PHP - xmlwriter_set_indent_string() 函式

定義和用法

XML 是一種標記語言，用於在網路上傳輸資料，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，並且是單向的。

xmlwriter_set_indent_string() 函式接受 XMLWriter 類的物件和一個表示用作縮排的字串作為引數，並相應地設定輸出 XML 文件的縮排。

xmlwriter_set_indent($writer, $indentStr);

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

此函式首次在 PHP 5 版本中引入，並在所有更高版本中均有效。

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

以下是此函式面向物件風格的示例 −

<?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>