Added code

src/config_example.php

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+<?php
+return [
+    'url' => 'http://www.tgnvoda.ru/avarii.php',
+    // Telegram
+    'Send_silent' => 'false',
+    'Telegram_token' => 'token',
+    'Telegram_channel' => '@channel'
+];
+?>

src/libs/simplehtmldom/LICENSE

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+MIT License
+
+Copyright (c) 2019 S.C. Chen, John Schlick, logmanoriginal
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

src/vodokanal.php

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+<?php
+
+// Connect library
+include('libs/simplehtmldom/simple_html_dom.php');
+
+// Load config
+$config = include('config.php');
+
+$db = null;
+if (file_exists("db.json")) {
+  $db = json_decode(file_get_contents('./db.json', true), true);
+  echo print_r($db);
+} else {
+  echo ("Database not exist\n");
+}
+
+// get DOM from URL
+$html = file_get_html($config['url']);
+
+$all_elements;
+
+$dateNow = date("d.m.Y");
+echo "Date now: " . $dateNow . "\n";
+
+foreach ($html->find('td[bgcolor="#ffffff"]') as $e) {
+  $date = "";
+  preg_match("/\\d{2}\\.\\d{2}\\.\\d{4}/", $e->plaintext, $date);
+
+  if (strcasecmp(reset($date), $dateNow) == 0) { // get current date posts
+    // remove date from content
+    $content = str_replace(reset($date), "", $e->plaintext);
+    $content = str_replace("\r\n \r\n", "", $content);
+    $content = str_replace("\n\n", "", $content);
+    // add post to array
+    $all_elements[] = $content;
+  }
+}
+
+echo "The number of posts for this day: " . count($all_elements) . "\n";
+
+if ($db != null) {
+  $diff = array_diff($all_elements, $db);
+  if ($diff != null) {
+    foreach ($diff as $e) {
+      echo "Message sended.\n";
+      send_telegram_message($e);
+    }
+  } else {
+    echo "No changes.";
+    exit;
+  }
+} else {
+  foreach ($all_elements as $e) {
+    echo "Message sended.\n";
+    send_telegram_message($e);
+  }
+}
+
+ // save posts to database
+ $json = json_encode($all_elements, JSON_UNESCAPED_UNICODE);
+ file_put_contents("db.json", $json);
+
+function send_telegram_message($message)
+{
+  $message = str_replace(" ", "%20", $message); // fix for telegram
+  global $config;
+  $obj = json_decode(file_get_contents("https://api.telegram.org/bot" . $config['Telegram_token'] . "/sendMessage?chat_id=" . $config['Telegram_channel'] . "&disable_notification=" . $config['Send_silent'] . "&text=" . $message));
+
+  if ($http_response_header[0] != null && $http_response_header[0] == "HTTP/1.1 200 OK") {
+    try {
+      echo "Successfully sented message, mess id: " . $obj->{'result'}->{'message_id'} . "\n";
+    } catch (Exception $e) {
+      echo "Telegram: Не удалось записать id в файл\n";
+    }
+  } else {
+    echo "Telegram: Не удачный запрос: " . $http_response_header[0] . "\n";
+  }
+}