HTML scraping with e-mail notification example

gistfile1.php

<?php

error_reporting(E_ERROR | E_PARSE);

$dom = new DOMDocument;
$dom->loadHTMLFile('http://www.crowdrise.com/jobraising/');
$node = $dom->getElementById('causes_module');

$finder = new DomXPath($dom);
$classname="profile";
$nodes = $finder->query("(//div[@id='causes_module'])[1]/div/div[contains(concat(' ', normalize-space(@class), ' '), ' $classname ')]");

$results = array();

foreach($nodes as $node){
  $name = $amount = '';
  foreach($node->getElementsByTagName('h4') as $node2){
    $name = trim($node2->nodeValue);
  }
  foreach($node->getElementsByTagName('h3') as $node2){
    $amount = $node2->nodeValue;
  }
  $results[] = array('name'=>$name,'amount'=>$amount);
}

$key = 0;
for($i = 0; $i < count($results); $i++){
  if(!strcmp($results[$i]['name'],'YouthBiz')){
    $key = $i;
  }
}

$newplace = $key + 1;
$threshold = 4;

$file = '/var/www/zxzx.co/crowdrise/youthbizplace.txt';
if(file_exists($file)){
  $oldplace = file_get_contents($file);
  if($oldplace != $newplace){
    echo "At last check, YouthBiz was in place $oldplace, and now it is in place $newplace<br />";
    file_put_contents($file, $newplace);

    $upName = $results[$newplace-2]['name'];
    $upAmount = $results[$newplace-2]['amount'];
    $upPlace = $newplace - 1;
    $downName = $results[$newplace]['name'];
    $downAmount = $results[$newplace]['amount'];
    $downPlace = $newplace + 1;
    $amount = $results[$newplace-1]['amount'];
    $headers = "From: AB <test@test.com>" . "\r\n" . 'Reply-To: AB <test@test.com>' . "\r\n" . "BCC: test@test.com";
    $to = 'AB <test@test.com>, BB <test@test.com>';
    $body = "$upName is in place $upPlace with $upAmount and $downName is in place $downPlace with $downAmount\n\nGo to http://www.crowdrise.com/jobraising/ for complete information";

    // only send alerts if crosses threshold
    if(false){
      if($oldplace <= $threshold && $newplace > $threshold){
        $subject = "YouthBiz has fallen to place $newplace with $amount";
        echo "$subject. $body<br />";
        mail($to, $subject, $body, $headers);
      } else if($oldplace > $threshold && $newplace <= $threshold) {
        $subject = "YouthBiz has risen to place $newplace with $amount";
        echo "$subject. $body<br />";
        mail($to, $subject, $body, $headers);
      }
    } else {
      if($oldplace < $newplace){
        $subject = "YouthBiz has fallen to place $newplace with $amount";
        echo "$subject. $body<br />";
        mail($to, $subject, $body, $headers);
      } else {
        $subject = "YouthBiz has risen to place $newplace with $amount";
        echo "$subject. $body<br />";
        mail($to, $subject, $body, $headers);
      }
    }

  } else {
    echo "YouthBiz is still in place $oldplace<br />";
  }
} else {
  echo "YouthBiz is in place $newplace<br />";
  echo file_put_contents($file, $newplace);
}

?>