<?php
function checkEmail($email)
{
$pregEmail = "/([a-z0-9]*[-_\.]?[a-z0-9]+)*@([a-z0-9]*[-_]?[a-z0-9]+)+[\.][a-z]{2,3}([\.][a-z]{2})?/i";
return preg_match($pregEmail, $email);
}
var_dump(checkEmail("user@bfw.wiki"));
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