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<?php |
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defined('ABSPATH') || die('Restricted Access'); |
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|
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function acym_getEmailRegex(bool $secureJS = false, bool $forceRegex = false): string |
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{ |
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$config = acym_config(); |
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if ($forceRegex || $config->get('special_chars', 0) != 1) { |
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$regex = '[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+)*\@([a-z0-9-]+\.)+[a-z0-9]{2,20}'; |
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} else { |
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$regex = '.+\@(.+\.)+.{2,20}'; |
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} |
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|
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if ($secureJS) { |
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$regex = str_replace(['"', "'"], ['\"', "\'"], $regex); |
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} |
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|
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return $regex; |
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} |
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|
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function acym_isValidEmail($email, bool $extended = false): bool |
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{ |
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if (empty($email) || !is_string($email)) { |
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return false; |
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} |
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|
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if (!preg_match('/^'.acym_getEmailRegex().'$/i', $email)) { |
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return false; |
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} |
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|
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if (!$extended) { |
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return true; |
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} |
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|
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//Now we do an extended verification... |
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|
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$config = acym_config(); |
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|
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if ($config->get('email_checkdomain', false) && function_exists('getmxrr')) { |
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$domain = substr($email, strrpos($email, '@') + 1); |
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$mxhosts = []; |
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//Check if the domain exists |
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$checkDomain = getmxrr($domain, $mxhosts); |
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//Sometimes the returned host is checkyouremailaddress-hostnamedoesnotexist262392208.com ... not sure why! |
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//But we remove it if it's the case... |
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if (!empty($mxhosts) && strpos($mxhosts[0], 'hostnamedoesnotexist')) { |
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array_shift($mxhosts); |
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} |
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if (!$checkDomain || empty($mxhosts)) { |
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//Lets check with another function in case of... |
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$dns = @dns_get_record($domain, DNS_A); |
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if (empty($dns)) { |
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return false; |
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} |
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|
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$domainChanged = true; |
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foreach ($dns as $oneRes) { |
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if (strtolower($oneRes['host']) == strtolower($domain)) { |
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$domainChanged = false; |
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} |
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} |
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|
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if ($domainChanged) { |
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return false; |
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} |
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} |
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} |
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|
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$ip = acym_getIP(); |
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|
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// Check IP to limit subscription to max 3 per 2 hours |
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if (!empty($ip) && $config->get('email_iptimecheck', 0)) { |
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$lapseTime = time() - 7200; |
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$nbUsers = acym_loadResult('SELECT COUNT(*) FROM #__acym_user WHERE creation_date > '.intval($lapseTime).' AND ip = '.acym_escapeDB($ip)); |
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if ($nbUsers >= 3) { |
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return false; |
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} |
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} |
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|
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return true; |
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} |
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|
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function acym_isPunycode(string $email): bool |
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{ |
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return strpos($email, '@xn--') !== false; |
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} |
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|
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function acym_getDomain(string $email): string |
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{ |
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$aPos = strrpos($email, '@'); |
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if (empty($aPos)) { |
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return ''; |
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} |
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|
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return substr($email, $aPos + 1); |
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} |
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