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PHP 8.1.34
Preview: class-facebookparambuilder.php Size: 7.02 KB
/home2/astrociv/public_html/miyakamalkhan.com/wp-content/plugins/official-facebook-pixel/core/class-facebookparambuilder.php
<?php
/**
 * Facebook Pixel Plugin FacebookParamBuilder class.
 *
 * This file contains the ParamBuilder integration logic for
 * the CAPI Parameter Builder SDK.
 *
 * @package FacebookPixelPlugin
 */

/*
* Copyright (C) 2017-present, Meta, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*/

namespace FacebookPixelPlugin\Core;

defined( 'ABSPATH' ) || die( 'Direct access not allowed' );

/**
 * Class FacebookParamBuilder
 *
 * Manages the CAPI Parameter Builder SDK integration.
 * Provides server-side cookie management and client-side JS enqueue
 * to improve _fbc and _fbp coverage for Conversions API events.
 */
class FacebookParamBuilder {

    /**
     * Shared ParamBuilder instance.
     *
     * @var \FacebookAds\ParamBuilder|null
     */
    private static $instance = null;

    /**
     * Whether the server-side setup has been completed.
     *
     * @var bool
     */
    private static $server_setup_done = false;

    /**
     * Resolved _fbc value for this request. False means not yet resolved.
     *
     * @var string|null|false
     */
    private static $resolved_fbc = false;

    /**
     * Resolved _fbp value for this request. False means not yet resolved.
     *
     * @var string|null|false
     */
    private static $resolved_fbp = false;

    /**
     * Gets or creates the ParamBuilder singleton instance.
     *
     * Initializes the ParamBuilder with the site URL and processes
     * the current request to extract _fbc/_fbp parameters.
     *
     * @return \FacebookAds\ParamBuilder|null The ParamBuilder instance,
     *                                        or null on error.
     */
    public static function get_instance() {
        if ( null === self::$instance ) {
            try {
                $site_url       = get_site_url();
                self::$instance = new \FacebookAds\ParamBuilder(
                    array( $site_url )
                );
                self::$instance->processRequest(
                    $site_url,
                    $_GET, // phpcs:ignore WordPress.Security.NonceVerification
                    $_COOKIE,
                    isset( $_SERVER['HTTP_REFERER'] )
                        ? sanitize_text_field(
                            wp_unslash( $_SERVER['HTTP_REFERER'] )
                        )
                        : null
                );
            } catch ( \Throwable $exception ) {
                FacebookPluginUtils::log_once_daily(
                    'init',
                    'Meta Pixel: Error initializing CAPI Parameter Builder: '
                    . $exception->getMessage()
                );
                self::$instance = null;
            }
        }

        return self::$instance;
    }

    /**
     * Server-side setup: sets cookies from ParamBuilder.
     *
     * Must be called early in the request lifecycle before
     * headers are sent.
     */
    public static function server_setup() {
        if ( self::$server_setup_done ) {
            return;
        }
        self::$server_setup_done = true;

        try {
            $param_builder = self::get_instance();
            if ( null === $param_builder ) {
                return;
            }

            $cookies_to_set = $param_builder->getCookiesToSet();

            if ( FacebookSignalState::is_held() ) {
                $fbc = self::get_fbc();
                $fbp = self::get_fbp();

                if ( ! empty( $fbc ) ) {
                    FacebookSignalState::set_attribution_data( 'fbc', $fbc );
                }
                if ( ! empty( $fbp ) ) {
                    FacebookSignalState::set_attribution_data( 'fbp', $fbp );
                }

                foreach ( $cookies_to_set as $cookie ) {
                    if ( '_fbp' === $cookie->name ) {
                        FacebookSignalState::set_attribution_data( 'fbp_domain', $cookie->domain );
                    } elseif ( '_fbc' === $cookie->name ) {
                        FacebookSignalState::set_attribution_data( 'fbc_domain', $cookie->domain );
                    }
                }

                return;
            }

            if ( ! headers_sent() ) {
                foreach ( $cookies_to_set as $cookie ) {
                    setcookie(
                        $cookie->name,
                        $cookie->value,
                        array(
                            'expires'  => time() + $cookie->max_age,
                            'path'     => '/',
                            'domain'   => $cookie->domain,
                            'secure'   => is_ssl(),
                            'httponly' => false,
                            'samesite' => 'Lax',
                        )
                    );
                }
            }
        } catch ( \Throwable $exception ) {
            FacebookPluginUtils::log_once_daily(
                'setup',
                'Meta Pixel: Error setting ParamBuilder cookies: '
                . $exception->getMessage()
            );
        }
    }

    /**
     * Gets the _fbc value from ParamBuilder.
     *
     * @return string|null The _fbc value, or null if unavailable.
     */
    public static function get_fbc() {
        if ( false !== self::$resolved_fbc ) {
            return self::$resolved_fbc;
        }

        self::$resolved_fbc = null;
        try {
            $param_builder = self::get_instance();
            if ( null !== $param_builder ) {
                $fbc = $param_builder->getFbc();
                if ( ! empty( $fbc ) ) {
                    self::$resolved_fbc = $fbc;
                }
            }
        } catch ( \Throwable $exception ) {
            FacebookPluginUtils::log_once_daily(
                'fbc',
                'Meta Pixel: Error getting FBC from ParamBuilder: '
                . $exception->getMessage()
            );
        }
        return self::$resolved_fbc;
    }

    /**
     * Gets the _fbp value from ParamBuilder.
     *
     * @return string|null The _fbp value, or null if unavailable.
     */
    public static function get_fbp() {
        if ( false !== self::$resolved_fbp ) {
            return self::$resolved_fbp;
        }

        self::$resolved_fbp = null;
        try {
            $param_builder = self::get_instance();
            if ( null !== $param_builder ) {
                $fbp = $param_builder->getFbp();
                if ( ! empty( $fbp ) ) {
                    self::$resolved_fbp = $fbp;
                }
            }
        } catch ( \Throwable $exception ) {
            FacebookPluginUtils::log_once_daily(
                'fbp',
                'Meta Pixel: Error getting FBP from ParamBuilder: '
                . $exception->getMessage()
            );
        }
        return self::$resolved_fbp;
    }
}

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