Actualización

plugin/nosearchindex/NoSearchIndex.php

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+<?php
+/* For licensing terms, see /license.txt */
+
+/**
+ * Class NoSearchIndex.
+ */
+class NoSearchIndex extends Plugin
+{
+    public $addCourseTool = false;
+
+    /**
+     * NoSearchIndex constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct(
+            '0.1',
+            'Julio Montoya',
+            [
+                'tool_enable' => 'boolean',
+            ]
+        );
+    }
+
+    /**
+     * @return $this
+     */
+    public static function create()
+    {
+        static $result = null;
+
+        return $result ? $result : $result = new self();
+    }
+}

plugin/nosearchindex/README.md

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+No search index
+===
+
+This plugin allows administrators to hide the portal from search engines using the robots.txt file and adding a meta tag "noindex". It modifies the robots.txt file to add 'Disallow: /' and also adds ```<meta name="robots" content="noindex" />``` to the file app/home/header_extra_content.txt that correspond to the content of the variable "Extra content in header"

plugin/nosearchindex/index.php

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+<?php

plugin/nosearchindex/install.php

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+<?php

plugin/nosearchindex/lang/english.php

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+<?php
+
+$strings['plugin_title'] = "No search engine index";
+$strings['plugin_comment'] = "Hide portal from search engine bots.";
+$strings['tool_enable'] = 'Enable plugin';
+
+$strings['CheckTheWritingPermissionsOfRobotsFile'] = 'The plugin needs to create/edit some files: /robots.txt, /robots.dist.txt, /app/home/header_extra_content.txt check your file permissions.';
+$strings['CheckDirectoryPermissionsInX'] = 'Check write and read permissions in the path %s ';

plugin/nosearchindex/plugin.php

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+<?php
+/* For licensing terms, see /license.txt */
+
+/**
+ * @package chamilo.plugin
+ */
+
+/** @var \NoSearchIndex $plugin */
+$plugin = NoSearchIndex::create();
+$plugin_info = $plugin->get_info();
+
+$isPlatformAdmin = api_is_platform_admin();
+$editFile = false;
+
+$file = api_get_path(SYS_PATH).'robots.txt';
+$originalFile = api_get_path(SYS_PATH).'robots.dist.txt';
+$extraContentFile = api_get_home_path().'header_extra_content.txt';
+
+if ($isPlatformAdmin) {
+    /** @var FormValidator $form */
+    $form = $plugin_info['settings_form'];
+
+    if ($form && $form->validate()) {
+        if (is_writable(api_get_path(SYS_PATH))) {
+            if (!file_exists($originalFile)) {
+                copy($file, $originalFile);
+            }
+        } else {
+            Display::addFlash(
+                Display::return_message(
+                    sprintf(
+                        $plugin->get_lang('CheckDirectoryPermissionsInX'),
+                        api_get_path(SYS_PATH)
+                    ),
+                    'warning'
+                )
+            );
+        }
+
+        if (!file_exists($extraContentFile)) {
+            file_put_contents($extraContentFile, '');
+        }
+
+        $values = $form->getSubmitValues();
+
+        $continue = false;
+        if (file_exists($file) && is_readable($file) && is_writable($file) &&
+            file_exists($originalFile) && is_readable($originalFile) && is_writable($originalFile) &&
+            file_exists($extraContentFile) && is_readable($extraContentFile) && is_writable($extraContentFile)
+        ) {
+            $continue = true;
+        }
+
+        if ($continue) {
+            $contents = file_get_contents($originalFile);
+            $noFollow = '<meta name="robots" content="noindex" />';
+            if (isset($values['tool_enable']) && $values['tool_enable'] == 'true') {
+                $result = file_put_contents($file, $contents."\nDisallow: /\n");
+                $value = '';
+                if (file_exists($extraContentFile)) {
+                    $backup = file_get_contents($extraContentFile);
+                    file_put_contents($extraContentFile, $backup.$noFollow);
+                } else {
+                    $value = file_put_contents($extraContentFile, $noFollow);
+                }
+            } else {
+                file_put_contents($file, $contents);
+
+                if (file_exists($extraContentFile)) {
+                    $backup = file_get_contents($extraContentFile);
+                    $backup = str_replace($noFollow, '', $backup);
+                    file_put_contents($extraContentFile, $backup);
+                }
+            }
+        } else {
+            api_delete_settings_params(
+                [
+                    'category = ? AND access_url = ? AND subkey = ? AND type = ? and variable = ?' => [
+                        'Plugins',
+                        api_get_current_access_url_id(),
+                        'nosearchindex',
+                        'setting',
+                        'nosearchindex_tool_enable',
+                    ],
+                ]
+            );
+            $form->setElementError('tool_enable', $plugin->get_lang('CheckTheWritingPermissionsOfRobotsFile'));
+        }
+    }
+    $plugin_info['settings_form'] = $form;
+}