PHP XMLWriter startComment()用法及代碼示例

XMLWriter::startComment()函數是PHP中的內置函數，用於啟動注釋。稍後需要使用XMLWriter::endComment()函數關閉此注釋。

用法:

bool XMLWriter::startComment( void )

參數：此函數不接受任何參數。

返回值：如果成功，此函數將返回TRUE，否則將返回FALSE。

以下示例說明了PHP中的XMLWriter::startComment()函數：

範例1：

<?php 
  
// Create a new XMLWriter instance 
$writer = new XMLWriter(); 
  
// Create the output stream as PHP 
$writer->openURI('php://output'); 
  
// Start the document 
$writer->startDocument('1.0', 'UTF-8'); 
  
// Start a element 
$writer->startElement('div'); 
  
// Start a comment 
$writer->startComment(); 
  
// Add text to the comment 
$writer->text('This is a comment'); 
  
// End the comment 
$writer->endComment(); 
  
// End the element 
$writer->endElement(); 
  
// End the document 
$writer->endDocument(); 
?>

輸出：

<?xml version="1.0" encoding="UTF-8"?>
<div><!--This is a comment--></div>

程序2:

<?php 
  
// Create a new XMLWriter instance 
$writer = new XMLWriter(); 
  
// Create the output stream as PHP 
$writer->openURI('php://output'); 
  
// Start the document 
$writer->startDocument('1.0', 'UTF-8'); 
  
// Start a element 
$writer->startElement('div'); 
  
// Start a comment 
$writer->startComment(); 
  
// Add text to the comment which will not be visible 
$writer->text('This will not be visible.'); 
  
// End the comment 
$writer->endComment(); 
  
// Add value to the element 
$writer->text('This is the visible text.'); 
  
// End the element 
$writer->endElement(); 
  
// End the document 
$writer->endDocument(); 
?>

輸出：

<?xml version="1.0" encoding="UTF-8"?>
<div><!--This will not be visible.-->
This is the visible text.</div>

參考： https://www.php.net/manual/en/function.xmlwriter-start-comment.php

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