WordPress 6.0 新增了两个和密码找回邮件相关的钩子：
send_retrieve_password_email可用于过滤是否发送找回密码邮件retrieve_password_notification_email可用于过滤发送给用户的重置密码通知邮件的内容。
为了与一些类似的过滤器（如send_password_change_email或 send_email_change_email）保持一致，并获得更大的灵活性，请将$user_login和$user_data参数直接传递给新的send_retrieve_password_email和retrieve_password_notification_email过滤器。
apply_filters( 'send_retrieve_password_email', true, $user_login, $user_data );apply_filters( 'retrieve_password_notification_email', $defaults, $key, $user_login, $user_data );禁用密码找回邮件
以下代码可以全局禁用发送密码找回邮件，也可以按照提示通过 $user_login, $user_data 两个参数来添加限制条件：
function wpdax_disable_retrieve_password_email( $user_login, $user_data ){
// 如果你希望符合某类条件的才禁止发送，那你可以通过 $user_login, $user_data 这两个参数来做判断
return false;
}
add_filter( 'send_retrieve_password_email', 'wpdax_disable_retrieve_password_email', 10, 2 );修改密码找回邮件的内容
retrieve_password_notification_email 承接的 $defaults 内容包括邮件的收件人、标题、信息和Headers头部信息：
$defaults = array(
'to' => $user_email,
'subject' => $title,
'message' => $message,
'headers' => '',
);所以，retrieve_password_notification_email 是可以直接修改以上四项内容的。代码范例如下
function wpdx_filter_retrieve_password_notification_email( $defaults, $key, $user_login, $user_data ){
// 可以通过 $key, $user_login, $user_data 三个参数来获取和传递一些用户信息值
// 收件人邮箱 to 不能修改，否则他会收不到
// $defaults['title'] = '自定义标题';
// $defaults['message'] = '自定义消息';
// $defaults['headers'] = '自定义headers'; //一般情况下不需要修改
return $defaults;
}
add_filter( 'retrieve_password_notification_email', 'wpdx_filter_retrieve_password_notification_email', 10, 4 );在下面的函数代码中，我们可以看到还有两个钩子：
retrieve_password_title专门用于修改找回密码邮件的标题retrieve_password_message专门用于修改找回密码邮件的消息
所以，你可以根据实际需要，选择对应的钩子。
至于实际如何修改，可以参考WP内核的 /wp-includes/user.php 文件对应的下列函数（以下为 WordPress 6.0 版本）：
/**
* Handles sending a password retrieval email to a user.
*
* @since 2.5.0
* @since 5.7.0 Added `$user_login` parameter.
*
* @global wpdb $wpdb WordPress database abstraction object.
* @global PasswordHash $wp_hasher Portable PHP password hashing framework.
*
* @param string $user_login Optional. Username to send a password retrieval email for.
* Defaults to `$_POST['user_login']` if not set.
* @return true|WP_Error True when finished, WP_Error object on error.
*/
function retrieve_password( $user_login = null ) {
$errors = new WP_Error();
$user_data = false;
// Use the passed $user_login if available, otherwise use $_POST['user_login'].
if ( ! $user_login && ! empty( $_POST['user_login'] ) ) {
$user_login = $_POST['user_login'];
}
if ( empty( $user_login ) ) {
$errors->add( 'empty_username', __( '<strong>Error</strong>: Please enter a username or email address.' ) );
} elseif ( strpos( $user_login, '@' ) ) {
$user_data = get_user_by( 'email', trim( wp_unslash( $user_login ) ) );
if ( empty( $user_data ) ) {
$errors->add( 'invalid_email', __( '<strong>Error</strong>: There is no account with that username or email address.' ) );
}
} else {
$user_data = get_user_by( 'login', trim( wp_unslash( $user_login ) ) );
}
/**
* Filters the user data during a password reset request.
*
* Allows, for example, custom validation using data other than username or email address.
*
* @since 5.7.0
*
* @param WP_User|false $user_data WP_User object if found, false if the user does not exist.
* @param WP_Error $errors A WP_Error object containing any errors generated
* by using invalid credentials.
*/
$user_data = apply_filters( 'lostpassword_user_data', $user_data, $errors );
/**
* Fires before errors are returned from a password reset request.
*
* @since 2.1.0
* @since 4.4.0 Added the `$errors` parameter.
* @since 5.4.0 Added the `$user_data` parameter.
*
* @param WP_Error $errors A WP_Error object containing any errors generated
* by using invalid credentials.
* @param WP_User|false $user_data WP_User object if found, false if the user does not exist.
*/
do_action( 'lostpassword_post', $errors, $user_data );
/**
* Filters the errors encountered on a password reset request.
*
* The filtered WP_Error object may, for example, contain errors for an invalid
* username or email address. A WP_Error object should always be returned,
* but may or may not contain errors.
*
* If any errors are present in $errors, this will abort the password reset request.
*
* @since 5.5.0
*
* @param WP_Error $errors A WP_Error object containing any errors generated
* by using invalid credentials.
* @param WP_User|false $user_data WP_User object if found, false if the user does not exist.
