CascadiaPHP 2024


(PHP 5 >= 5.3.0, PHP 7, PHP 8)

DOMNode::getLineNoGet line number for a node


public DOMNode::getLineNo(): int

Gets line number for where the node was defined at parse time.


This function has no parameters.

Return Values

Returns the line number where the node was defined at parse time. If the node was created manually, the return value will be 0.


Example #1 DOMNode::getLineNo() example

// XML dump for below example
$xml = <<<XML
<?xml version="1.0" encoding="utf-8"?>
<node />

// Create a new DOMDocument instance
$dom = new DOMDocument;

// Load the 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

ruud at vanmelick dot com
10 years 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:

('XML_PARSE_BIG_LINES', 4194304);
$dom = new DOMDocument;
$dom->loadXML($xml, XML_PARSE_BIG_LINES);
luke dot NOREPLY at webconnex dot com
13 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:

= $node->ownerDocument->saveXML($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.
12 years ago
The DOMNode::getLineNo() method doesn't work properly due to a libxml2 bug.
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