fvm.php

<?php
/**
 * Plugin Name: Fast Velocity Minify
 * Plugin URI: https://www.upwork.com/fl/raulpeixoto
 * Description: Improve your speed score on GTmetrix, Pingdom Tools and Google PageSpeed Insights by merging and minifying CSS and JavaScript files into groups, compressing HTML and other speed optimizations. 
 * Version: 3.4.1
 * Author: Raul Peixoto
 * Author URI: https://www.upwork.com/fl/raulpeixoto
 * Text Domain: fast-velocity-minify
 * Requires at least: 5.6
 * Requires PHP: 7.3
 * License: GPL2 / https://wordpress.org/about/license/
*/


# Exit if accessed directly				
if (!defined('ABSPATH')){ exit(); }	

# Invalidate OPCache for current file on WP 5.5+
if(function_exists('wp_opcache_invalidate') && stripos(__FILE__, '/fvm.php') !== false) {
	wp_opcache_invalidate(__FILE__, true);
}

# info, variables, paths
if (!defined('FVM_PDIR')) { define('FVM_PDIR', __DIR__ . '/'); }  # /home/path/plugins/pluginname/
$fvm_var_dir_path = FVM_PDIR;                               		# /home/path/plugins/pluginname/
$fvm_var_file = FVM_PDIR . 'fvm.php';                       		# /home/path/plugins/pluginname/wpr.php
$fvm_var_inc_dir = FVM_PDIR . 'inc' . DIRECTORY_SEPARATOR;  		# /home/path/plugins/pluginname/inc/
$fvm_var_inc_lib = FVM_PDIR . 'libs' . DIRECTORY_SEPARATOR; 		# /home/path/plugins/pluginname/libs/
$fvm_var_basename = plugin_basename($fvm_var_file);                 # pluginname/wpr.php
$fvm_var_url_path = plugins_url(dirname($fvm_var_basename)) . '/';  # https://example.com/wp-content/plugins/pluginname/
$fvm_var_plugin_version = get_file_data($fvm_var_file, array('Version' => 'Version'), false)['Version'];

# global functions for backend, frontend, ajax, etc
require_once($fvm_var_inc_dir . 'common.php');
require_once($fvm_var_inc_dir . 'updates.php');

# wp-cli support
if (defined('WP_CLI') && WP_CLI) {
	require_once($fvm_var_inc_dir . 'wp-cli.php');
}

# get all options from database
$fvm_settings = fvm_get_settings();

# site url, domain name
$fvm_urls = array('wp_site_url'=>trailingslashit(site_url()), 'wp_domain'=>fvm_get_domain());


# only on backend
if(is_admin()) {
	
	# admin functionality
	require_once($fvm_var_inc_dir . 'admin.php');
	require_once($fvm_var_inc_dir . 'serverinfo.php');

	# both backend and frontend, as long as user can manage options
	add_action('admin_bar_menu', 'fvm_admintoolbar', 100);
	add_action('init', 'fvm_process_cache_purge_request');
		
	# do admin stuff, as long as user can manage options
	add_action('admin_init', 'fvm_save_settings');
	add_action('admin_init', 'fvm_check_minimum_requirements');
	add_action('admin_init', 'fvm_check_misconfiguration');
	add_action('admin_init', 'fvm_update_changes');
	add_action('admin_enqueue_scripts', 'fvm_add_admin_jscss');
	add_action('admin_menu', 'fvm_add_admin_menu');
	add_action('admin_notices', 'fvm_show_admin_notice_from_transient');
	add_action('wp_ajax_fvm_get_logs', 'fvm_get_logs_callback');
		
	# purge everything
	add_action('switch_theme', 'fvm_purge_all');
	add_action('customize_save', 'fvm_purge_all');
	add_action('avada_clear_dynamic_css_cache', 'fvm_purge_all');
	add_action('upgrader_process_complete', 'fvm_purge_all');
	add_action('update_option_theme_mods_' . get_option('stylesheet'), 'fvm_purge_all');
	
}



# frontend only, any user permissions
if(!is_admin()) {
	
	# frontend functionality
	require_once($fvm_var_inc_dir . 'frontend.php');
	
	# both back and front, as long as the option is enabled
	add_action('init', 'fvm_disable_emojis');
	
	# both backend and frontend, as long as user can manage options
	add_action('admin_bar_menu', 'fvm_admintoolbar', 100);
	add_action('init', 'fvm_process_cache_purge_request');
	
	# load after all plugins
	add_action( 'plugins_loaded', 'fvm_loader' );
	function fvm_loader() {
		$active_plugins = apply_filters('active_plugins', get_option('active_plugins'));
		if (in_array('wp-super-cache/wp-cache.php', $active_plugins)) {
			add_filter( 'wpsupercache_buffer', 'fvm_process_page' );          # WP-Super-Cache
		} else if (in_array('w3-total-cache/w3-total-cache.php', $active_plugins)) {
			add_filter( 'w3tc_process_content', 'fvm_process_page' );         # W3 Total Cache
		} else if (in_array('wp-rocket/wp-rocket.php', $active_plugins)) {
			add_filter( 'rocket_buffer', 'fvm_process_page' );                # WP Rocket
		} else if (in_array('litespeed-cache/litespeed-cache.php', $active_plugins)) {
			add_filter( 'litespeed_buffer_before', 'fvm_process_page' );      # LiteSpeed Cache
		} else if (in_array('cache-enabler/cache-enabler.php', $active_plugins)) {
			add_filter( 'cache_enabler_page_contents_before_store', 'fvm_process_page' );   # Cache Enabler
		} else {
			if (!defined('FVM_HOOK_INTO')) { define('FVM_HOOK_INTO', 'setup_theme'); }
			add_action(constant("FVM_HOOK_INTO"), 'fvm_start_buffer', 999999);
		}
	}
		
}