帮助循环查找具有键和值的数组

发布于 2024-11-09 05:23:32 字数 754 浏览 0 评论 0原文

我正在尝试创建一个从 html 中提取文本的函数，用于多个步骤，但我不知道如何形成一个循环。

这就是任务。我有这个数组

$arr = array("<div>" => "</div>", "<p>" => "</p>", "<h3>" => "</h3>");

现有的工作函数 cut($a, $b, $c) 在这种情况下获取中间的内容 $a = "

", $b =“

” $c = html。

我想做的是做到这一点：

步骤 1 - 从 div 剪切到 div
步骤 2 - foreach 结果来自步骤 1，从 p 到 p
第 3 步 - foreach 来自第 2 步的结果，从 h3 剪切到 h3
步骤 n，其中 n 是数组长度。

虽然我知道我可以使用 foreach 来获取结果并应用第二步，但我不能概括这一点。

编辑

我有一个名为 cut 的现有函数，如上所述。我想创建一个名为 cutlayer($arr, $html) 的新函数，其中 $arr 是上面的 arr 。我需要 cutlayer 函数来使用剪切函数并执行上面提到的以下步骤，但我不知道如何做到这一点。

谢谢

原文

I am trying to make this function that extracts text from html for multiple steps but I cant figure out how to make a loop form it.

This is the task. I have this array

$arr = array("<div>" => "</div>", "<p>" => "</p>", "<h3>" => "</h3>");

The existing working function cut($a, $b, $c) that gets the content in between in this case $a = "<div>", $b="</div>" and $c = the html.

What i am trying to do is to make this:

Step 1 - cut from div to div
Step 2 - foreach results from step1,
cut from p to p
Step 3 - foreach results from step2,
cut from h3 to h3
Step n where n is array length.

Although I know that I can use foreach to get the results and apply step two, I cant generalize this.

EDIT

I have an existing function called cut that has been described above. I want to create a new function called cutlayer($arr, $html) where $arr is arr from above. I need the cutlayer function to use the cut function and do the following steps mentioned above but I cant figure out how to do that.

Thanks

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渡你暖光 2024-11-16 05:23:32

为了省去麻烦，请使用专为解析 HTML 设计的工具包。 PHP 的 DOMDocument 就是为这些任务而设计的。

$dom = new DOMDocument();
$dom->loadHTML($yourHTML);
$divs = $dom->getElementsByTagName("div");

// Get the inner contents of all divs, for example
foreach ($divs as $div) {
  echo $div->nodeValue;
}

除非这是家庭作业并且您被指示使用数组匹配方法......

Save yourself the trouble and use a toolkit designed for parsing HTML. PHP's DOMDocument is made for these tasks.

$dom = new DOMDocument();
$dom->loadHTML($yourHTML);
$divs = $dom->getElementsByTagName("div");

// Get the inner contents of all divs, for example
foreach ($divs as $div) {
  echo $div->nodeValue;
}

Unless this is homework and you were instructed to use your array matching method....

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