AB.php
Code (php)
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<?php
if(!isset($_SESSION)) {
session_start();
}
/**
* Singleton AB class
*/
final class AB
{
private $abSelectFunction = "abSelectDefault";
/**
* Call this method to get singleton
*
* @return UserFactory
*/
public static function Instance()
{
static $inst = null; // PHP needs this to be set here.
if ($inst === null) {
$inst = new AB();
}
return $inst;
}
/**
* getAb returns the A/B test name.
* The test selection is determined by the abSelect function.
* You can provide your own abTest function by creating a globally accessible
* function and pass the name of that function to the setAbSelectFunction.
* @return the A/B test name.
*/
public function getAb() {
$ab = "default";
if(strlen($this->abSelectFunction) > 0) {
$ini_array = parse_ini_file(dirname(__FILE__) . "/AB.ini", true);
$func = $this->abSelectFunction;
$ab = $func($ini_array["Sites"]);
}
return $ab;
}
/**
* setAbSelectFunction can be used to set your own
* A/B test selection function.
* @param $functionName name of your function which does the selecting.
*/
public function setAbSelectFunction($functionName) {
$this->abSelectFunction = $functionName;
}
/**
* getAbSelectFunction returns the name of the A/B test selection function.
* @return name of the A/B test selection function.
*/
public function getAbSelectFunction() {
return $this->abSelectFunction;
}
/**
* Private constructor
*/
private function __construct()
{
// Use Instance()
}
/**
* Private clone
*/
private function __clone()
{
// Me not like clones! Me smash clones!
}
}
/**
* abSelectDefault generates a random outcome with the given input.
* The input is an array.
* The output is an element from that array.
* The test is stored in as a session variable and is reused during the session lifetime.
*/
function abSelectDefault($array) {
$ab = $array[mt_rand(0, (sizeof($array)-1))];
// Check if AB cookie has been set. If set then it overrides the session value.
// otherwise we use the session value if that has been set.
if(isset($_COOKIE["ab"]) && strlen($_COOKIE["ab"]) > 0) {
$_SESSION["ab"] = $_COOKIE["ab"];
$ab = $_SESSION["ab"];
}
else if(isset($_SESSION["ab"]) && strlen($_SESSION["ab"]) > 0) {
$ab = $_SESSION["ab"];
}
// Check for manual A/B test passed by URI. Don't allow path traversal characters.
if(isset($_REQUEST["ab"]) && strlen($_REQUEST["ab"]) > 0 && preg_match("/(\.|\/)/", $_REQUEST["ab"]) == false) {
$ab = $_REQUEST["ab"];
}
$_SESSION["ab"] = $ab;
setcookie("ab", $_SESSION["ab"], time()+(10 * 365 * 24 * 3600));
return $ab;
}
?>
if(!isset($_SESSION)) {
session_start();
}
/**
* Singleton AB class
*/
final class AB
{
private $abSelectFunction = "abSelectDefault";
/**
* Call this method to get singleton
*
* @return UserFactory
*/
public static function Instance()
{
static $inst = null; // PHP needs this to be set here.
if ($inst === null) {
$inst = new AB();
}
return $inst;
}
/**
* getAb returns the A/B test name.
* The test selection is determined by the abSelect function.
* You can provide your own abTest function by creating a globally accessible
* function and pass the name of that function to the setAbSelectFunction.
* @return the A/B test name.
*/
public function getAb() {
$ab = "default";
if(strlen($this->abSelectFunction) > 0) {
$ini_array = parse_ini_file(dirname(__FILE__) . "/AB.ini", true);
$func = $this->abSelectFunction;
$ab = $func($ini_array["Sites"]);
}
return $ab;
}
/**
* setAbSelectFunction can be used to set your own
* A/B test selection function.
* @param $functionName name of your function which does the selecting.
*/
public function setAbSelectFunction($functionName) {
$this->abSelectFunction = $functionName;
}
/**
* getAbSelectFunction returns the name of the A/B test selection function.
* @return name of the A/B test selection function.
*/
public function getAbSelectFunction() {
return $this->abSelectFunction;
}
/**
* Private constructor
*/
private function __construct()
{
// Use Instance()
}
/**
* Private clone
*/
private function __clone()
{
// Me not like clones! Me smash clones!
}
}
/**
* abSelectDefault generates a random outcome with the given input.
* The input is an array.
* The output is an element from that array.
* The test is stored in as a session variable and is reused during the session lifetime.
*/
function abSelectDefault($array) {
$ab = $array[mt_rand(0, (sizeof($array)-1))];
// Check if AB cookie has been set. If set then it overrides the session value.
// otherwise we use the session value if that has been set.
if(isset($_COOKIE["ab"]) && strlen($_COOKIE["ab"]) > 0) {
$_SESSION["ab"] = $_COOKIE["ab"];
$ab = $_SESSION["ab"];
}
else if(isset($_SESSION["ab"]) && strlen($_SESSION["ab"]) > 0) {
$ab = $_SESSION["ab"];
}
// Check for manual A/B test passed by URI. Don't allow path traversal characters.
if(isset($_REQUEST["ab"]) && strlen($_REQUEST["ab"]) > 0 && preg_match("/(\.|\/)/", $_REQUEST["ab"]) == false) {
$ab = $_REQUEST["ab"];
}
$_SESSION["ab"] = $ab;
setcookie("ab", $_SESSION["ab"], time()+(10 * 365 * 24 * 3600));
return $ab;
}
?>