If I try to load an HTML document into PHP DOM I get an error along the lines of:
Error DOMDocument::loadHTML() [domdocument.loadhtml]: ID someAnchor already defined in Entity, line: 9
I cannot work out why. Here is some code that loads an HTML string into DOM.
First without containing an anchor tag and second with one. The second document produces an error.
Hopefully you should be able to cut and paste it into a script and run it to see the same output:
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
$stringWithNoAnchor = <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>My document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body >
<h1>Hello</h1>
</body>
</html>
EOT;
$stringWithAnchor = <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>My document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body >
<h1>Hello</h1>
<a name="someAnchor" id="someAnchor"></a>
</body>
</html>
EOT;
class domGrabber
{
public $_FileErrorStr = '';
/**
*#desc DOM object factory does the work of loading the DOM object
*/
public function getLoadAsDOMObj($htmlString)
{
$this->_FileErrorStr =''; //reset error container
$xmlDoc = new DOMDocument();
set_error_handler(array($this, '_FileErrorHandler')); // Warnings and errors are suppressed
$xmlDoc->loadHTML($htmlString);
restore_error_handler();
return $xmlDoc;
}
/**
*#desc public so that it can catch errors from outside this class
*/
public function _FileErrorHandler($errno, $errstr, $errfile, $errline)
{
if ($this->_FileErrorStr === null)
{
$this->_FileErrorStr = $errstr;
}
else {
$this->_FileErrorStr .= (PHP_EOL . $errstr);
}
}
}
$domGrabber = new domGrabber();
$xmlDoc = $domGrabber->getLoadAsDOMObj($stringWithNoAnchor );
echo 'PHP Version: '. phpversion() .'<br />'."\n";
echo '<pre>';
print $xmlDoc->saveXML();
echo '</pre>'."\n";
if ($domGrabber->_FileErrorStr)
{
echo 'Error'. $domGrabber->_FileErrorStr;
}
$xmlDoc = $domGrabber->getLoadAsDOMObj($stringWithAnchor);
echo '<pre>';
print $xmlDoc->saveXML();
echo '</pre>'."\n";
if ($domGrabber->_FileErrorStr)
{
echo 'Error'. $domGrabber->_FileErrorStr;
}
I get the following out put in my Firefox source code view:
PHP Version: 5.2.9<br />
<pre><?xml version="1.0" encoding="iso-8859-1" standalone="yes"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml"><head><title>My document</title><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /></head><body>
<h1>Hello</h1>
</body></html>
</pre>
<pre><?xml version="1.0" encoding="iso-8859-1" standalone="yes"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml"><head><title>My document</title><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /></head><body>
<h1>Hello</h1>
<a name="someAnchor" id="someAnchor"></a>
</body></html>
</pre>
Error
DOMDocument::loadHTML() [<a href='domdocument.loadhtml'>domdocument.loadhtml</a>]: ID someAnchor already defined in Entity, line: 9
So, why is DOM saying that someAnchor is already defined?
Update:
I experimented with both
Instead of using loadHTML() I used the loadXML() method - and that fixed it
Instead of having both id and name I used just id - Attribute and that fixed it.
See the comparison script here for the sake of completion:
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
$stringWithNoAnchor = <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>My document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body >
<p>stringWithNoAnchor</p>
</body>
</html>
EOT;
$stringWithAnchor = <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>My document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body >
<p>stringWithAnchor</p>
<a name="someAnchor" id="someAnchor" ></a>
</body>
</html>
EOT;
$stringWithAnchorButOnlyIdAtt = <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>My document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body >
<p>stringWithAnchorButOnlyIdAtt</p>
<a id="someAnchor"></a>
</body>
</html>
EOT;
class domGrabber
{
public $_FileErrorStr = '';
public $useHTMLMethod = TRUE;
/**
*#desc DOM object factory does the work of loading the DOM object
*/
public function loadDOMObjAndWriteOut($htmlString)
{
$this->_FileErrorStr ='';
$xmlDoc = new DOMDocument();
set_error_handler(array($this, '_FileErrorHandler')); // Warnings and errors are suppressed
if ($this->useHTMLMethod)
{
$xmlDoc->loadHTML($htmlString);
}
else {
$xmlDoc->loadXML($htmlString);
}
restore_error_handler();
echo "<h1>";
echo ($this->useHTMLMethod) ? 'using xmlDoc->loadHTML() ' : 'using $xmlDoc->loadXML()';
echo "</h1>";
echo '<pre>';
print $xmlDoc->saveXML();
echo '</pre>'."\n";
if ($this->_FileErrorStr)
{
echo 'Error'. $this->_FileErrorStr;
}
}
/**
*#desc public so that it can catch errors from outside this class
*/
public function _FileErrorHandler($errno, $errstr, $errfile, $errline)
{
if ($this->_FileErrorStr === null)
{
$this->_FileErrorStr = $errstr;
}
else {
$this->_FileErrorStr .= (PHP_EOL . $errstr);
}
}
}
$domGrabber = new domGrabber();
echo 'PHP Version: '. phpversion() .'<br />'."\n";
$domGrabber->useHTMLMethod = TRUE; //DOM->loadHTML
$domGrabber->loadDOMObjAndWriteOut($stringWithNoAnchor);
$domGrabber->loadDOMObjAndWriteOut($stringWithAnchor );
$domGrabber->loadDOMObjAndWriteOut($stringWithAnchorButOnlyIdAtt);
$domGrabber->useHTMLMethod = FALSE; //use DOM->loadXML
$domGrabber->loadDOMObjAndWriteOut($stringWithNoAnchor);
$domGrabber->loadDOMObjAndWriteOut($stringWithAnchor );
$domGrabber->loadDOMObjAndWriteOut($stringWithAnchorButOnlyIdAtt);
If you are loading XML files (that's the case, XHTML is XML), then you should use DOMDocument::loadXML(), not DOMDocument::loadHTML().
