检索Blogger帖子网址

Question

I'm trying to retrieve posts from a Blogger using PHP and XML:

$file="BLOG URL/atom.xml";
$xml = simplexml_load_file($file);

And making a simple loop:

foreach ($xml->entry as $foo) {
    echo '<h2>' . $foo->title . '</h2>';
    echo '<p>' . $foo->updated . '</p>';
    echo $foo->link;
}

The only problem is that link is not showed.

Inspecting the code, each post has more than one link node:

<link href="" rel="replies" title="Postar comentários" type="application/atom+xml"/>
<link href="" rel="replies" title="0 Comentários" type="text/html"/>
<link href="" rel="edit" type="application/atom+xml"/>
<link href="" rel="self" type="application/atom+xml"/>
<link href="" rel="alternate" title="" type="text/html"/>

Is possible to get a node by his type atributte?

Answer 1

You can get this by looping through the links and selecting one. So change:

foreach ($xml->entry as $foo) {
    echo '<h2>' . $foo->title . '</h2>';
    echo '<p>' . $foo->updated . '</p>';
    echo $foo->link;
}

To:

foreach ( $xml->entry as $foo ) {
    echo '<h2>' . $foo->title . '</h2>';
    echo '<p>' . $foo->updated . '</p>';
    foreach ( $foo->link as $link ) {
        $type = (string) $link->attributes()->{'type'};
        if ( $type == 'text/html' ) {
            echo (string) $link->attributes()->{'title'};;
        }
    }
}

Where 'text/html' is the type you want to select.