Display Google Custom Search results in WordPress if no posts/results found.

search.php

<?php
/* Add this code in theme's search.php file where you want to display search results from Google. */

$query = get_search_query();
$query_new =str_replace(' ','%20',$query);
$url = "http://ajax.googleapis.com/ajax/services/search/web?v=1.0&start=0&rsz=8&q=".$query_new;

$body = file_get_contents($url);

$json = json_decode($body);

for($x=0;$x<count($json->responseData->results);$x++){
?>
 
<p>
    <h2> <a href="<?php echo $json->responseData->results[$x]->url; ?>"><?php echo $json->responseData->results[$x]->title; ?> </a> </h2>
    <span> <?php echo $json->responseData->results[$x]->url;  ?> </span>
    <h4> <?php echo $json->responseData->results[$x]->content; ?> </h4>
</p>
<hr />
 
<?php
}
?>