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<?php
namespace Elementor\Core\Utils;
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly.
}
/**
* Core A/B Testing utility class
*
* Provides A/B testing functionality for Core features.
* Uses WordPress transients for caching and user-specific variation assignment.
*/
class Ab_Test {
const PREFIX_CACHE_KEY = '_elementor_ab_test_';
const CACHE_TTL = 90 * DAY_IN_SECONDS;
/**
* Get variation for a specific test
*
* @param string $test_name The name of the A/B test
* @param int $user_id Optional user ID, defaults to current user
* @return int Returns 1 or 2 for variation assignment
*/
public static function get_variation( $test_name, $user_id = null ): int {
if ( null === $user_id ) {
$user_id = get_current_user_id();
}
$variation_id = self::get_variation_id_from_cache( $test_name, $user_id );
if ( false === $variation_id ) {
$variation_id = self::get_random_variation();
self::set_variation_id_from_cache( $test_name, $user_id, $variation_id );
}
return absint( $variation_id );
}
/**
* Check if user should see the feature (50% probability)
*
* @param string $test_name The name of the A/B test
* @param int $user_id Optional user ID, defaults to current user
* @return bool True if user should see the feature
*/
public static function should_show_feature( $test_name, $user_id = null ): bool {
$variation = self::get_variation( $test_name, $user_id );
return 1 === $variation; // Only variation 1 sees the feature
}
/**
* Get variation ID from cache
*
* @param string $test_name The name of the A/B test
* @param int $user_id User ID
* @return int|false Variation ID or false if not cached
*/
private static function get_variation_id_from_cache( $test_name, $user_id ) {
$cache_key = self::PREFIX_CACHE_KEY . $test_name . '_' . $user_id;
return get_transient( $cache_key );
}
/**
* Set variation ID in cache
*
* @param string $test_name The name of the A/B test
* @param int $user_id User ID
* @param int $variation_id Variation ID to cache
*/
private static function set_variation_id_from_cache( $test_name, $user_id, $variation_id ): void {
$cache_key = self::PREFIX_CACHE_KEY . $test_name . '_' . $user_id;
set_transient( $cache_key, $variation_id, self::CACHE_TTL );
}
/**
* Generate random variation (1 or 2)
*
* @return int Random variation ID
*/
private static function get_random_variation(): int {
return mt_rand( 1, 2 );
}
}