returns true if the current internal SM version is at minimum a.b.c These are plain integer comparisons, as our internal version is constructed by us, as an array of 3 ints.

Called: check_sm_version(1,3,3)

• int $a: a major version number
• int $b: b minor version number
• int $c: c release number

Detect whether or not we have a SSL secured (HTTPS) connection to the browser

It is thought to be so if you have 'SSLOptions +StdEnvVars' in your Apache configuration, OR if you have HTTPS set to a non-empty value (except "off") in your HTTP_SERVER_VARS, OR if you have HTTP_X_FORWARDED_PROTO=https in your HTTP_SERVER_VARS, OR if you are on port 443.

Note: HTTP_X_FORWARDED_PROTO could be sent from the client and therefore possibly spoofed/hackable - for now, the administrator can tell SM to ignore this value by setting $sq_ignore_http_x_forwarded_headers to boolean TRUE in config/config_local.php, but in the future we may want to default this to TRUE and make administrators who use proxy systems turn it off (see 1.5.2+).

Note: It is possible to run SSL on a port other than 443, and if that is the case, the administrator should set $sq_https_port to the applicable port number in config/config_local.php

• return: TRUE if the current connection is SSL-encrypted; FALSE otherwise.
• since: 1.4.17 and 1.5.2

Deletes an existing session, more advanced than the standard PHP session_destroy(), it explicitly deletes the cookies and global vars.

Checks to see if a variable has already been registered in the session.

• return: whether the var has been registered

• string $name: the name of the var to check

Function to start the session and store the cookie with the session_id as

HttpOnly cookie which means that the cookie isn't accessible by javascript (IE6 only) Note that as sqsession_is_active() no longer discriminates as to when it calls this function, session_start() has to have E_NOTICE suppression (thus the @ sign). Update: with PHP7.2+, session_set_cookie_params() is similarly affected.

• since: 1.4.16

Set a cookie

• since: 1.4.16 and 1.5.1

• string $sName: The name of the cookie.
• string $sValue: The value of the cookie.
• int $iExpire: The time the cookie expires. This is a Unix timestamp so is in number of seconds since the epoch.
• string $sPath: The path on the server in which the cookie will be available on.
• string $sDomain: The domain that the cookie is available.
• boolean $bSecure: Indicates that the cookie should only be transmitted over a secure HTTPS connection.
• boolean $bHttpOnly: Disallow JS to access the cookie (IE6/FF2)
• boolean $bReplace: Replace previous cookies with same name?

Squelch error output to screen (only) for the given function.

This provides an alternative to the @ error-suppression operator where errors will not be shown in the interface but will show up in the server log file (assuming the administrator has configured PHP logging).

• return: The return value, if any, of the function being executed will be returned.
• since: 1.4.12 and 1.5.2

• string $function: The function to be executed
• array $args: The arguments to be passed to the function (OPTIONAL; default no arguments) NOTE: The caller must take extra action if the function being called is supposed to use any of the parameters by reference. In the following example, $x is passed by reference and $y is passed by value to the "my_func" function. sq_call_function_suppress_errors('my_func', array(&$x, $y));