*/
$errors = apply_filters( 'lostpassword_errors', $errors, $user_data );
if ( $errors->has_errors() ) {
return $errors;
}
if ( ! $user_data ) {
$errors->add( 'invalidcombo', __( '<strong>Error</strong>: There is no account with that username or email address.' ) );
return $errors;
}
/**
* Filters whether to send the retrieve password email.
*
* Return false to disable sending the email.
*
* @since 6.0.0
*
* @param bool $send Whether to send the email.
* @param string $user_login The username for the user.
* @param WP_User $user_data WP_User object.
*/
if ( ! apply_filters( 'send_retrieve_password_email', true, $user_login, $user_data ) ) {
return true;
}
// Redefining user_login ensures we return the right case in the email.
$user_login = $user_data->user_login;
$user_email = $user_data->user_email;
$key = get_password_reset_key( $user_data );
if ( is_wp_error( $key ) ) {
return $key;
}
// Localize password reset message content for user.
$locale = get_user_locale( $user_data );
$switched_locale = switch_to_locale( $locale );
if ( is_multisite() ) {
$site_name = get_network()->site_name;
} else {
/*
* The blogname option is escaped with esc_html on the way into the database
* in sanitize_option. We want to reverse this for the plain text arena of emails.
*/
$site_name = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
}
$message = __( 'Someone has requested a password reset for the following account:' ) . "\r\n\r\n";
/* translators: %s: Site name. */
$message .= sprintf( __( 'Site Name: %s' ), $site_name ) . "\r\n\r\n";
/* translators: %s: User login. */
$message .= sprintf( __( 'Username: %s' ), $user_login ) . "\r\n\r\n";
$message .= __( 'If this was a mistake, ignore this email and nothing will happen.' ) . "\r\n\r\n";
$message .= __( 'To reset your password, visit the following address:' ) . "\r\n\r\n";
$message .= network_site_url( "wp-login.php?action=rp&key=$key&login=" . rawurlencode( $user_login ), 'login' ) . '&wp_lang=' . $locale . "\r\n\r\n";
if ( ! is_user_logged_in() ) {
$requester_ip = $_SERVER['REMOTE_ADDR'];
if ( $requester_ip ) {
$message .= sprintf(
/* translators: %s: IP address of password reset requester. */
__( 'This password reset request originated from the IP address %s.' ),
$requester_ip
) . "\r\n";
}
}
/* translators: Password reset notification email subject. %s: Site title. */
$title = sprintf( __( '[%s] Password Reset' ), $site_name );
/**
* Filters the subject of the password reset email.
*
* @since 2.8.0
* @since 4.4.0 Added the `$user_login` and `$user_data` parameters.
*
* @param string $title Email subject.
* @param string $user_login The username for the user.
* @param WP_User $user_data WP_User object.
*/
$title = apply_filters( 'retrieve_password_title', $title, $user_login, $user_data );
/**
* Filters the message body of the password reset mail.
*
* If the filtered message is empty, the password reset email will not be sent.
*
* @since 2.8.0
* @since 4.1.0 Added `$user_login` and `$user_data` parameters.
*
* @param string $message Email message.
* @param string $key The activation key.
* @param string $user_login The username for the user.
* @param WP_User $user_data WP_User object.
*/
$message = apply_filters( 'retrieve_password_message', $message, $key, $user_login, $user_data );
// Short-circuit on falsey $message value for backwards compatibility.
if ( ! $message ) {
return true;
}
/*
* Wrap the single notification email arguments in an array
* to pass them to the retrieve_password_notification_email filter.
*/
$defaults = array(
'to' => $user_email,
'subject' => $title,
'message' => $message,
'headers' => '',
);
/**
* Filters the contents of the reset password notification email sent to the user.
*
* @since 6.0.0
*
* @param array $defaults {
* The default notification email arguments. Used to build wp_mail().
*
* @type string $to The intended recipient - user email address.
* @type string $subject The subject of the email.
* @type string $message The body of the email.
* @type string $headers The headers of the email.
* }
* @type string $key The activation key.
* @type string $user_login The username for the user.
* @type WP_User $user_data WP_User object.
*/
$notification_email = apply_filters( 'retrieve_password_notification_email', $defaults, $key, $user_login, $user_data );
if ( $switched_locale ) {
restore_previous_locale();
}
if ( is_array( $notification_email ) ) {
// Force key order and merge defaults in case any value is missing in the filtered array.
$notification_email = array_merge( $defaults, $notification_email );
} else {
$notification_email = $defaults;
}
list( $to, $subject, $message, $headers ) = array_values( $notification_email );
$subject = wp_specialchars_decode( $subject );
if ( ! wp_mail( $to, $subject, $message, $headers ) ) {
$errors->add(
'retrieve_password_email_failure',
sprintf(
/* translators: %s: Documentation URL. */
__( '<strong>Error</strong>: The email could not be sent. Your site may not be correctly configured to send emails. <a href="%s">Get support for resetting your password</a>.' ),
esc_url( __( 'https://wordpress.org/support/article/resetting-your-password/' ) )
)
);
return $errors;
}
return true;
}来源：
https://www.wpdaxue.com/retrieve-password-notification-email.html
