PHP - xmlwriter_start_attribute_ns() 函数

定义和用法

XML 是一种标记语言，用于在网络上共享数据，XML 既可供人类阅读，也可供机器阅读。XMLWriter 扩展内部具有 libxml xmlWriter API，用于编写/创建 XML 文档的内容。此生成的 XML 文档是非缓存的，并且是单向的。

xmlwriter_start_attribute_ns() 函数用于创建命名空间属性标签的起始部分。

语法

xmlwriter_start_attribute_ns($writer, $prefix, $name, $uri);

参数

返回值

此函数返回一个布尔值，成功时为 TRUE，失败时为 FALSE。

PHP 版本

此函数首次引入于 PHP 5 版本，并在所有后续版本中均有效。

示例

以下示例演示了 xmlwriter_start_attribute_ns() 函数的用法：

<?php
   //Creating an XMLWriter
   $writer = new XMLWriter();
   $uri = "result.xml";

   //Opening a writer
   $writer = xmlwriter_open_uri($uri);

   //Starting the document
   xmlwriter_start_document($writer);

   //Starting an element
   xmlwriter_start_element($writer, 'Msg');

   //Setting the attribute 
   xmlwriter_start_attribute_ns($writer, 'ns', 'attr', 'test.uri'); 
   xmlwriter_text($writer, 'test_value'); 
   xmlwriter_end_attribute($writer);

   //Adding text to the element
   xmlwriter_text($writer, 'Welcome to Tutorialspoint');  

   //Ending the element
   xmlwriter_end_element($writer);

   //Ending the document
   xmlwriter_end_document($writer);
?>

这将生成以下 XML 文档：

<?xml version="1.0"?>
<Msg ns:attr="test_value" xmlns:ns="test.uri">Welcome to Tutorialspoint</Msg>

示例

以下是此函数面向对象风格的示例：

<?php
   //Creating an XMLWriter
   $writer = new XMLWriter();

   //Opening a writer
   $uri = "result.xml";
   $writer->openUri($uri);

   //Starting the document
   $writer->startDocument();

   //Starting an element
   $writer->startElement('Msg');

   //Setting the attribute 
   $writer->startAttributeNs('ns', 'attr', 'test.uri'); 
   $writer->text('test_value'); 
   $writer->endAttribute();

   //Adding text to the element
   $writer->text('Welcome to Tutorialspoint');  

   //Ending the element
   $writer->endElement();

   //Ending the document
   $writer->endDocument();
?>

这将生成以下 XML 文档：

<?xml version="1.0"?>
<Msg ns:attr="test_value" xmlns:ns="test.uri">Welcome to Tutorialspoint</Msg>