$smtp = new SMTP(SMTP_HOST, SMTP_PORT, IS_TLS);
$smtp->auth(SMTP_USER, SMTP_PASS);
$smtp->mail_from(WHO_IS_THE_EMAIL_FROM);
$smtp->send(TO, SUBJECT, MESSAGE, ADDITIONAL_HEADERS);
// Of course replacing everything with the necessary stuff.
 
#
# __construct([string $smtp_host = null[, int $smtp_port = 25[, bool $is_tls = false[, int $tryfor = 5]]]]);
#   string $smtp_host - The address to the SMTP host, like mail.example.com
#   int $smtp_port - The port the SMTP server is listening on, usually 25,
#                    but not always! (So, of course, defaults to 25)
#   bool $is_tls - Whether or not to initiate a TLS connection with the server.
#                  Not always supported, but after you connect, you can check if
#                  the connection accepted it with the method is_tls().
#   int $tryfor - How many seconds that should be given to connect to the SMTP
#                 server and how long should be given for execution of an fread.
#
#
# Connects to the SMTP Server.
#
# bool connect(string $smtp_host[, int $smtp_port[, bool $is_tls = false[, int $tryfor = 5]]]);
#   For more information, look at __construct() above.
#
# returns bool - If the connection was made, TRUE is issued, otherwise FALSE.
#
#
# Retrieves the response from the SMTP server.
#
# mixed get_response();
#
# returns mixed - A String containing the response will be returned if there
#                 was one, but if none (Like your not connected) FALSE is issued.
#   
#
# Initiates a TLS connection with the SMTP Server.
#
# bool init_tls();
#
# returns bool - If TLS was accepted by the server, TRUE is returned. Otherwise FALSE.
#
#
# Sends EHLO or HELO if EHLO is not supported by the server.
#
# bool send_hello();
#
# returns bool - If it was successfully recieved by the SMTP Server, TRUE is issued. Otherwise FALSE.
#
#
# Authenticates with the SMTP server.
#
# bool auth(string $username, string $password);
#   string $username - Your SMTP username.
#   string $password - Your SMTP password.
#
# returns bool - TRUE is issued if you authenticated with the server successfully, otherwise FALSE.
#
#
# Sends the MAIL FROM header which tells the SMTP Server who the email
# is sent from.
#
# bool mail_from(string $from);
#   string $from - The email to set the from too. Ex: you@example.com
#
# returns bool - TRUE if it was accepted, FALSE if not.
#
# NOTE: Please note that you cannot do "Your name" <you@example.com> as
#       it will not be accepted. You can specify that, if you want as
#       FROM in the additional_headers array parameter in SMTP::send()
#
#
# Sends the email and any headers to the SMTP Server.
#
# bool send(mixed $to, string $subject, string $message[, string $alt_message = null[, array $additional_headers = array()]]);
#   mixed $to - This can be an array of addresses, or a string of one addresses
#               or multiple addresses separated by commas.
#   string $subject - The Subject of the email message.
#   string $message - The email message to send.
#   string $alt_message - If HTML is set, this can be set so if the recievers email client
#                         has HTML disabled or is not supported.
#   array $additional_headers - An associative array (Header => Value) containing
#                               additional headers you want set.
#
# returns bool - If the message was sent without error, TRUE is issued.
#                Otherwise false is returned.
#
# NOTE: If the message was sent successfully, the connection to the SMTP server
#       is automatically closed.
#
#
# Close the connection to the current SMTP server.
#
# bool close([bool $quit = false]);
#   bool $quit - TRUE if you want the QUIT command to be issued to close
#                the connection with the SMTP server.
#
# returns bool - If the connection was closed, TRUE is issued. Otherwise FALSE.
#
#
# Sets whether or not the message will allow HTML.
#
# bool set_html([bool $html_allowed = true]);
#   bool $html_allowed - TRUE if you want to allow HTML to be sent in the message.
#
# returns bool - TRUE if the setting was successfully changed, FALSE otherwise.
#
#
# Sets the priority of the message.
#
# bool set_priority([string $priority = 'normal']);
#   string $priority - The priority to set for the message. Acceptable values are:
#                      highest, high, normal, belownormal and low.
#
# returns bool - TRUE if the setting was successfully changed, FALSE otherwise.
#
#
# Sets your desired email charset. Such as UTF-8
#
# bool set_charset($charset);
#   string $charset - The chacter set to apply to the email.
#
# returns bool - TRUE if the setting was successfully changed, FALSE otherwise.
#
#
# Returns errors reported by this class.
#
# mixed error([$last_error = true]);
#   $last_error - TRUE if you want the last error returned. If FALSE is set, then the
#                 whole array of errors is returned.
#
# returns mixed - If $last_error is true, a string is returned, if it is false, an array
#                 will be returned. FALSE will be returned if there are no errors.
#