DOMNode::getLineNo

(PHP 5 >= 5.3.0)

DOMNode::getLineNoGet line number for a node

Description

public int DOMNode::getLineNo ( void )

Gets line number for where the node is defined.

Parameters

This function has no parameters.

Return Values

Always returns the line number where the node was defined in.

Examples

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());
?>

The above example will output:

The <node> tag is defined in line 3

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User Contributed Notes 3 notes

up
0
ruud at vanmelick dot com
8 months ago
The 65535 line number limit is no longer a problem when you use libxml 2.9 or higher, but you have to explicitly enable support for big line numbers:

<?php
define
('XML_PARSE_BIG_LINES', 4194304);
$dom = new DOMDocument;
$dom->loadXML($xml, XML_PARSE_BIG_LINES);
?>
up
0
Anonymous
2 years ago
The DOMNode::getLineNo() method doesn't work properly due to a libxml2 bug.

https://bugzilla.gnome.org/show_bug.cgi?id=676026
up
0
luke dot NOREPLY at webconnex dot com
3 years ago
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.
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