notify.me.php

gistfile1.aw

<?php

include("simple_html_dom.php");

//settings on top
$siteToCheck = array(

     array("url"=>"http://davidwalsh.name/","selector"=>"div[id='bigShow']"),
     array("url"=>"http://www.loto6-49.ro/","selector"=>"div[class='numere_castigatoare_div']"),
     array("url"=>"http://christianheilmann.com/","selector"=>"div[id='pad']/div[1]"),
     array("url"=>"http://addyosmani.com/blog/","selector"=>"div[id='content']/div[1][class='entry-wrap']/h1[class='entry-title']")
);

$savePath = "cachedPage33/";

if(!is_dir($savePath)) {

   if(!mkdir($savePath,0777)) {
      die('Failed to create folder');
   }
}

$emailContent = "";

//for every page to check
foreach($siteToCheck as $site) {

   $url = $site["url"];
   //calculate the cachedPage name and set oldContent = ""

   $fileName = md5($url);

   $html = file_get_html($url);

   foreach($html->find($site['selector']) as $element) {

       $currentContent = $element->innertext; 
       break;       
   }

   $currentContent = preg_replace("/\n|\t/"," ",$currentContent);
   
   if(file_exists($savePath.$fileName)) {
      $oldContent = file_get_contents($savePath.$fileName);
   }

   if($oldContent && $oldContent != $currentContent) {    
      //do stuff
      //we can tweet to an address
      //we can send a simple email
      //we can text ourselves 
      $emailContent .="Adrian, the following page has changed! \n\n" . $url . "\n\n"; 
    }

   file_put_contents($savePath.$fileName,$currentContent);
} 

//if we have contents then mail it
if($emailContent) {

   $to = "mergesortv@gmail.com";

   $subject = "Sites have changed!";

$message = "
  <h2>Parse Web Pages with PHP Simple HTML DOM</h2>
  <p>Armed with the ability to pick content from DOM nodes with PHP, it's time to analyze websites for changes!</p>
  <table>
    <tr><td>$emailContent</td></tr>
  </table>";

//to send HTML mail must be set Content-type header
$headers  = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
$headers .= 'From: [Reflexive] <adrian@thinkphp.ro>' . "\r\n";

   //mail it
   //mail($to, $subject, $message, $headers);

   //for debug
   echo$emailContent;

} else {

  echo"<h2>Everything is Up-to-date</h2>";
}

?>