下面我们看一下，如何用PHP脚本调用Yahoo! Search API实现搜索的效果，全部脚本如下：
<?php
// Yahoo Web Services PHP Example Code
// Rasmus Lerdorf
// www.knowsky.com
$appid = 'YahooDemo';
// 在这输入你申请的ID号
$service = array('image'=>'http://api.search.yahoo.com/ImageSearchService/V1/imageSearch',
'local'=>'http://api.local.yahoo.com/LocalSearchService/V1/localSearch',
'news'=>'http://api.search.yahoo.com/NewsSearchService/V1/newsSearch',
'video'=>'http://api.search.yahoo.com/VideoSearchService/V1/videoSearch',
'web'=>'http://api.search.yahoo.com/WebSearchService/V1/webSearch');
?>
<html>
<head><title>PHP Yahoo Web Service Example Code</title></head>
<body>
<form action="YahooSearchExample.php" method="GET">
Search Term: <input type="text" name="query" /><br />
Zip Code: <input type="text" name="zip" /> (for local search)<br />
<input type="submit" value=" Go! " />
<select name="type">
<?php foreach($service as $name => $val) {
if(!empty($_REQUEST['type']) && $name == $_REQUEST['type'])
echo "<option SELECTED>$name</option>n";
else echo "<option>$name</option>n";
} ?>
</select>
</form>
<?php
function done() {?>
</body></html>
<?php
exit;
}
if(empty($_REQUEST['query']) || !in_array($_REQUEST['type'],array_keys($service))) done();
// Ok, here we go, we have the query and the type of search is valid
// First build the query
$q = '?query='.rawurlencode($_REQUEST['query']);
if(!empty($_REQUEST['zip'])) $q.="&zip=".$_REQUEST['zip'];
if(!empty($_REQUEST['start'])) $q.="&start=".$_REQUEST['start'];
$q .= "&appid=$appid";
// Then send it to the appropriate service
$xml = file_get_contents($service[$_REQUEST['type']].$q);
// Parse the XML and check it for errors
if (!$dom = domxml_open_mem($xml,DOMXML_LOAD_PARSING,$error)) {
echo "XML parse errorn";
foreach ($error as $errorline) {
/* For production use this should obviously be logged to a file instead */
echo $errorline['errormessage']."<br />n";
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