In HTML, both name and id introduce an ID. So you are repeating the id "someAnchor", hence the error.
However, the W3C validator allows repeated IDs in the form you show <a id="someAnchor" name="someAnchor"></a>. This may be a bug of libmxl2.
In this bug report for libxml2, a user proposes a patch to only consider the name attribute as an ID:
According to the HTML and XHTML specs, only the a element's name attribute
shares name space with id attributes. For some of the elements it can be argued
that multiple instances with the same name don't make sense, but they should
nevertheless not be considered in the same namespace as other elements' id
attributes.
See http://www.zvon.org/xxl/xhtmlReference/Output/Strict/attr_name.html for all
the elements that take name attributes and their semantics.
Related
Question:
How do I avoid that DOMDocument creates initial xml-tag?:
<?xml version="1.0"?>
Wanted code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>My site</title>
</head>
<body>
</body>
</html>
Produced code using DOMDocument:
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>My site</title>
</head>
<body></body>
</html>
My script:
<?php
/**
* Ref:
* https://stackoverflow.com/questions/19482826/using-domdocument-to-create-elements-in-an-html-file
* https://www.php.net/manual/en/domimplementation.createdocumenttype.php
*/
// Creates an instance of the DOMImplementation class
$imp = new DOMImplementation;
// Doctype
$dtd = $imp->createDocumentType(
'html', '-//W3C//DTD XHTML 1.0 Transitional//EN', 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'
);
// Base document
$doc = $imp->createDocument("", "", $dtd);
$doc->formatOutput = true;
/**
* Construct tag skeleton.
*/
// [L-1]
$html=$doc->appendChild(
$doc->createElementNS("http://www.w3.org/1999/xhtml","html")
);
$html->setAttribute("lang", "en");
$html->setAttribute("xml:lang", "en");
$doc->appendChild($html);
// [L-2]
$head=$html->appendChild(
$doc->createElement('head')
);
// [L-3]
$title=$head->appendChild(
$doc->createElement(
'title',
"My site"
)
);
// [L-2]
$body=$html->appendChild(
$doc->createElement('body')
);
// Save
echo $doc->saveHTML();
$doc->save("auto_produced_xhtml.xhtml");
You can use saveHTMLFile(); instead of save() to ... save as HTML file. Replace
$doc->save("auto_produced_xhtml.xhtml");
with
$doc->saveHTMLFile("auto_produced_xhtml.xhtml");
https://www.php.net/manual/en/domdocument.savehtmlfile.php
i have try this code
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org /TR/xhtml1/DTD/xhtml1-transitional.dtd">
<?php phpinfo(); die; ?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>TRY IT</title>
</head>
<body>
<?php
echo "test";
?>
</body>
</html>
It is very simple echo syntax in php. Output that should i got is string "test" on my screen. but output that i got just a blank page.
For your information php version that installed on my computer is version 5.3.8
anyone know what happen?
Remove the die on the second line.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org /TR/xhtml1/DTD/xhtml1-transitional.dtd">
<?php phpinfo(); die; ?>
^^^^ Remove this
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>TRY IT</title>
</head>
<body>
<?php
echo "test";
?>
</body>
</html>
Why I am not able to end a javascript inside a PHP heredoc?
The rest of the code below this line:
</script>
become not part of PHP's code. They become HTML code.
It is like the end script code ends the PHP block.
$headerContent = <<<HEAD
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
<head>
<title>$title</title>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-2" />
<script>
</script> // Here is the problem
</head> // code here and below becomes not part of PHP.
<body>
.
.
.
HEAD;
Any tips for solving this problem?
