I hope that this guide will help the new API developers in gaining a better understanding of the Google API so as to develop their own applications.
Stuff you need before coding
1. This guide uses NuSOAP class as the interaction with the Google web services. You can download the class at:
http://sourceforge.net/projects/nusoap/
2. A Google API license key is required. You can apply it here:
https://www.google.com/accounts/New...e.com/createkey
3. This guide is short and coded in PHP to ensure an easier understanding.
Live Demo
A live demo can be found at:
http://www.useseo.com/google-api-demo.php
The script is also available for download. Simply change the Google key so that the script can work.
Coding
The following codes are the essential part of the script once the form button is pressed:
PHP Code:
<?php
require_once('lib/nusoap.php'); // include the nusoap class
if(isset($_POST['submit'])) { // upon button pressed
//trim the user's url
$qurl=trim($_POST['url']);
$mq='site:'.$qurl;
$parameters = array(
'key'=> 'Your_Google_API_Key',
'q'=> $mq,
'start'=> '0',
'maxResults'=>'10',
'filter'=> 'false',
'restrict'=>'',
'safeSearch'=>'false',
'lr'=>'',
'ie'=>'',
'oe'=>''
);
//Create a new soap client, feeding it googlesearch.wsdl
$soapclient=new soapclient('http://api.google.com/GoogleSearch.wsdl','wsdl');
//save the results into $results array
$results = $soapclient->call('doGoogleSearch',$parameters);
//save the total number of pages indexed
$no_pages=$results['estimatedTotalResultsCount'];
}
?>
Code explanation
The first line includes the
NuSOAP class for later usage.
The
url keyed in by the user was appended with the
site: operator on the left and saved in the
parameter array.
Further details of the parameters can be found at:
http://code.google.com/apis/soapsea...erence.html#2_1
Finally, the results are saved in the
$no_pages variable for display.
Other possible usage
As we only used the
estimatedTotalResultsCount element here, there are many other elements that you can make use of to develop other applications. The format of the search response from Google can be found at:
http://code.google.com/apis/soapsea...erence.html#3_1
Hope it helps
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