How PHP+HTML realizes WXML format conversion-PHP Problem-php.cn

How PHP+HTML realizes WXML format conversion

PHPz

Release： 2023-04-05 13:40:36

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With the popularity of small programs, WXML also emerged as a new web programming language. If you are a PHP developer, then you may need to convert your existing PHP website into WXML format to meet user needs. This article will introduce how to use PHP HTML technology to implement WXML format conversion.

1. What is WXML?

WXML is the component view language of WeChat applet. It uses tag language, similar to HTML and XML. Unlike HTML, tag names and attribute names in WXML must be lowercase letters. WXML has two special tags and . Among them, the tag is used to write JavaScript code, and the tag is used to import other WXML files, and only WXML files in the same directory as the current file can be imported.

WXML is characterized by customizable components, high reusability, plug-in development, and the development of complex and diverse interactive interfaces.

2. Convert PHP HTML to WXML

Use PHP to parse HTML

First, we need to use PHP to get the HTML code and parse the tags in the HTML and attributes, which can be achieved through PHP's DOMDocument class. The following code can read an HTML file and get the content in the

element:

$doc = new DOMDocument;
$doc->loadHTMLFile('example.html');

$divs = $doc->getElementsByTagName('div');
foreach ($divs as $div) {
    echo $div->nodeValue, PHP_EOL;
}

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Here, we use the loadHTMLFile method to load the HTML file. Then we can use the getElementsByTagName method to get the element object with the specified tag name, and then use the nodeValue attribute to get the content of the element.

Building WXML structure

In the process of converting the parsed HTML code into WXML format, we need to add the corresponding WXML tag to each element. For example, convert the following HTML code:

<div class="title">Hello World</div>

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into WXML code:

<view class="title">Hello World</view>

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We can use the following PHP code to achieve:

$doc = new DOMDocument();
$doc->loadHTMLFile('example.html');

$divs = $doc->getElementsByTagName('div');
$wxml = new DOMDocument("1.0", "UTF-8");

$views = $wxml->createElement('views');
$wxml->appendChild($views);

foreach ($divs as $div) {
    $view = $wxml->createElement('view');
    $view->setAttribute('class', $div->getAttribute('class'));
    $view->nodeValue = $div->nodeValue;

    $views->appendChild($view);
}

echo $wxml->saveXML();

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This code will parse out Convert each div tag in the HTML code to a view tag and add it to a parent views tag. During the conversion process, we use the setAttribute method to add a class attribute to the view tag, and use the nodeValue attribute to add content to it.

In this way, we convert HTML code into WXML format code. At the same time, we can also use more complex logic to process elements and add more attributes, styles and events to meet the needs of different WXML files.

3. Summary

This article introduces how to convert WXML format through PHP HTML technology. Although the syntax of WXML is more complex than HTML, it has better componentization characteristics and can create more complex and flexible interactive interfaces. By using PHP's DOMDocument class, we can easily convert existing PHP websites into WXML format to provide users with more convenient and efficient mini program services. We believe that in the near future, WXML will become a more important and widely used web programming language.

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