Question

我想要更新，而不是将<?php readfile("http://www.website.com/footer.php");?>用于网站的每个部分（页脚，标题，贝宝形式等），我如何合并所有部分（如下所示）一个php文件，然后将该文件的特定行回显到html。

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Answer 1

您似乎希望使用php抓取html元素，然后将已删除的html元素保存到新的html文件中。执行此操作的一种好方法是使用DomDocument类和xpath查询来查找元素。然后创建一个新的html文档并将找到的元素追加到新文档中，并保存到文件中。例如：

<?
//create array of element tags to be scraped from target url
$elements = ["header", "div"];
//get html from target url
$html = file_get_contents('http://www.nytimes.com');

//instantiate new instance DOMDocument for target html.
$dom = new DOMDocument();
libxml_use_internal_errors(TRUE); //disable libxml errors
$dom->loadHTML($html);
libxml_clear_errors();
//instantiate DOMXPath for the ability to do xpath queries.
//xpath is powerful for this example using basic query can be used to query by class id etc
//DOMDocument powerful too. Read documents here: http://php.net/manual/en/class.domdocument.php
$xpath = new DOMXPath($dom);

//instantiate DOMDocument for new HTML document where founds elements from target will be saved to.
$new_dom = new DOMDocument();
$new_dom->formatOutput = true;
//save basic html element to document
$new_dom->loadXML("<html></html>");
$new_dom->saveXML();

//iterate over $elements array
foreach($elements as $element){
    //query by xpath for the element
    $element_node = $xpath->query("//".$element);
    //iterate over found elements and add to the new html document
    foreach($element_node as $row){
        $node = $new_dom->importNode($row, true);
        $new_dom->documentElement->appendChild($node);
        $new_dom->saveXML();
    }
}
//save found elements to new html document
$new_dom->save('test.html');

从包含html的php文件中回显特定行

1 个答案: