Allow multiple site.urls. See #549

If you upload an image on one of the sites, change the image address to relative path.

config/config.ini.example

@@ -132,6 +132,9 @@ generation.time = "false"
 ; Switch on and off the cache timestamp. Options "false" and "true"
 cache.timestamp = "false"
 
+; The site.url depends on where you are visiting from. Same installation 
+multi.site = "false"
+
 ; Set the theme here
 views.root = "themes/twentyfifteen"
 

content/data/configList.json

@@ -1 +1 @@
-["site.url","timezone","date.format","language","blog.title","blog.tagline","blog.description","blog.copyright","permalink.type","static.frontpage","blog.enable","social.twitter","social.facebook","breadcrumb.home","comment.system","fb.appid","fb.num","fb.color","disqus.shortname","google.wmt.id","google.analytics.id","google.gtag.id","google.reCaptcha","google.reCaptcha.public","google.reCaptcha.private","posts.perpage","category.perpage","tag.perpage","archive.perpage","search.perpage","profile.perpage","type.perpage","json.count","category.info","related.count","recent.count","popular.count","tagcloud.count","teaser.type","read.more","teaser.char","description.char","rss.count","rss.char","views.counter","sitemap.priority.base","sitemap.priority.post","sitemap.priority.static","sitemap.priority.category","sitemap.priority.tag","sitemap.priority.archiveDay","sitemap.priority.archiveMonth","sitemap.priority.archiveYear","sitemap.priority.author","sitemap.priority.type","prerelease","cache.expiration","cache.off","generation.time","cache.timestamp","views.root","views.layout"]
+["site.url","timezone","date.format","language","blog.title","blog.tagline","blog.description","blog.copyright","permalink.type","static.frontpage","blog.enable","social.twitter","social.facebook","breadcrumb.home","comment.system","fb.appid","fb.num","fb.color","disqus.shortname","google.wmt.id","google.analytics.id","google.gtag.id","google.reCaptcha","google.reCaptcha.public","google.reCaptcha.private","posts.perpage","category.perpage","tag.perpage","archive.perpage","search.perpage","profile.perpage","type.perpage","json.count","category.info","related.count","recent.count","popular.count","tagcloud.count","teaser.type","read.more","teaser.char","description.char","rss.count","rss.char","views.counter","sitemap.priority.base","sitemap.priority.post","sitemap.priority.static","sitemap.priority.category","sitemap.priority.tag","sitemap.priority.archiveDay","sitemap.priority.archiveMonth","sitemap.priority.archiveYear","sitemap.priority.author","sitemap.priority.type","prerelease","cache.expiration","cache.off","generation.time","cache.timestamp","multi.site","views.root","views.layout"]

system/admin/views/config-performance.html.php

@@ -78,6 +78,28 @@
     </div>
   </div>
   <br>
+  <h4>Multisite</h4>
+  <hr>
+  <div class="form-group row">
+    <label class="col-sm-2 col-form-label">Multisite</label>
+    <div class="col-sm-10">
+      <div class="col-sm-10">
+        <div class="form-check">
+          <input class="form-check-input" type="radio" name="-config-multi.site" id="multi.site1" value="true" <?php if (config('multi.site') === 'true'):?>checked<?php endif;?>>
+          <label class="form-check-label" for="multi.site1">
+            <?php echo i18n('Enable');?>
+          </label>
+        </div>
+        <div class="form-check">
+          <input class="form-check-input" type="radio" name="-config-multi.site" id="multi.site2" value="false" <?php if (config('multi.site') === 'false'):?>checked<?php endif;?>>
+          <label class="form-check-label" for="multi.site2">
+            <?php echo i18n('Disable');?>
+          </label>
+        </div>
+      </div>
+    </div>
+  </div>
+  <br>
   <h4><?php echo i18n('Github_pre_release');?></h4>
   <hr>
   <div class="form-group row">

system/includes/dispatch.php

@@ -14,11 +14,32 @@ function _log($message)
 
 function site_url()
 {
-    if (config('site.url') == null)
-        error(500, '[site.url] is not set');
+    if (config('multi.site') == "true"){
+        return rtrim(generateSiteUrl(), '/') . '/';
+    } else {
+        if (config('site.url') == null)
+            error(500, '[site.url] is not set');
+        // Forcing the forward slash
+        return rtrim(config('site.url'), '/') . '/';
+    }
+}
 
-    // Forcing the forward slash
-    return rtrim(config('site.url'), '/') . '/';
+function generateSiteUrl()
+{
+    $dir = trim(dirname(substr($_SERVER["SCRIPT_FILENAME"], strlen($_SERVER["DOCUMENT_ROOT"]))), '/');
+    if ($dir == '.' || $dir == '..') {
+        $dir = '';
+    }
+    $port = '';
+    if ($_SERVER["SERVER_PORT"] != "80" && $_SERVER["SERVER_PORT"] != "443") {
+        $port = ':' . $_SERVER["SERVER_PORT"];
+    }
+    $scheme = isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off' ? 'https' : 'http';
+    if ($dir === '') {
+        $siteUrl = $scheme . '://' . trim($_SERVER['SERVER_NAME'], "/") . $port . "/";
+        return;
+    }
+    return $siteUrl = $scheme . '://' . trim($_SERVER['SERVER_NAME'], "/") . $port . "/" . $dir . '/';
 }
 
 function site_path()
@@ -29,7 +50,7 @@ function site_path()
         error(500, '[site.url] is not set');
 
     if (!$_path)
-        $_path = rtrim(parse_url(config('site.url'), PHP_URL_PATH), '/');
+        $_path = rtrim(parse_url(site_url(), PHP_URL_PATH), '/');
 
     return $_path;
 }