数组值检索不起作用

Question

我有一个输入字段，我在其中粘贴一个 url，我想从 url 中获取详细信息，现在获取结果后，我无法将这些值分配给输入字段。可以看链接here

<form action="" method="POST">
    <input type="text" name="ref_url" placeholder="Paste the URL" value="https://www.lovely-cards.com/wedding-cards/1836-ethnica01.html">
    <input type="submit" value="Get Details">
</form>

<input type="text" name="height" value="<?php echo $tags[0]['height']; ?>">

PHP

<?php
include('simple_html_dom.php');

if (!EMPTY(isset($_POST['ref_url']))) {
    $url = $_POST['ref_url'];
    $html = file_get_html($url);
    $row = $html->find('tr');
    unset($row[0]);
    unset($row[1]);
    foreach($row as $element) {
        $tag_name = $element->find('td',0)->plaintext;
        $tag_value = $element->find('td',1)->plaintext;
        if (!EMPTY($tag_name) && !EMPTY($tag_value)) {
        $tags[] = array($tag_name =>$tag_value);        
        }
    }
    echo '<pre>';
    print_r($tags);
    echo '</pre>';
}

?>

Answer 1

它的“高度”不是您尝试设置的“高度”