PHP xml::fetch方法代码示例

* class_xml.php example usage
* Author: Troy Wolf (troy@troywolf.com)
*/
/*
Include the class. Modify path according to where you put the class file.
*/
require_once dirname(__FILE__) . '/class_xml.php';
/*
Instantiate a new xml object.
*/
$x = new xml();
/*
Pass a string containing your XML to the fetch() method.
*/
$source = file_get_contents("sample.xml");
if (!$x->fetch($source)) {
    /*
    The class has a 'log' property that contains a log of events. This log is
    useful for testing and debugging.
    */
    echo "<h2>There was a problem parsing your XML!</h2>";
    echo $x->log;
    exit;
}
/*
Display the data property's structure and contents.
*/
echo "<pre>\n";
print_r($x->data);
echo "</pre>\n";
/*

    exit;
}
// Note: The following lines can be uncommented to aid in debugging.
#echo "<pre>".$h->log."</pre><hr />\n";
#echo "<pre>".$h->header."</pre><hr />\n";
#echo "<pre>".$h->body."</pre><hr />\n";
#exit();
// Or, these next lines will display the result as an XML doc in the browser.
#header('Content-type: text/xml');
#echo $h->body;
#exit();
// The assumption now is that we've got an XML result back from the Exchange
// Server, so let's parse the XML into an object we can more easily access.
// For this task, we'll use Troy's xml class object.
$x = new xml();
if (!$x->fetch($h->body)) {
    echo "<h2>There was a problem parsing your XML!</h2>";
    echo "<pre>" . $h->log . "</pre><hr />\n";
    echo "<pre>" . $h->header . "</pre><hr />\n";
    echo "<pre>" . $h->body . "</pre><hr />\n";
    echo "<pre>" . $x->log . "</pre><hr />\n";
    exit;
}
// You should now have an object that is an array of objects and arrays that
// makes it easy to access the parts you need. These next lines can be
// uncommented to make a raw display of the data object.
#echo "<pre>\n";
#print_r($x->data);
#echo "</pre>\n";
#exit();
// And finally, an example of iterating the inbox folder names and url's to

function rss20($url = "", $ttl = 0, $count = 0)
{
    if (!$url) {
        echo "<h2>rss20: Oops! You need to pass a URL!</h2>";
        return false;
    }
    /*
    Use http object to retrieve raw RSS XML and to cache the data.
    Review class_http at http://www.troywolf.com/articles/class_http/
    */
    $h = new http();
    $h->dir = "../../../../../cache/";
    if (!$h->fetch($url, $ttl)) {
        /*
        The class has a 'log' property that contains a log of events. This log is
        useful for testing and debugging.
        */
        echo "<h2>There is a problem with the http request!</h2>";
        echo $h->log;
        exit;
    }
    /*
    Use xml object to parse the raw RSS XML.
    Review class_xml at http://www.troywolf.com/articles/class_xml/
    */
    $x = new xml();
    if (!$x->fetch($h->body)) {
        /*
        The class has a 'log' property that contains a log of events. This log is
        useful for testing and debugging.
        */
        echo "<h2>There was a problem parsing your XML!</h2>";
        echo $x->log;
        exit;
    }
    /*
    Some debugging help.
    */
    #echo "<hr />";
    #echo $h->log;
    #echo "<hr />";
    #echo $x->log;
    #echo "<pre>\n";
    #print_r($x->data);
    #echo "</pre>\n";
    /*
    Now that we have the RSS data parsed into an object, here is how to work with
    it.  
    */
    #$version = $x->data->RSS[0]->_attr->VERSION;
    #$channel_link = $x->data->RSS[0]->CHANNEL[0]->LINK[0]->_text;
    #$channel_title = $x->data->RSS[0]->CHANNEL[0]->TITLE[0]->_text;
    echo "<div class=\"rss\">\n";
    echo "<div class=\"head\">\n";
    echo "<a href=\"" . $x->data->RSS[0]->CHANNEL[0]->LINK[0]->_text . "\"><img border=\"0\" src=\"" . $x->data->RSS[0]->CHANNEL[0]->IMAGE[0]->URL[0]->_text . "\"" . " alt=\"" . $x->data->RSS[0]->CHANNEL[0]->TITLE[0]->_text . "\" /></a>";
    echo "</div>\n";
    $total_items = count($x->data->RSS[0]->CHANNEL[0]->ITEM);
    if ($count == 0 || $count > $total_items) {
        $count = $total_items;
    }
    for ($idx = 0; $idx < $count; $idx++) {
        $item = $x->data->RSS[0]->CHANNEL[0]->ITEM[$idx];
        echo "<div class=\"item\">\n";
        echo "<a class=\"title\" href=\"" . $item->LINK[0]->_text . "\">" . $item->TITLE[0]->_text . "</a>\n";
        echo "<div class=\"description\">" . $item->DESCRIPTION[0]->_text . "</div>\n";
        echo "<div class=\"pubdate\">" . $item->PUBDATE[0]->_text . "</div>\n";
        echo "</div>\n";
    }
    echo "</div>\n";
}