使用 PHP 将 MySQL 中的内容插入段落

Question

我正在尝试使用 PHP 在我的 $article_content 中插入广告，我需要根据段落编号放置广告代码。

当我对 MySQL 执行 select 时，我得到了这个结构：

ID_ARTICLE |广告代码 |段落

可能大多数文章都会有 04 行数据（04 条广告），例如：

1 | adcode/adcode | 0
1 | adcode/adcode | 1
1 | adcode/adcode | 3
1 | adcode/adcode | 5

所以这是我的代码：

$pdo = ConectarSite();

$sql3 = "
SELECT
   art.id,
   ab.adcode,
   ap.paragraph 
FROM
   artigos art 
   LEFT JOIN
      anuncios_artigo aa 
      ON art.id = aa.id_artigo 
   LEFT JOIN
      anuncios_bloco ab 
      ON aa.id_anuncios_bloco = ab.id 
   LEFT JOIN
      anuncios_posicao ap 
      ON aa.id_anuncios_posicao = ap.id 
WHERE
   art.id = :id
";
$stmt3 = $pdo->prepare($sql3);
$stmt3->execute(['id' => '1']);


$article_content = '<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been</p>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been</p>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been</p>
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been</p>';

$doc = new DOMDocument();
$doc->loadHTML($article_content);

while($row3 = $stmt3->fetch()) {
    for ($i = 0; $i < $row3['paragraph']; $i++) {
        $p = $doc->getElementsByTagName('p');
        if ($i == $row3['paragraph']) {
            $ads = $doc->createElement('div', $row3['adcode']);
            $p->insertBefore($ads);
        }
    }

}

echo $doc->saveHTML();

我不知道如何正确创建 for

Answer 1

这是我所说的意思的一个例子：

You should create, fill and output your DOMDocument outside the main while ()` loop, only the inserting of the ads should be inside the loop.

$doc = new DOMDocument();
$doc->loadHTML($article_content);

foreach ($adverts as $row3) {
    $paragraphs = $doc->getElementsByTagName('p');
    for ($i = $paragraphs->length; --$i >= 0; ) {
        $paragraph = $paragraphs->item($i);
        if ($i + 1 == $row3['paragraph']) {
            $ads = $doc->createElement('div', $row3['adcode']);
            $paragraph->parentNode->insertBefore($ads, $paragraph);
        }
    }
}

echo $doc->saveHTML();

请注意段落项目运行从 0 到 n-1，并且由于您的段落编号运行s 从 1 到 n，因此需要更正。

使用 PHP 将 MySQL 中的内容插入段落

Insert content from MySQL to paragraph using PHP

php

mysql

dom