<?php
/**
* Checks Wordpress and PHP compatibility and loads compatibility functions as needed.
*
* IMPORTANT NOTE: this module is loaded by 'wassup_init' function before the WASSUPURL constant is set and before the 'wassup_options' global is set.
* Don't use WASSUPURL constant or the $wassup_options global variable here and don't call 'wassup_init' to set them!
*
* @package WassUp Real-time Analytics
* @subpackage compatibility.php module
* @since: v1.9.1
* @author: helened <http://helenesit.com>
*/
//abort if this is direct uri request for file
if(!empty($_SERVER['SCRIPT_FILENAME']) && realpath($_SERVER['SCRIPT_FILENAME'])===realpath(preg_replace('/\\\\/','/',__FILE__))){
//try track this uri request
if(!headers_sent()){
//triggers redirect to 404 error page so Wassup can track this attempt to access itself (original request_uri is lost)
header('Location: /?p=404page&werr=wassup403'.'&wf='.basename(__FILE__));
exit;
}else{
//'wp_die' may be undefined here
die('<strong>Sorry. Unable to display requested page.</strong>');
}
exit;
//abort if no WordPress
}elseif(!defined('ABSPATH') || empty($GLOBALS['wp_version'])){
//show escaped bad request on exit
die("Bad Request: ".htmlspecialchars(preg_replace('/(�*37;?|&?#0*37;?|�*38;?#0*37;?|%)(?:[01][0-9A-F]|7F)/i','',$_SERVER['REQUEST_URI'])));
}
//-------------------------------------------------
/**
* Return true if this Wordpress version is compatible with this Wassup
* @since v1.9.4
*/
function wassup_check_compatibility(){
global $wp_version;
$php_vers=phpversion();
$wassup_compatlib=WASSUPDIR.'/lib/compat-lib';
$is_compatible=true;
//check for minimum Wordpress compatibility
if(version_compare($wp_version,'4.5','<') || version_compare($php_vers,'5.2','<')){
if(version_compare($wp_version,'2.2','<')){
$is_compatible=false;
}elseif(version_compare($wp_version,'3.1','<') && function_exists('is_multisite') && is_multisite()){
$is_compatible=false;
}else{
$is_compatible=wassup_load_compat_modules();
}
}
return $is_compatible;
}
/** Load compatibility modules for Wordpress and PHP - @since v1.9.1 */
function wassup_load_compat_modules(){
global $wp_version;
$php_vers=phpversion();
$is_compatible=true;
$wassup_compatlib=WASSUPDIR.'/lib/compat-lib';
if(!file_exists($wassup_compatlib.'/compat_wp.php') && version_compare($wp_version,'3.1','<')){
$is_compatible=false;
}elseif(!file_exists($wassup_compatlib.'/compat_wassup.class.php') && version_compare($php_vers,'5.2','<')){
$is_compatible=false;
}else{
//Wordpress 2.8-3.1 & PHP 4.1-5.2 compatibility
if(version_compare($wp_version,'3.1','<')){
require_once($wassup_compatlib.'/compat_wp.php');
include_once($wassup_compatlib.'/compat_functions.php');
//load 'Wassup_Widget' base widget without the 'WP_Widget' parent class
if(version_compare($wp_version,'2.8','<')){
if(!class_exists('Wassup_Widget')){
include_once($wassup_compatlib.'/compat_widget.php');
}
}
//Wordpress 3.1-4.5 & PHP 4.1-5.2 compatibility
}elseif(version_compare($wp_version,'4.5','<') || version_compare($php_vers,'5.2','<')){
if(file_exists($wassup_compatlib.'/compat_functions.php')){
include_once($wassup_compatlib.'/compat_functions.php');
}
}
//PHP 4.1-5.2 compatibility
if(version_compare($php_vers,'5.2','<')){
if(!class_exists('wassupOptions')){
include_once($wassup_compatlib.'/compat_wassup.class.php');
}
if(!class_exists('Wassup_Widget')){
include_once($wassup_compatlib.'/compat_widget.php');
}
}
}
return $is_compatible;
} //end wassup_load_compat_modules
/**
* Show a message if this Wordpress version is incompatible with this copy of Wassup
* @since v1.9.1
*/
function wassup_show_compat_message(){
global $wp_version;
$msg="";
if(version_compare($wp_version,'2.2','<')){
$msg= __("Sorry, WassUp requires WordPress 2.2 or higher to work","wassup");
}else{
$php_vers=phpversion();
$wassup_compatlib=WASSUPDIR.'/lib/compat-lib';
$download_link='<a href="https://github.com/michelem09/wassup/releases/tag/v'.WASSUPVERSION.'">GitHub</a>';
if(version_compare($wp_version,'3.1','<')){
if(!file_exists($wassup_compatlib.'/compat_wp.php')){
$msg= __("WARNING! WassUp's backward compatibility modules are missing.","wassup");
$msg .= ' '.sprintf(__('Download and install the full version of Wassup with compatibility library included directly from %s.','wassup'),$download_link);
}
//multisite compatibility message @since v1.9.2
//WassUp works only in WP3.1 or higher for multisite
if(function_exists('is_multisite') && is_multisite()){
$msg =__("Sorry, WassUp requires WordPress 3.1 or higher to work in multisite setups","wassup");
}
}elseif(version_compare($php_vers,'5.2','<') && !file_exists($wassup_compatlib.'/compat_wassup.class.php')){
$msg= __("WARNING! WassUp's PHP compatibility modules are missing.","wassup");
$msg .= ' '.sprintf(__('Download and install the full version of Wassup with compatibility library included directly from %s.','wassup'),$download_link);
}
}
if(!empty($msg)){
if(version_compare($wp_version,'4.1','>=')) $mstyle='class="notice notice-warning is-dismissible"';
else $mstyle='class="fade error" style="padding:1em;"';
echo '<div '.$mstyle.'>'.$msg.'</div>';
}
}
?>