使用 PHP 选择特定的 Tumblr XML 值 [英] Select specific Tumblr XML values with PHP

问题描述

我的目标是使用他们提供的 XML 将 Tumblr 帖子嵌入到网站中.问题是 Tumblr 会为您发布的每张图片保存 6 种不同尺寸的图片.我下面的代码将获得第一张图像，但它恰好太大了.如果所有照片都具有相同的 标签，如何从 XML 中选择一张较小尺寸的照片?

→这是我正在使用的 Tumblr 中的 XML:Tumblr XML.

→到目前为止，这是我的 PHP 代码:

posts->post->{'photo-caption'};$photo = $xml->posts->post->{'photo-url'};echo '<h1>'.$title.'</h1>';echo '<img src="'.$photo.'"/>"';回声……"；echo "</br><a target=frame2 href='".$link."'>阅读更多</a>";?>

解决方案

getPhoto 函数接受一个 $photos 数组和一个 $desiredWidth>.它返回 max-width (1) 最接近和 (2) 小于或等于 $desiredWidth 的照片.您可以调整该功能以满足您的需要.需要注意的重要事项是:

• $xml->posts->post->{'photo-url'} 是一个数组.
• $photo['max-width'] 访问 标签上的 max-width 属性.

我使用了 echo '

';print_r($xml->posts->post);echo '</pre>'; 找出 $xml->posts->post->{'photo-url'} 是一个数组.
我在 SimpleXMLElement.
function getPhoto($photos, $desiredWidth) {$currentPhoto = NULL;$currentDelta = PHP_INT_MAX;foreach ($photos as $photo) {$delta = abs($desiredWidth - $photo['max-width']);如果 ($photo['max-width'] <= $desiredWidth && $delta < $currentDelta) {$currentPhoto = $photo;$currentDelta = $delta;}}返回 $currentPhoto;}$request_url = "http://kthornbloom.tumblr.com/api/read?type=photo";$xml = simplexml_load_file($request_url);foreach ($xml->posts->post as $post) {echo '<h1>'.$post->{'photo-caption'}.'</h1>';echo '<img src="'.getPhoto($post->{'photo-url'}, 450).'"/>"';echo "...";echo "</br><a target=frame2 href='".$post['url']."'>阅读更多</a>";}
My goal is to embed Tumblr posts into a website using their provided XML. The problem is that Tumblr saves 6 different sizes of each image you post. My code below will get the first image, but it happens to be too large. How can I select one of the smaller-sized photos out of the XML if all the photos have the same tag of <photo-url>? 

→ This is the XML from my Tumblr that I'm using: Tumblr XML.

→ This is my PHP code so far:
<?php
$request_url = "http://kthornbloom.tumblr.com/api/read?type=photo";
$xml = simplexml_load_file($request_url);
$title = $xml->posts->post->{'photo-caption'};
$photo = $xml->posts->post->{'photo-url'};
echo '<h1>'.$title.'</h1>';
echo '<img src="'.$photo.'"/>"'; 
echo "…";
echo "</br><a target=frame2 href='".$link."'>Read More</a>"; 
?>

解决方案
The function getPhoto takes an array of $photos and a $desiredWidth. It returns the photo whose max-width is (1) closest to and (2) less than or equal to $desiredWidth. You can adapt the function to fit your needs. The important things to note are:


$xml->posts->post->{'photo-url'} is an array.
$photo['max-width'] accesses the max-width attribute on the <photo> tag.


I used echo '<pre>'; print_r($xml->posts->post); echo '</pre>'; to find out $xml->posts->post->{'photo-url'} was an array.

I found the syntax for accessing attributes (e.g., $photo['max-width']) at the documentation for SimpleXMLElement.
function getPhoto($photos, $desiredWidth) {
    $currentPhoto = NULL;
    $currentDelta = PHP_INT_MAX;
    foreach ($photos as $photo) {
        $delta = abs($desiredWidth - $photo['max-width']);
        if ($photo['max-width'] <= $desiredWidth && $delta < $currentDelta) {
            $currentPhoto = $photo;
            $currentDelta = $delta;
        }
    }
    return $currentPhoto;
}

$request_url = "http://kthornbloom.tumblr.com/api/read?type=photo";
$xml = simplexml_load_file($request_url);

foreach ($xml->posts->post as $post) {
    echo '<h1>'.$post->{'photo-caption'}.'</h1>';
    echo '<img src="'.getPhoto($post->{'photo-url'}, 450).'"/>"'; 
    echo "...";
    echo "</br><a target=frame2 href='".$post['url']."'>Read More</a>"; 
}


                        
这篇关于使用 PHP 选择特定的 Tumblr XML 值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！