(PHP 5 >= 5.3.0)
DOMNode::getLineNo — Get line number for a node
Gets line number for where the node is defined.
此函数没有参数。
Always returns the line number where the node was defined in.
Example #1 DOMNode::getLineNo() example
<?php
// XML dump for below example
$xml = <<<XML
<?xml version="1.0" encoding="utf-8"?>
<root>
<node />
</root>
XML;
// Create a new DOMDocument instance
$dom = new DOMDocument;
// Load the XML
$dom->loadXML($xml);
// Print where the line where the 'node' element was defined in
printf('The <node> tag is defined on line %d', $dom->getElementsByTagName('node')->item(0)->getLineNo());
?>
以上例程会输出：
The <node> tag is defined in line 3
Anonymous (2012-05-19 14:21:06)
The DOMNode::getLineNo() method doesn't work properly due to a libxml2 bug.
https://bugzilla.gnome.org/show_bug.cgi?id=676026
luke dot NOREPLY at webconnex dot com (2011-03-04 18:28:52)
This function is buggy. It doesn't always return the correct line number, especially for text elements. As an alternative you can do something like this:
<?php
$text = $node->ownerDocument->saveXML($node);
$line += substr_count($text, "\n");
?>
You'll want to keep a reference to $line (starting at 0) and add to it as you parse over the document recursively.
In order for this to work you have to tell DOMDocument to preserve white space before loading the document.