lw-mwp-tools.php

<?php
/*
Plugin Name: LW MWP Tools
Plugin URI: https://github.com/fs1995/lw-mwp-tools/
Description: Easy access to system logs and resource usage on the Liquid Web Managed WordPress Hosting Platform.
Author: Francis Smith
Version: 0.3.6.1
Author URI: https://github.com/fs1995
License: GPL2
*/

defined('ABSPATH') or die('No!');

//check if we are on MWPv2 platform. this is not a thorough check, just seeing if the user php is running as begins with 's' then a number.
if(PHP_OS !== "Linux" || !preg_match('/^s[0-9]+/', get_current_user()) ){ //then not on MWPv2,
  if(get_current_user() !== 'root'){ //but exclude deactivating if run as root.
    delete_option('lwmwptools_update_interval'); //cleanup db entry,
    exit("LW MWP Tools requires the Liquid Web Managed WordPress V2 platform. This plugin does not support the V3 or Managed WooCommerce platforms, as resource usage is irrelevant (load is distributed across multiple servers) and error/access logs are not accessible by the PHP user. You could also be receiving this error if you have migrated your site off the platform, in that case you can use this plugin instead: <a href=\"https://wordpress.org/plugins/servermonitor/\" target=\"_blank\">ServerMonitor</a> "); //and prevent plugin from activating nicely.
  }
}

function lwmwptools_readlog($file){
  if(file_exists($file)){
    if(filesize($file) > '0'){
      if(is_readable($file)){
        return "Reading file: ".$file."<hr>".file_get_contents($file);
      }else{
        return "Error: The file ".$file." is not readable. Please report this <a href=\"https://wordpress.org/support/plugin/lw-mwp-tools\" target=\"_blank\">here</a>.";
      }
    }else{
      return "The file ".$file." is empty.";
    }
  }else{
    return "Error: The file ".$file." does not exist. Please report this <a href=\"https://wordpress.org/support/plugin/lw-mwp-tools\" target=\"_blank\">here</a>.";
  }
}

add_action('admin_menu', 'lw_mwp_tools_menu'); //hook into WP menu
add_action('wp_ajax_lwmwptools_monitorajax', 'lwmwptools_monitorajax'); //ajax request handler

function lw_mwp_tools_menu(){ //create the plugins menu
  add_menu_page('LW MWP Tools', 'LW MWP Tools', 'manage_options', 'lw-mwp-tools',  'lw_mwp_tools_monitor', 'data:image/svg+xml;base64,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');
  add_submenu_page ('lw-mwp-tools', 'Server Resource Monitor', 'Resource Monitor', 'manage_options', 'lw-mwp-tools', 'lw_mwp_tools_monitor');
  add_submenu_page ('lw-mwp-tools', 'System Information', 'System Info', 'manage_options', 'lw-mwp-tools-info', 'lw_mwp_tools_info');
  add_submenu_page ('lw-mwp-tools', 'Clear cache', 'Clear cache', 'manage_options', 'lw-mwp-tools-cache', 'lw_mwp_tools_cache');
  add_submenu_page ('lw-mwp-tools', 'PHP error log', 'PHP error log', 'manage_options', 'lw-mwp-tools-php', 'lw_mwp_tools_php');
  add_submenu_page ('lw-mwp-tools', 'NGINX access log', 'NGINX access log', 'manage_options', 'lw-mwp-tools-nginx-access', 'lw_mwp_tools_nginx_access');
  add_submenu_page ('lw-mwp-tools', 'NGINX error log', 'NGINX error log', 'manage_options', 'lw-mwp-tools-nginx-error', 'lw_mwp_tools_nginx_error');

  add_action('admin_init', 'register_lwmwptools_settings');
}

function lw_mwp_tools_monitor(){ //generate the resource monitor page
  require 'monitor.php'; //in a separate file cause theres a bit to this page.
  wp_enqueue_style('lwmwptools-chartistcss', plugins_url('css/chartist.min.css', __FILE__) );
  wp_enqueue_style('lwmwtptools-monitorcss', plugins_url('css/monitor.css', __FILE__), array('lwmwptools-chartistcss') );
  wp_enqueue_script('lwmwptools-chartistjs', plugins_url('js/chartist.min.js', __FILE__) );
  wp_enqueue_script('lwmwptools-smoothiejs', plugins_url('js/smoothie.min.js', __FILE__) );
  wp_enqueue_script('lwmwptools-monitorjs', plugins_url('js/monitor.js', __FILE__), array('lwmwptools-chartistjs', 'jquery') );
}

