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PHP5-Client for Yahoo's Webservice API

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Stephan Schmidt

Posts: 238
Nickname: schst
Registered: Sep, 2004

Stephan Schmidt is a founding member of PHP Application Tools and a PEAR developer.

PHP5-Client for Yahoo's Webservice API

Posted: Mar 7, 2005 10:03 AM

This post originated from an RSS feed registered with PHP Buzz by Stephan Schmidt.
Original Post: PHP5-Client for Yahoo's Webservice API Feed Title: a programmer's best friend Feed URL: http://blog.php-tools.net/rss.php?version=1.0 Feed Description: The blog of PHP Application Tools	Latest PHP Buzz Posts Latest PHP Buzz Posts by Stephan Schmidt Latest Posts From a programmer's best friend

Our new member Daniel Wiegand (wiegi) implemented a PEAR compatible client for Yahoo's new REST-based webservice API. From the Yahoo developer site: "Yahoo! Search Web Services allow you to access Yahoo content and services in your favorite programming languages. This means you can now build Yahoo directly into your own applications." By using Daniel's PHP5 client you do not need to worry about the protocol or the resulting XML format, everything is done in plain PHP:

<?PHP
$yahoo = new Services_Yahoo($appId);
try {
    // do a simple search
    $result = $yahoo->searchWeb('PEAR');
    
    echo "Total results returned: " . $result->getTotal() . "<br />\n";
    
    foreach ($result as $entry) {
        
        printf('<a href="%s">%s</a><br />', $entry['ClickUrl'], $entry['Title']);
        printf('<i>%s</i><br /><br />', $entry['Summary']);
    }        
} catch (Services_Yahoo_Exception $e){
    echo $e;
}
?>

Besides searchWeb() the client provides more methods to use the different web services offered by Yahoo:

searchImages()
searchVideos()
searchNews
searchLocal()

Each of the methods can be used with several parameters that need to be passed in a fixed parameter order or you may pass a associative array that contains any parameters you want to pass.
As Daniel has been using PHP5 all of these methods return a Services_Yahoo_Result object that provides methods to return the total number of search results but can be iterated like a normal object, thanks to SPL. This result object offers a lot more, as you can use it to fetch the next page using the same search parameters:

<?PHP
$yahoo = new Services_Yahoo($appId);
try {
    // do a simple search
    $result = $yahoo->searchWeb('Graceland');
    
    printf("Total results returned: %d<br />\n", $result->getTotal());
    printf("Fetching %d entries starting from %d.<br />\n", $result->getReturned(), $result->getCurrent());
    
    foreach ($result as $entry) {
        
        printf('<a href="%s">%s</a><br />', $entry['ClickUrl'], $entry['Title']);
        printf('<i>%s</i><br /><br />', $entry['Summary']);
    }
    
    echo "Test, whether more entries are available....<br /><br />\n";
    if ($result->hasNext()) {
        $result->fetchNext();
    }
    
    printf("Fetching %d entries starting from %d.<br />\n", $result->getReturned(), $result->getCurrent());
    
    foreach ($result as $entry) {
        
        printf('<a href="%s">%s</a><br />', $entry['ClickUrl'], $entry['Title']);
        printf('<i>%s</i><br /><br />', $entry['Summary']);
    }
    
} catch (Services_Yahoo_Exception $e){
    echo $e;
}
?>

Quite cool, isn't it?
You can take a loot at the sources at http://pear.php-tools.net/projects/Services_Yahoo/ or even download a PEAR installable package from http://pear.php-tools.net/projects/Services_Yahoo/Services_Yahoo-0.1.0.tgz (requires PHP5, XML_Serializer and HTTP_Request).

We would have loved to propose this to PEAR, but there already is a draft for a Services_Yahoo package by Martin Jansen, but until now he hasn't showed any of his code. Hopefully Daniel and Martin could be working on a package together.

Read: PHP5-Client for Yahoo's Webservice API

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