=\' . $my_array[\'ID\'] . \'&u=\' . $my_array[\'user_login\'] . \'&k=\' . $my_array[\'activation_key\'];
// Prepare data for search/replace on the login link (to add the query string).
$old = \'/wp-login.php\';
$new = \'/wp-login.php\' . $qstr;
// Replace the original login link with the new one containing query string data for auto login.
$atts[\'message\'] = str_replace( $old, $new, $atts[\'message\'] );
}
}
return $atts;
}
/**
* This action is hooked to \'init\' which fires right away. The attached function
* will look to see if the query string parameters we created for doing auto login
* are there and if they are, it will validate them. To keep this process from
* being a giant security hole and allowing anyone with a user ID to become logged
* in, all three elements must be present and must match the user account:
* User ID, username, and the activation key.
*
* @todo We could look for a better option that only fires on the wp-login.php.
*/
add_action( \'init\', \'auto_log_user_in\' );
function auto_log_user_in() {
// If ID, user, and key are all present.
if ( isset( $_GET[\'id\'] )
&& isset( $_GET[\'u\'] )
&& isset( $_GET[\'k\'] ) ) {
// Get the query string values.
$user_id = $_GET[\'id\'];
$user_login = $_GET[\'u\'];
$activation = $_GET[\'k\'];
// Get the user data for validation.
$chk_user = get_user_by( \'id\', $user_id );
// If a user is returned and it\'s not an admin, validate and login.
if ( $chk_user && ! user_can( $chk_user->ID, \'manage_options\' ) ) {
if ( $chk_user->user_login == $user_login && $chk_user->auto_log_key == $activation ) {
wp_set_current_user( $chk_user->ID, $user_login );
wp_set_auth_cookie( $chk_user->ID );
do_action( \'wp_login\', $user_login );
wp_redirect( home_url() );
exit();
}
}
}
}
