puffoflogic

    define('ISEMAIL_STRING_AT'  , '@');
    define('ISEMAIL_STRING_BACKSLASH' , '\\');
    define('ISEMAIL_STRING_DOT'  , '.');
    define('ISEMAIL_STRING_DQUOTE'  , '"');
    define('ISEMAIL_STRING_OPENPARENTHESIS' , '(');
    define('ISEMAIL_STRING_CLOSEPARENTHESIS', ')');