apache - PHP Fatal error: Class 'Swift_Validate' not found -

apache - PHP Fatal error: Class 'Swift_Validate' not found -

i trying utilize swift_validate::email($email) , php error: php fatal error: class 'swift_validate' not found.

i have latest version of swiftmailer. there preference settings need do?

i have tried including validate.php file, error: php fatal error: class 'swift_dependencycontainer' not found.

i include dependencycontainer.php , error php fatal error: class 'swift_dependencyexception' not found.

i include dependencyexception.php , error: class 'swift_swiftexception' not found.

i include swiftexception.php , still same error.

i think must not have preferences set correctly. calling: "require_once($dir.'/swift/swift_required.php');"

the code using validation is: if (!swift_validate::email($email)) { $error = true; }

any help appreciated. using latest apache , php.

try require_once dirname( __file__) . '/lib/swift_required.php'; utilize built-in autoloader, lib subfolder of folder current file ( default directory construction of library )

php apache swiftmailer