Change and Update WordPress URLS in Database When Site is Moved to new Host

UPDATE wp_options SET option_value = replace(option_value, 'http://www.oldurl', 'http://www.newurl') WHERE option_name = 'home' OR option_name = 'siteurl';

UPDATE wp_posts SET guid = replace(guid, 'http://www.oldurl','http://www.newurl');

UPDATE wp_posts SET post_content = replace(post_content, 'http://www.oldurl', 'http://www.newurl');

UPDATE wp_postmeta SET meta_value = replace(meta_value,'http://www.oldurl','http://www.newurl');

How to get href attribute value using PHP?

<?php

$str = '<a href="http://phpkishan.blogspot.in/">PHP Kishan Kachhadiya</a>';
$s = explode('href="',$str);
$t = explode('">',$s[1]);
print $t[0];

?>