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Edit: /usr/src/litespeed-wp-plugin/6.0.0.1/litespeed-cache/litespeed-cache.php

<?php

/**
 * Plugin Name:       LiteSpeed Cache
 * Plugin URI:        https://www.litespeedtech.com/products/cache-plugins/wordpress-acceleration
 * Description:       High-performance page caching and site optimization from LiteSpeed
 * Version:           6.0.0.1
 * Author:            LiteSpeed Technologies
 * Author URI:        https://www.litespeedtech.com
 * License:           GPLv3
 * License URI:       http://www.gnu.org/licenses/gpl.html
 * Text Domain:       litespeed-cache
 * Domain Path:       /lang
 *
 * Copyright (C) 2015-2024 LiteSpeed Technologies, 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, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/
defined('WPINC') || exit();

if (defined('LSCWP_V')) {
	return;
}

!defined('LSCWP_V') && define('LSCWP_V', '6.0.0.1');

!defined('LSCWP_CONTENT_DIR') && define('LSCWP_CONTENT_DIR', WP_CONTENT_DIR);
!defined('LSCWP_DIR') && define('LSCWP_DIR', __DIR__ . '/'); // Full absolute path '/var/www/html/***/wp-content/plugins/litespeed-cache/' or MU
!defined('LSCWP_BASENAME') && define('LSCWP_BASENAME', 'litespeed-cache/litespeed-cache.php'); //LSCWP_BASENAME='litespeed-cache/litespeed-cache.php'

/**
 * This needs to be before activation because admin-rules.class.php need const `LSCWP_CONTENT_FOLDER`
 * This also needs to be before cfg.cls init because default cdn_included_dir needs `LSCWP_CONTENT_FOLDER`
 * @since  5.2 Auto correct protocol for CONTENT URL
 */
$WP_CONTENT_URL = WP_CONTENT_URL;
$home_url = home_url('/');
if (substr($WP_CONTENT_URL, 0, 5) == 'http:' && substr($home_url, 0, 5) == 'https') {
	$WP_CONTENT_URL = str_replace('http://', 'https://', $WP_CONTENT_URL);
}
!defined('LSCWP_CONTENT_FOLDER') && define('LSCWP_CONTENT_FOLDER', str_replace($home_url, '', $WP_CONTENT_URL)); // `wp-content`
!defined('LSWCP_PLUGIN_URL') && define('LSWCP_PLUGIN_URL', plugin_dir_url(__FILE__)); // Full URL path '//example.com/wp-content/plugins/litespeed-cache/'

/**
 * Static cache files consts
 * @since  3.0
 */
!defined('LITESPEED_STATIC_URL') && define('LITESPEED_STATIC_URL', $WP_CONTENT_URL . '/litespeed'); // Full static cache folder URL '//example.com/wp-content/litespeed'
!defined('LITESPEED_STATIC_DIR') && define('LITESPEED_STATIC_DIR', LSCWP_CONTENT_DIR . '/litespeed'); // Full static cache folder path '/var/www/html/***/wp-content/litespeed'

!defined('LITESPEED_TIME_OFFSET') && define('LITESPEED_TIME_OFFSET', get_option('gmt_offset') * 60 * 60);

// Placeholder for lazyload img
!defined('LITESPEED_PLACEHOLDER') && define('LITESPEED_PLACEHOLDER', 'data:image/gif;base64,R0lGODdhAQABAPAAAMPDwwAAACwAAAAAAQABAAACAkQBADs=');

// Auto register LiteSpeed classes
require_once LSCWP_DIR . 'autoload.php';

// Define CLI
if ((defined('WP_CLI') && WP_CLI) || PHP_SAPI == 'cli') {
	!defined('LITESPEED_CLI') && define('LITESPEED_CLI', true);

// Register CLI cmd
	if (method_exists('WP_CLI', 'add_command')) {
		WP_CLI::add_command('litespeed-option', 'LiteSpeed\CLI\Option');
		WP_CLI::add_command('litespeed-purge', 'LiteSpeed\CLI\Purge');
		WP_CLI::add_command('litespeed-online', 'LiteSpeed\CLI\Online');
		WP_CLI::add_command('litespeed-image', 'LiteSpeed\CLI\Image');
		WP_CLI::add_command('litespeed-debug', 'LiteSpeed\CLI\Debug');
		WP_CLI::add_command('litespeed-presets', 'LiteSpeed\CLI\Presets');
		WP_CLI::add_command('litespeed-crawler', 'LiteSpeed\CLI\Crawler');
	}
}

