function isDisposableEmail(string $email): bool
$domain = substr(strrchr($email, "@"), 1); $freeProviders = [ 'gmail.com', 'yahoo.com', 'outlook.com', 'hotmail.com', 'aol.com', 'protonmail.com', 'mail.com', 'gmx.com' ]; return in_array($domain, $freeProviders); email checker php
function isSyntaxValid(string $email): bool $freeProviders = [ 'gmail.com'
return $this->errors;
checkdnsrr() caches results. Use dns_get_record() if you need raw, uncached data. "251") === 0) return true
foreach ($mxhosts as $mx) strpos($code, "251") === 0) return true; // 550 = user unknown, don't try other MX if (strpos($code, "550") === 0) return false;