You can even schedule a daily automatic delete of unused accounts, specifying the max. days without login, like so (to be put in functions.php):
add_action('mydailyclearout', 'deleteinactiveusers');
function my_activation() {
if( !wp_next_scheduled( 'mydailyclearout' ) ) {
wp_schedule_event(time(), 'daily', 'mydailyclearout');
}
}
add_action('wp', 'my_activation');
function deleteinactiveusers() {
$days = 60; // days without login
$meta_value = time() - ($days * 24 * 60 * 60);
$user_query = new WP_User_Query(
array(
'meta_key' => 'wp-last-login',
'meta_value' => $meta_value,
'meta_compare' => '<',
'meta_type' => 'NUMERIC'
)
);
$users = $user_query->results;
if (!empty($users)){
foreach( $users as $user ) {
if ($user->roles[0] =="subscriber"){ // only delete subscribers
$user_email = stripslashes($user->user_email);
$user_name = $user->user_login;
$headers = array("Content-Type: text/html; charset=UTF-8");
wp_mail($user_email, $user_name . " unused account deleted",'Your unused account <strong>' . $user_name . '</strong> has been deleted.',$headers); // send an email notification
wp_delete_user($user->ID); // delete the user
}
}
}
$days=50; // you can even send a notification several days before for their consideration
$meta_value1 = time() - ($days * 24 * 60 * 60);
$meta_value2 = time() - (($days+1) * 24 * 60 * 60);
$user_query = new WP_User_Query(
array(
'meta_key' => 'wp-last-login',
'meta_value' => array($meta_value2,$meta_value1),
'meta_compare' => 'BETWEEN',
'meta_type' => 'NUMERIC'
)
);
$users = $user_query->results;
if (!empty($users)){
foreach( $users as $user ) {
if ($user->roles[0] =="subscriber"){
$user_email = stripslashes($user->user_email);
$user_name = $user->user_login;
$headers = array("Content-Type: text/html; charset=UTF-8");
wp_mail($user_email, "Important! ". $user_name . " account is scheduled to be deleted",'More then ' . $days . ' have passed since your last login with <strong>' . $user_name . '</strong> username. If you dont login in several days your account will be deleted',$headers); // send notification email
}
}
}
}
I`m using this with success on my site, but for security you should test it out first on a nonproduction site first.
On a side note, this won`t list/delete those users to have never logged in or only before first plugin activation. For them you have to do the job manually.
