"Today I Learned" or little things I learned day by day.
Open /config/database.php and change charset, collation accordingly.
<?php
$doc = new DOMDocument();
libxml_use_internal_errors(true);
$doc->loadHTML($htmlDocument);
$finder = new DomXPath($doc);
$node = $finder->query("//*[contains(@class, 'className')]");
print_r($doc->saveHTML($node->item(0)));
?>