DOMDocument::createComment

(PHP 5, PHP 7, PHP 8)

DOMDocument::createComment — Create new comment node

说明

public DOMDocument::createComment ( string $data ) : DOMComment|false

This function creates a new instance of class DOMComment. 此节点出现在文档中，除非是用诸如 DOMNode->appendChild() 等函数来将其插入。

参数

data

The content of the comment.

返回值

The new DOMComment or false if an error occurred.

参见

User Contributed Notes

php dot sirlancelot at spamgourmet dot com 25-Nov-2009 12:10
To prevent a parser error when the comment string would contain the character sequence "--", do this:

<?php

$CommentString = 'This contains -- some weird -- characters.';

$CommentNode = $DomDocument->createComment(
        str_replace('--', '-'.chr(194).chr(173).'-', $CommentString)
);
?>

This will insert a Soft Hyphen in between the two hyphens which will not cause the parser to error out.
capps at solareclipse dot net 29-Mar-2007 03:55
Use caution: this function does NOT escape, encode, or otherwise change the contents of the string.

This means that if your string contains two hyphens in a row (--), that will *end* the comment, which can easily create invalid XML when the document is serialized.