// Server type
if (!defined('LITESPEED_SERVER_TYPE')) {
	if (isset($_SERVER['HTTP_X_LSCACHE']) && $_SERVER['HTTP_X_LSCACHE']) {
		define('LITESPEED_SERVER_TYPE', 'LITESPEED_SERVER_ADC');
	} elseif (isset($_SERVER['LSWS_EDITION']) && strpos($_SERVER['LSWS_EDITION'], 'Openlitespeed') === 0) {
		define('LITESPEED_SERVER_TYPE', 'LITESPEED_SERVER_OLS');
	} elseif (isset($_SERVER['SERVER_SOFTWARE']) && $_SERVER['SERVER_SOFTWARE'] == 'LiteSpeed') {
		define('LITESPEED_SERVER_TYPE', 'LITESPEED_SERVER_ENT');
	} else {
		define('LITESPEED_SERVER_TYPE', 'NONE');
	}
}

// Checks if caching is allowed via server variable
if (!empty($_SERVER['X-LSCACHE']) || LITESPEED_SERVER_TYPE === 'LITESPEED_SERVER_ADC' || defined('LITESPEED_CLI')) {
	!defined('LITESPEED_ALLOWED') && define('LITESPEED_ALLOWED', true);
}

// ESI const defination
if (!defined('LSWCP_ESI_SUPPORT')) {
	define('LSWCP_ESI_SUPPORT', LITESPEED_SERVER_TYPE !== 'LITESPEED_SERVER_OLS' ? true : false);
}

if (!defined('LSWCP_TAG_PREFIX')) {
	define('LSWCP_TAG_PREFIX', substr(md5(LSCWP_DIR), -3));
}

/**
 * Handle exception
 */
if (!function_exists('litespeed_exception_handler')) {
	function litespeed_exception_handler($errno, $errstr, $errfile, $errline)
	{
		throw new \ErrorException($errstr, 0, $errno, $errfile, $errline);
	}
}

/**
 * Overwride the WP nonce funcs outside of LiteSpeed namespace
 * @since  3.0
 */
if (!function_exists('litespeed_define_nonce_func')) {
	function litespeed_define_nonce_func()
	{
		/**
		 * If the nonce is in none_actions filter, convert it to ESI
		 */
		function wp_create_nonce($action = -1)
		{
			if (!defined('LITESPEED_DISABLE_ALL')) {
				$control = \LiteSpeed\ESI::cls()->is_nonce_action($action);
				if ($control !== null) {
					$params = array(
						'action' => $action,
					);
					return \LiteSpeed\ESI::cls()->sub_esi_block('nonce', 'wp_create_nonce ' . $action, $params, $control, true, true, true);
				}
			}

return wp_create_nonce_litespeed_esi($action);
		}

/**
		 * Ori WP wp_create_nonce
		 */
		function wp_create_nonce_litespeed_esi($action = -1)
		{
			$uid = get_current_user_id();
			if (!$uid) {
				/** This filter is documented in wp-includes/pluggable.php */
				$uid = apply_filters('nonce_user_logged_out', $uid, $action);
			}

$token = wp_get_session_token();
			$i = wp_nonce_tick();

return substr(wp_hash($i . '|' . $action . '|' . $uid . '|' . $token, 'nonce'), -12, 10);
		}
	}
}

/**
 * Begins execution of the plugin.
 *
 * @since    1.0.0
 */
if (!function_exists('run_litespeed_cache')) {
	function run_litespeed_cache()
	{
		//Check minimum PHP requirements, which is 5.3 at the moment.
		if (version_compare(PHP_VERSION, '5.3.0', '<')) {
			return;
		}

//Check minimum WP requirements, which is 4.0 at the moment.
		if (version_compare($GLOBALS['wp_version'], '4.0', '<')) {
			return;
		}

\LiteSpeed\Core::cls();
	}

run_litespeed_cache();
}

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