function lw_mwp_tools_info(){ //generate the resource monitor page
  if(isset($_POST['servermonitor-phpinfo'])){
    echo phpinfo();
    exit;
  }
  $lwmwptools_uptime = floatval(file_get_contents('/proc/uptime')); //read uptime
  $lwmwptools_uptime_secs = round(fmod($lwmwptools_uptime, 60), 0); $lwmwptools_uptime = (int)($lwmwptools_uptime / 60);
  $lwmwptools_uptime_mins = $lwmwptools_uptime % 60; $lwmwptools_uptime = (int)($lwmwptools_uptime / 60);
  $lwmwptools_uptime_hr = $lwmwptools_uptime % 24; $lwmwptools_uptime = (int)($lwmwptools_uptime / 24);
  $lwmwptools_uptime_days = $lwmwptools_uptime;

  echo "<div class=\"wrap\"><h1>System Information</h1>Hostname: ", gethostname(), "<br>Uptime: ", $lwmwptools_uptime_days, " days, ", $lwmwptools_uptime_hr, " hours, ", $lwmwptools_uptime_mins, " minutes, ", $lwmwptools_uptime_secs, " seconds.<br>Server IP: ", $_SERVER['SERVER_ADDR'], "<br>PHP version: ", phpversion(), "<br>Platform: ", PHP_OS, "<br><br></div><form method=\"post\" action=\"\"><input type=\"submit\" name=\"servermonitor-phpinfo\" value=\"View phpinfo()\" /></form>";
}

function lw_mwp_tools_cache(){
  echo "<div class=\"wrap\"><h1>Clear cache</h1>If changes are not showing up, you may need to clear cache.<br><br><form method=\"post\" action=\"\">";

  if(isset($_POST['lwmwptools-static'])){ //delete static cache button was clicked
    function lwmwptools_filecache($dir){
      if(is_dir($dir)){ //if we are given a directory...
        $objects = scandir($dir); //list all files/dirs within it...
        foreach ($objects as $object){
          if ($object != "." && $object != "..") {
            if(is_dir($dir."/".$object)){ //if we come across a directory within it...
              lwmwptools_filecache($dir."/".$object); //will need to remove all files within that dir.
            }else{
              unlink($dir."/".$object); //else, delete the individual files.
              echo "Deleted file: ". $dir."/".$object."<br>";
            }
          }
        }
        rmdir($dir); //we are done with the foreach object loop and have an empty directory, delete it.
        echo "Removed directory: ".$dir."<br>";
      }
    }

    lwmwptools_filecache(WP_CONTENT_DIR."/cache");
    echo "Done clearing file cache!<br>";
  }

  if(isset($_POST['lwmwptools-opcache'])){ //flush opcache button was clicked
    wp_cache_flush();
    if(opcache_reset()){ //reqs php 5.5+
      echo "OpCache cleared!<br>";
    }else{
      echo "Error: opcode cache seems to be disabled.<br>";
    }
  }

  echo "<br><input type=\"submit\" name=\"lwmwptools-static\" value=\"Delete static file cache\" /> Delete contents of wp-content/cache/<br><br>";
  echo "<input type=\"submit\" name=\"lwmwptools-opcache\" value=\"Clear opcode cache\" /> Flush PHP OpCache<br><br></form></div>";
  echo "Your browser could be caching too: <a href=\"https://www.liquidweb.com/kb/clearing-your-browser-cache/\" target=\"_blank\">how to clear browser cache</a>";
}

function lw_mwp_tools_php(){ //generate the php error log page
  echo "<div class=\"wrap\"><h1>PHP Error Log viewer</h1>This page does not automatically update, you will need to refresh it. If you are troubleshooting WordPress code, have you turned on <a href=\"https://codex.wordpress.org/Debugging_in_WordPress\" target=\"_blank\">WP_DEBUG</a> in wp-config.php?</div><pre>". lwmwptools_readlog(ini_get('error_log')) ."</pre>";
} //passing the lwmwptools_readlog function the php error log location, which will return the contents of the log for this function to display

function lw_mwp_tools_nginx_access(){ //generate the nginx access log page
  echo "<div class=\"wrap\"><h1>NGINX access Log viewer</h1>This page does not automatically update, you will need to refresh it.</div><pre>" . lwmwptools_readlog('/var/log/nginx/'.get_current_user().'.access.log') . "</pre>";
}

function lw_mwp_tools_nginx_error(){ //generate the nginx error log page
  echo "<div class=\"wrap\"><h1>NGINX Error Log viewer</h1>This page does not automatically update, you will need to refresh it.</dev><pre>" . lwmwptools_readlog('/var/log/nginx/'.get_current_user().'.error.log') . "</pre>";
}

function register_lwmwptools_settings(){ //register the plugins settings
  register_setting('lwmwptools-settings-group', 'lwmwptools_update_interval', 'absint');
}

function lwmwptools_monitorajax(){
  require 'api.php';
  wp_die(); //terminate immediately and return response
}