PHP - xmlwriter_set_indent() 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，也可供機器讀取。XMLWriter 擴充套件內部具有 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_set_indent() 函式接受 XMLWriter 類的物件和布林值作為引數，並根據傳遞的布林值設定輸出 XML 文件的縮排開啟/關閉。

語法

xmlwriter_set_indent($writer, $indentation);

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

此函式首次引入於 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_set_indent() 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);

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

   //Setting indentation
   xmlwriter_set_indent($writer,TRUE);
   xmlwriter_set_indent_string($writer, "    ");
   
   //Creating XML elements
   xmlwriter_write_element($writer, 'name', 'JavaFX');  
   xmlwriter_write_element($writer, 'author', 'Krishna');  
   xmlwriter_write_element($writer, 'pages', '535');  

   //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>
   <Name>JavaFX</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();
   $uri = "result.xml";

   //Opening a writer
   $writer->openUri($uri);

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

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

   //Setting indentation
   $writer->setIndent(TRUE);
   $writer->setIndentString("    ");
   
   //Creating XML elements
   $writer->writeElement('Name', 'JavaFX');  
   $writer->writeElement('Author', 'Krishna'); 
   $writer->writeElement('Pages', '535');  

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

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

這將生成以下 XML 文件：

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