<?php

/***********************************************************************
 * Code Profiler (free & pro) troubleshooter script:
 *
 * 1. Rename this file to "cp-info.php".
 * 2. Over FTP, upload it into your WordPress root folder.
 * 3. Go to https://YOUR WEBSITE/cp-info.php
 * 4. That will create and download a "support.txt" file that includes
 * 	the troubleshooter results to send to the support.
 *
 **********************************************************************/

class CP_Troubleshooter {


	/**
	 * Troubleshooter info
	 */
	private $version = '1.0';


	/**
	 * Array to handle all results
	 */
	private $buffer = [];


	/**
	 * Initialize.
	 */
	public function __construct() {

		require 'wp-config.php';

		$this->buffer['version'] = $this->version;

		$this->get_system_info('sysinfo');
		$this->cp_info('code-profiler');
		$this->function_exists('functions');
		$this->check_wpdb('wpdb');
		$this->get_all_plugins('plugins');
		$this->get_theme('themes');

		$export = json_encode( $this->buffer );
		header('Content-Length: '. strlen( $export ) );
		header('Content-Disposition: attachment; filename="support.txt"');
		echo $export;
	}


	/**
	 * Retrieve system info:
	 * * PHP version
	 * * PHP SAPI
	 * * HTTP server
	 * * Opcode cache
	 * * PHP directives (time limit, memory available, temp dir etc)
	 * * PHP last error
	 */
	private function get_system_info( $key ) {

		$this->buffer[ $key ]['OS'] = php_uname();

		if (! empty( $_SERVER['SERVER_SOFTWARE'] ) ) {
			$this->buffer[ $key ]['HTTP server'] = $_SERVER['SERVER_SOFTWARE'];
		} else {
			$this->buffer[ $key ]['HTTP server'] = 'N/A';
		}

		$this->buffer[ $key ]['PHP'] = strtoupper( PHP_SAPI ) .' '. PHP_VERSION;

		if ( extension_loaded('Zend OPcache') ) {
			$this->buffer[ $key ]['Opcode cache'] = sprintf(
				'Zend OPcache (%s)', ini_get('opcache.enable') ? 'enabled':'disabled'
			);
		} elseif ( extension_loaded('wincache') ) {
			$this->buffer[ $key ]['Opcode cache'] = sprintf(
				'wincache (%s)', ini_get('wincache.fcenabled') ? 'enabled':'disabled'
			);
		}

		$this->buffer[ $key ]['Memory limit']			= ini_get('memory_limit');
		$this->buffer[ $key ]['Peak limit']				= number_format( memory_get_peak_usage() );
		$this->buffer[ $key ]['Max execution time']	= ini_get('max_execution_time') .'s';
		$this->buffer[ $key ]['Disabled functions']	= ini_get('disable_functions');
		$this->buffer[ $key ]['Display errors']		= ini_get('display_errors');

		$tmp = ini_get('sys_temp_dir');
		if (! empty( $tmp ) ) {
			if ( is_writable( $tmp ) ) {
				$tmp .= ' (writable)';
			} else {
				$tmp .= ' (not writable!)';
			}
		}
		$tmp = $this->shorten_path( $tmp );
		$this->buffer[ $key ]['Temp directory']	= $tmp;
		$this->buffer[ $key ]['Log errors']			= ini_get('log_errors');
		$this->buffer[ $key ]['Error log']			= ini_get('error_log');
		$this->buffer[ $key ]['Last error']			= error_get_last();
	}


	/**
	 * Verify if some important PHP functions are available.
	 */
	private function function_exists( $key ) {

		$required_functions = [
			'register_shutdown_function',
			'register_tick_function',
			'stream_wrapper_unregister',
			'stream_wrapper_register',
			'stream_wrapper_restore'
		];

		foreach ( $required_functions as $function ) {
			$this->buffer[ $key ][ $function ] = function_exists( $function );
		}
	}


	/**
	 * Return the version and type (free/pro) of Code Profiler.
	 */
	private function cp_info( $key ) {

		if ( defined('CODE_PROFILER_PRO_VERSION') ) {
			$this->buffer[ $key ]['slug']		= 'code-profiler-pro';
			$this->buffer[ $key ]['version']	=	CODE_PROFILER_PRO_VERSION;

		} elseif ( defined('CODE_PROFILER_VERSION') ) {
			$this->buffer[ $key ]['slug']		= 'code-profiler';
			$this->buffer[ $key ]['version']	=	CODE_PROFILER_VERSION;

		} else {
			exit('Error: Code Profiler is not active. Please activate it and run this script again.');

		}

		// Data folder must be writable
		$upload_dir = wp_upload_dir();
		$dir = $upload_dir['basedir'] .'/'. $this->buffer[ $key ]['slug'];

		$this->buffer[ $key ]['data_dir']['path']			= $this->shorten_path( $dir );
		$this->buffer[ $key ]['data_dir']['exists']		= file_exists( $dir );
		$this->buffer[ $key ]['data_dir']['writable']	= is_writable( $dir );
	}


	/**
	 * Check if there are subclasses of the wpdb class and
	 * look for wp-content/db.php
	 */
	function check_wpdb( $key ) {

		foreach( get_declared_classes() as $class ) {
			$reflected = new ReflectionClass( $class );
			if ( $reflected->isSubclassOf('wpdb') ) {
				$script = $reflected->getFileName();
				$this->buffer[ $key ]['child'][$class] = $this->shorten_path( $script );
			}
		}
		$this->buffer[ $key ]['db.php'] = file_exists( WP_CONTENT_DIR .'/db.php');
	}


	/**
	 * Check for advanced cache
	 */
	private function check_cache( $key ) {

		$this->buffer[ $key ]['cache'] = defined('WP_CACHE') && file_exists(WP_CONTENT_DIR . '/advanced-cache.php');
	}


	/**
	 * Retrieve the list of all plugins and sort them
	 * (active or disabled).
	 */
	private function get_all_plugins( $key ) {

		if (! function_exists('get_plugins') ) {
			require_once ABSPATH .'wp-admin/includes/plugin.php';
		}
		$plugins = get_plugins();
		foreach( $plugins as $k => $v ) {
			if ( $slug = substr( $k, 0, strpos( $k, '/') ) ) {
			$this->buffer[ $key ][ $slug ] = $v['Version'];
			}
		}
	}


	/**
	 * Retrieve the active theme.
	 */
	private function get_theme( $key ) {

		$themes = wp_get_themes();
		$active = get_option('template');
		foreach( $themes as $k => $v ) {
			$version = $v->Version;
			if ( $k == $active ) {
				$version .= ' (active)';
			}
			$this->buffer[ $key ][ $k ] = $version;
		}
	}


	/**
	 * Remove the ABSPATH from a path
	 */
	private function shorten_path( $path ) {

		return str_replace( ABSPATH, '', $path );
	}

}

header('Content-Type: text/plain');
new CP_Troubleshooter();