PHP 从 html 文本中获取 <h[1-6]></h[1-6]> 值

Question

在我的代码中，我有以下正则表达式：

 preg_match_all('/<title>([^>]*)<\/title>/si', $contents, $match );

从网页中检索 <h>..</h> 标签。但有时它可能有 html 标签，例如 <strong>、<b> 等等，因此它需要一些修改，所以我尝试了这个

preg_match_all('/<h[1-6]>(.*)<\/h[1-6]>/si', $contents, $match );

但是出了点问题，无法检索 html <h> 标签中的内容。

你能帮我正确修改正则表达式吗？

Answer 1

当使用 (.*) 时，您可以获取所有内容，仅单词、数字和 space，也许您可以使用它们的范围并获取一个或多个：

preg_match_all('/<h[1-6]>([\w\d\s]+)<\/h[1-6]>/si', $contents, $match);

Answer 2

现在，这里没有正则表达式专家，但他应该站在你的立场上吗？他会这样做：

    <?php

        // SIMULATED SAMPLE HTML CONENT - WITH ATTRIBUTES:
        $contents = '<section id="id-1">And even when darkness covers your path and no one is there to lend a hand;
            <h3 class="class-1">Always remember that <em>There is always light at the end of the Tunnel <span class="class-2">if you can but hang on to your Faith!</span></em></h3>
            <div>Now; let no one deceive you: <h2 class="class-2">You will be tried in ever ways - sometimes beyond your limits...</h2></div>
            <article>But hang on because You are the Voice... You are the Light and you shall rule your Destiny because it is all about<h6 class="class4">YOU - THE REAL YOU!!!</h6></article>
            </section>';

        // SPLIT THE CONTENT AT THE END OF EACH <h[1-6]> TAGS   
        $parts      = preg_split("%<\/h[1-6]>%si", $contents);
        $matches    = array();

        // LOOP THROUGH $parts AND BUNDLE APPROPRIATE ELEMENTS TO THE $matches ARRAY.       
        foreach($parts as $part){
            if(preg_match("%(.*|.?)(<h)([1-6])%si", $part)){
                $matches[] = preg_replace("%(.*|.?)(<)(h[1-6])(.*)%si", "/>", $part);
            }
        }
        var_dump($matches);


        //DUMPS::::
        array (size=3)
          0 => string '<h3 class="class-1">Always remember that <em>There is always light at the end of the Tunnel <span class="class-2">if you can but hang on to your Faith!</span></em></h3>' (length=168)
          1 => string '<h2 class="class-2">You will be tried in ever ways - sometimes beyond your limits...</h2>' (length=89)
          2 => string '<h6 class="class4">YOU - THE REAL YOU!!!</h6>' (length=45)

作为函数，归结为：

 <?php

        function pseudoMatchHTags($htmlContentWithHTags){
            $parts      = preg_split("%<\/h[1-6]>%si", $htmlContentWithHTags);
            $matches    = array();
            foreach($parts as $part){
                if(preg_match("%(.*|.?)(<h)([1-6])%si", $part)){
                    $matches[] = preg_replace("%(.*|.?)(<)(h[1-6])(.*)%si", "/>", $part);
                }
            }
            return $matches;
        }

        var_dump(pseudoMatchHTags($contents));

您可以在这里进行测试：https://eval.in/571312 ...也许它有点帮助...我希望... ;-)

Answer 3

preg_match_all('<h\d>', $contents, $matches);

foreach($matches as $match){
$num[] = substr ( $match  , 1 , 1 );
}

PHP 从 html 文本中获取 <h[1-6]></h[1-6]> 值

PHP get the <h[1-6]></h[1-6]> values from an html text

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