{

$input = strip_tags(trim($input));

if (empty($input) & !is_numeric($input))

{ // in the event the input can't be sanitized

return NULL;

}

return $input;

{

$out = '';

for ($i = 0; $i < $length; $i++)

{

$rand_index = random_int(0, strlen($keyspace) -1);

$out .= $keyspace[$rand_index];

}

return $out;

{

$out = '';

for ($i = 0; $i < $length; $i++)

{

$rand_index = random_int(0, strlen($keyspace) -1);

$out .= $keyspace[$rand_index];

}

return $out;

{ // https://github.com/FinGu/c_auth/blob/cfbd7036e69561e538e26dc47f7690dbc0d8ba53/functions/general/functions.php#L55

$out = '';

for ($i = 0; $i < $length; $i++)

{

$rand_index = random_int(0, strlen($keyspace) - 1);

$out .= $keyspace[$rand_index];

}

return $out;

{ // https://stackoverflow.com/a/2510459

$units = array(

'B',

'KB',

'MB',

'GB',

'TB'

);

$bytes = max($bytes, 0);

$pow = floor(($bytes ? log($bytes) : 0) / log(1024));

$pow = min($pow, count($units) - 1);

$bytes /= (1 << (10 * $pow));

return round($bytes, $precision) . ' ' . $units[$pow];

{ // https://stackoverflow.com/a/4356295

$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

$charactersLength = strlen($characters);

$randomString = '';

for ($i = 0; $i < $length; $i++)

{

$randomString .= $characters[rand(0, $charactersLength - 1)];

}

return $randomString;

{ // adapted from https://stackoverflow.com/a/4356295

$characters = '0123456789';

$charactersLength = strlen($characters);

$randomString = '';

for ($i = 0; $i < $length; $i++)

{

$randomString .= $characters[rand(0, $charactersLength - 1)];

}

return $randomString;

{ // from https://github.com/Mikjaer/haveibeenpwned/blob/main/p0wned.php

$hash = strtoupper(sha1($pw));

foreach (explode("\n", file_get_contents("https://api.pwnedpasswords.com/range/" . substr($hash, 0, 5))) as $pmatch)

if (substr($hash, 0, 5) . substr($pmatch, 0, strpos($pmatch, ":")) == $hash)

return true;

{

if(!filter_var($email, FILTER_VALIDATE_EMAIL))

{

return true;

}

$resp = file_get_contents("https://api.mailcheck.ai/email/" . $email);

$json = json_decode($resp);

if($json->disposable)

{

return true;

}

if (strpos($email, ".ru") !== false)

{

return false;

// russian email services either have a lot of downtime or heavy rate limits, because every other time I make SMTP connection with an .ru email it fails

}

if (strpos($email, "proton") !== false)

{

return false;

// protonmail is also giving us issues

}

ini_set("default_socket_timeout", 1);

$connection = @fsockopen("gmail-smtp-in.l.google.com", 25);

// check if port 25 is open (many hosts have it closed inherently)

if (is_resource($connection))

{

global $mail;

require_once (($_SERVER['DOCUMENT_ROOT'] == "/usr/share/nginx/html/panel" || $_SERVER['DOCUMENT_ROOT'] == "/usr/share/nginx/html/api") ? "/usr/share/nginx/html" : $_SERVER['DOCUMENT_ROOT']) . '/includes/VerifyEmail.class.php';

return (!$mail->check($email));

}

else

{

return false;

}

$value = "";

$unit = "";

if ($expires >= 31536000) {

$value = floor($expires / 31536000);

$unit = 'Year(s)';

}

elseif ($expires >= 2419200) {

$value = floor($expires / 2592000);

$unit = 'Month(s)';

}

elseif ($expires >= 604800) {

$value = floor($expires / 604800);

$unit = 'Weeks(s)';

}

elseif ($expires >= 86400) {

$value = floor($expires / 86400);

$unit = 'Day(s)';

} elseif ($expires >= 3600) {

$value = floor($expires / 3600);

$unit = 'Hour(s)';

} elseif ($expires >= 60) {

$value = floor($expires / 60);

$unit = 'Minute(s)';

} else {

$value = $expires;

$unit = 'Second(s)';

}

return "$value $unit";

}