PHP - xmlwriter_start_element() 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。由此生成的 XML 文档是非缓存的且是单向的。

xmlwriter_start_element() 函数接受 XMLWriter 类的对象，并创建一个元素起始标签。

语法

xmlwriter_start_element($writer, $name);

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_element() 函数的用法：

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

   //Opening a writer
   $uri = "result.xml";
   $writer = xmlwriter_open_uri($uri);

   //Starting the document
   xmlwriter_start_document($writer);

   //Starting an element
   xmlwriter_start_element($writer, 'Tutorial');
   xmlwriter_start_element($writer, 'name');
   
   //Adding text to the element
   xmlwriter_text($writer, 'JavaFX');  
   xmlwriter_end_element($writer);
   xmlwriter_start_element($writer, 'Author');
   
   //Adding text to the element
   xmlwriter_text($writer, 'Krishna');  
   xmlwriter_end_element($writer);
   xmlwriter_start_element($writer, 'Pages');
   
   //Adding text to the element
   xmlwriter_text($writer, '535');  
   xmlwriter_end_element($writer);

   //Ending the element
   xmlwriter_end_element($writer);

   //Ending the document
   xmlwriter_end_document($writer);
   print("XML Document Created");
?> 

这将生成以下 XML 文档：

<?xml version="1.0"?>
<Tutorial>
   <name>JavaFX</name>
   <Author>Krishna</Author>
   <Pages>535</Pages>
</Tutorial> 

示例

以下是此函数的面向对象风格示例：

<?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('Tutorial');
   $writer->startElement('name');
   $writer->text('JavaFX');  
   $writer->endElement();
   $writer->startElement('Author');
   $writer->text('Krishna');  
   $writer->endElement();
   $writer->startElement('Pages');
   $writer->text('535');  
   $writer->endElement();

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

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

这将生成以下 XML 文档：

<?xml version="1.0"?>
<Tutorial>
   <name>JavaFX</name>
   <Author>Krishna</Author>
   <Pages>535</Pages>
</Tutorial>