the given answers have good intentions. But are not good. There are more parameters to the filter function call, 4 to be exact.
this worked for me for the message (i wanted to replace username with user email)
note we have a multi site page. You might want to replace network_site_url with get_site_url()
typically in your functions.php of your wordpress stheme:
add_filter("retrieve_password_message", "mapp_custom_password_reset", 99, 4);
function mapp_custom_password_reset($message, $key, $user_login, $user_data ) {
$message = "Someone has requested a password reset for the following account:
" . sprintf(__('%s'), $user_data->user_email) . "
If this was a mistake, just ignore this email and nothing will happen.
To reset your password, visit the following address:
" . '<' . network_site_url("wp-login.php?action=rp&key=$key&login=" . rawurlencode($user_login), 'login') . ">\r\n" . "
If you have any further issues, please email us to [email protected]
The Myapp Team";
return $message;
}
bonus: change email title / subject
add_filter( 'retrieve_password_title',
function( $title )
{
$title = __( 'Password reset for myapp.org' );
return $title;
}
);