PHP - xmlwriter_start_element_ns() 函式

定義和用法

XML 是一種用於在網路上共享資料的標記語言，XML 既可供人類閱讀，也可供機器閱讀。XMLWriter 擴充套件內部包含 libxml xmlWriter API，用於編寫/建立 XML 文件的內容。由此生成的 XML 文件是非快取的且僅向前。

xmlwriter_start_element_ns() 函式接受 XMLWriter 類的物件、三個分別表示名稱空間字首、元素名稱和名稱空間 URI 的字串值作為引數，並建立一個元素起始標籤。

語法

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

引數

返回值

此函式返回一個布林值，成功時為 TRUE，失敗時為 FALSE。

PHP 版本

此函式首次引入 PHP 5 版本，並在所有後續版本中均有效。

示例

以下示例演示了 xmlwriter_start_element_ns() 函式的用法：

<?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);

   //Creating XML elements
   xmlwriter_set_indent($writer,TRUE);
   xmlwriter_set_indent_string($writer, "    ");

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

   //Starting a namespaced element tag
   xmlwriter_start_element_ns($writer, 'ns', 'name', 'test.uri');

   //Adding text to the element
   xmlwriter_text($writer, 'sample_data');  
   xmlwriter_end_element($writer);

   //Ending the element
   xmlwriter_end_element($writer);

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

這將生成以下 XML 文件：

<?xml version="1.0"?>
<Tutorial>
   <ns:name xmlns:ns="test.uri">JavaFX</ns:name>
   <Author>Krishna</Author>
   <Pages>535</Pages>
</Tutorial>

示例

以下是此函式在面向物件風格中的示例：

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

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

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

   //Creating XML elements
   $writer->setIndent(TRUE);
   $writer->setIndentString("    ");

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

   //Starting a namespaced element tag
   $writer->startElementNs('ns', 'name', 'test.uri');

   //Adding text to the element
   $writer->text('sample_data');  
   $writer->endElement();

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

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

這將生成以下 XML 文件：

<?xml version="1.0"?>
<Data>
   <ns:name xmlns:ns="test.uri">sample_data</ns:name>
</Data>