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Create an XML file using XMLWriter

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Instantiate a XMLWriter object: 

$xml = new XMLWriter();

Next open the file to which you want to write. For example, to write to /var/www/example.com/xml/output.xml, use: 

$xml->openUri('file:///var/www/example.com/xml/output.xml');

To start the document (create the XML open tag): 

$xml->startDocument('1.0', 'utf-8');

This will output: 

<?xml version="1.0" encoding="UTF-8"?>

Now you can start writing elements: 

$xml->writeElement('foo', 'bar');

This will generate the XML: 

<foo>bar</foo>

If you need something a little more complex than simply nodes with plain values, you can also “start” an element and add attributes to it before closing it: 

$xml->startElement('foo');
$xml->writeAttribute('bar', 'baz');
$xml->writeCdata('Lorem ipsum');
$xml->endElement();

This will output: 

<foo bar="baz"><![CDATA[Lorem ipsum]]></foo>
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XML:
* XML
* Create a XML using DomDocument
* Read a XML document with DOMDocument
* Create an XML file using XMLWriter
* Read a XML document with SimpleXML
* Leveraging XML with PHPs SimpleXML Library
Table Of Contents
0 Getting started
1 Variables
2 Arrays
3 Functional programming
4 Types
5 Autoloading primer
6 Exception handling and error reporting
7 Working with dates and time
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11 Classes and objects
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13 Output buffering
14 JSON
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18 Dependency injection
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35 UTF-8
36 URLs
37 Object serialization
38 PHPDoc
39 Contributing to PHP Manual
40 String parsing
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46 Type juggling and non-strict comparison issues
47 Security
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55 References
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57 Installing PHP on Windows
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62 Installing on Linux / Unix
63 Contributing to PHP Core
64 Coding conventions
65 Using MongoDB
66 Asynchronous programming
67 Using SQLSRV
68 Unicode Support
69 Functions
70 Create PDF files
71 Hot to detect client IP address
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73 Image processing with GD
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75 SOAP Server
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83 Sockets
84 Outputting the value of a variable
85 String formatting
86 Compile PHP extensions
87 MongoDB
88 Manipulating an array
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90 Processing multiple arrays together
91 SPL data structures
92 Comments
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95 Imagick
96 SimplXML
97 HTTP Authentication
98 Recipies
99 BC Math Binary Calculator
100 Docker deployment
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102 APCu
103 Design patterns
104 Secure remember me
105 PHP mysqli
106 PHP built-in server
107 How to break down an URL
108 PSR
109 Contributors