Examples

PEAR Manual

About the examples

The following sections provide you with examples of using the different feature sets of Services_Yahoo. Currently this includes documentation for the interfaces to Yahoo! Search and Content Analysis.

All public methods in Services_Yahoo have in common that exceptions will be raised when something goes wrong. This is why try { ... } catch { } blocks are wrapped around all examples.

Note: The examples are designed to be run from a command line shell. If you would like to test them in a web browser you should replace \n with <br /> for better readability.

Speaking to Yahoo! Search

The following examples will communicate with Yahoo! Search.

Example 63-1. Web search: Listing results

This snippet issues a search query for the term Steve Fossett to Yahoo! Search. For each result in the returned result set the title is printed.

require_once "Services/Yahoo/Search.php";

try {
    $client = Services_Yahoo_Search::factory("web");
    $results = $client->searchFor("Steve Fossett");

    echo "Number of results: " . $results->getTotalResultsReturned() . "\n\n";

    foreach ($results as $result) {
        echo $result['Title'] . "\n";
    }

} catch (Services_Yahoo_Exception $e) {
    echo "Error: " . $e->getMessage() . "\n";

    foreach ($e->getErrors() as $error) {
        echo "* " . $error . "\n";
    }
}

By default 10 results are returned per request. This number can be modified using the method setResultNumber():

require_once "Services/Yahoo/Search.php";

try {
    $client = Services_Yahoo_Search::factory("web");

    // Get 20 results per query
    $results = $client->withResults(20)->searchFor("Steve Fossett");

    /* ... */

Example 63-2. Web search: Result details

This code again queries Yahoo! Search for Steve Fossett, but this time the details of the first result in the result set are printed.

require_once "Services/Yahoo/Search.php";

try {
    $client = Services_Yahoo_Search::factory("web");
    $results = $client->searchFor("Steve Fossett");

    if ($results->getTotalResultsReturned() > 0) {
        $info = $results->current();

        echo "Title: " . $info['Title'] . "\n";
        echo "Summary: " . $info['Summary'] . "\n";
        echo "URL: " . $info['Url'] . "\n";
        echo "clickable URL: " . $info['ClickUrl'] . "\n";
        echo "Modification date: " . $info['ModificationDate'] . "\n";
        echo "Mime type: " . $info['MimeType'] . "\n";
    }
    
} catch (Services_Yahoo_Exception $e) {
    echo "Error: " . $e->getMessage() . "\n";

    foreach ($e->getErrors() as $error) {
        echo "* " . $error . "\n";
    }
}

Example 63-3. Web search: Paginating results

In this example the "paginating" capabilities of Services_Yahoo are shown. Paginating means that the search results are split up into chunks of e.g. 20, which are displayed together with links to jump back and forth to other result chunks. Basically this mimicks the functionality from the bottom of official Yahoo Search Page.

TBD

Note: In order to query the Image, News, Video or Local search, one only needs to replace the argument "web" in the call of the factory() method with one of "image", "news", "video", or "local".

require_once "Services/Yahoo/ContentAnalysis.php"; try { $search = Services_Yahoo_ContentAnalysis::factory("termExtraction"); $search->setContext("Italian sculptors and painters of the " . "renaissance favored the Virgin Mary for inspiration."); $search->setQuery("madonna"); $results = $search->submit(); foreach ($results as $result) { echo $result . "\n"; } } catch (Services_Yahoo_Exception $e) { echo "Error: " . $e->getMessage() . "\n"; foreach ($e->getErrors() as $error) { echo "* " . $error . "\n"; } }

require_once "Services/Yahoo/ContentAnalysis.php"; try { $search = Services_Yahoo_ContentAnalysis::factory("spellingSuggestion"); $search->setQuery("madnna"); $results = $search->submit(); foreach ($results as $result) { echo $result . "\n"; } } catch (Services_Yahoo_Exception $e) { echo "Error: " . $e->getMessage() . "\n"; foreach ($e->getErrors() as $error) { echo "* " . $error . "\n"; } }

Examples

About the examples

Speaking to Yahoo! Search

Using the Yahoo! Content Analysis services

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