Use PHP and XML to parse and generate data

With the continuous development and popularization of Internet technology, data analysis and generation have become important technical requirements. As an open source server-side programming language, PHP has good data processing capabilities and is easy to learn and use. It has become one of the important technical means to achieve data analysis and generation. This article will introduce how to use PHP and XML to parse and generate data.

1. What is XML?

XML, Extensible Markup Language, is a markup language used to describe data. It can be compared with HTML and is more flexible. The syntax rules of the XML language are very strict, and it can be used to represent, store, and transmit text and data. Compared to HTML, the XML language is designed to transmit data rather than display it.

2. How to parse XML?

Using PHP to parse XML files is mainly achieved by using the simplexml_load_file() function in PHP. The simple xml_load_file() function can search for nodes and obtain attributes in XML files.

The layout of the XML file is as follows:

John

20

Smith

25

The code is as follows:

$xml=simplexml_load_file("authors.xml") or die(" can not load");

foreach($xml->children() as $books)

{

echo "Author Name: " . $books-> ;name . ", Author Age: " . $books->age . "
";

}

?>

3. How to generate XML?

Using PHP to generate XML files can also be achieved with the simplexml_load_file() function. First, we need to create a DOMDocument object, then add a root node, and add multiple child nodes to the root node.

The code is as follows:

$xmlDoc = new DOMDocument();

$root = $xmlDoc->appendChild($ xmlDoc->createElement("authors"));

$author1 = $root->appendChild($xmlDoc->createElement("author"));

$author1- >appendChild($xmlDoc->createElement("name","John"));

$author1->appendChild($xmlDoc->createElement("age",20));

$author2 = $root->appendChild($xmlDoc->createElement("author"));

$author2->appendChild($xmlDoc->createElement("name ","Smith"));

$author2->appendChild($xmlDoc->createElement("age",25));

echo $xmlDoc->saveXML( );

?>

The above code can generate the following XML file:

John

20

Smith

25

This article introduces how to parse and generate data through PHP and XML. You can easily parse XML files and get nodes and attributes using the simplexml_load_file() function. XML files can be created and generated using the DOMDocument object and the createElement() and appendChild() functions. In general, the combination of PHP and XML technology can help us achieve fast and efficient data parsing and generation.

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