Although I can't reproduce this with HEREDOC (it's possible that different versions of PHP behave differently in this respect), </script> is equivalent to ?> in PHP code, because it's a counterpart to <script language="php">. Example:
<script language="php"> $a = 1; </script>
Test: <?= $a ?>
So wherever you encounter problems with the ?> closing tag, you'll also encounter the same problems with the </script> closing tag. One option would be to store this in a variable and use it. Example:
<?php
$endScript = '</' . 'script>';
$headerContent = <<<HEAD
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
<head>
<title>$title</title>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-2" />
<script>
$endScript
</head>
<body>
.
.
.
HEAD;
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html lang="en" dir="ltr" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="description" content="Players of Liverpool F.C." />
<meta name="keywords" content="liverpool, players of liverpool" />
<title>Players of Liverpool F.C.</title>
</head>
<body>
<?php
$dom = new DOMDocument();
$dom->loadHTMLFile('http://en.wikipedia.org/wiki/Liverpool_F.C.');
$domxpath = new DOMXPath($dom);
foreach ($domxpath->query('//span[#id="Players"]/../following-sibling::table[1]//span[#class="fn"]') as $a)
{echo
"
<p>$a->textContent</p>
";
};
?>
</body>
</html>
Hello, how can I parse an XML that includes all of the $a->textContent with a tag like <player></player>?
You had misspelled the address for the wikipedia-article. Furthermore, you should put
<?xml version="1.0" encoding="UTF-8" ?>
as the beginning at generally make your xml welformed:
<?php
$dom = new DOMDocument();
$dom->loadHTMLFile('https://secure.wikimedia.org/wikipedia/en/wiki/Liverpool_fc');
$domxpath = new DOMXPath($dom);
echo "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n";
echo "\t<players>\n";
foreach ($domxpath->query('//span[#id="Players"]/../following-sibling::table[1]//span[#class="fn"]') as $a)
{
echo "\t\t<player>$a->textContent</player>\n";
};
echo "\t</players>";
?>
This output a nice xml-list of players:
http://gregersboye.dk/test.php
(you might need to look at the sourcecode, firefox doesn't display it nice as is)
If I try to load an HTML document into PHP DOM I get an error along the lines of:
Error DOMDocument::loadHTML() [domdocument.loadhtml]: ID someAnchor already defined in Entity, line: 9
I cannot work out why. Here is some code that loads an HTML string into DOM.
First without containing an anchor tag and second with one. The second document produces an error.
Hopefully you should be able to cut and paste it into a script and run it to see the same output:
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
$stringWithNoAnchor = <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>My document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body >
<h1>Hello</h1>
</body>
</html>
EOT;
$stringWithAnchor = <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>My document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body >
<h1>Hello</h1>
<a name="someAnchor" id="someAnchor"></a>
</body>
</html>
EOT;
class domGrabber
{
public $_FileErrorStr = '';
/**
*#desc DOM object factory does the work of loading the DOM object
*/
public function getLoadAsDOMObj($htmlString)
{
$this->_FileErrorStr =''; //reset error container
$xmlDoc = new DOMDocument();
set_error_handler(array($this, '_FileErrorHandler')); // Warnings and errors are suppressed
$xmlDoc->loadHTML($htmlString);
restore_error_handler();
return $xmlDoc;
}
/**
*#desc public so that it can catch errors from outside this class
*/
public function _FileErrorHandler($errno, $errstr, $errfile, $errline)
{
if ($this->_FileErrorStr === null)
{
$this->_FileErrorStr = $errstr;
}
else {
$this->_FileErrorStr .= (PHP_EOL . $errstr);
}
}
}
$domGrabber = new domGrabber();
$xmlDoc = $domGrabber->getLoadAsDOMObj($stringWithNoAnchor );
echo 'PHP Version: '. phpversion() .'<br />'."\n";
echo '<pre>';
print $xmlDoc->saveXML();
echo '</pre>'."\n";
if ($domGrabber->_FileErrorStr)
{
echo 'Error'. $domGrabber->_FileErrorStr;
}
$xmlDoc = $domGrabber->getLoadAsDOMObj($stringWithAnchor);
echo '<pre>';
print $xmlDoc->saveXML();
echo '</pre>'."\n";
if ($domGrabber->_FileErrorStr)
{
echo 'Error'. $domGrabber->_FileErrorStr;
}
I get the following out put in my Firefox source code view:
PHP Version: 5.2.9<br />
<pre><?xml version="1.0" encoding="iso-8859-1" standalone="yes"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml"><head><title>My document</title><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /></head><body>
<h1>Hello</h1>
</body></html>
</pre>
<pre><?xml version="1.0" encoding="iso-8859-1" standalone="yes"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml"><head><title>My document</title><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /></head><body>
<h1>Hello</h1>
<a name="someAnchor" id="someAnchor"></a>
</body></html>
</pre>
Error
DOMDocument::loadHTML() [<a href='domdocument.loadhtml'>domdocument.loadhtml</a>]: ID someAnchor already defined in Entity, line: 9
So, why is DOM saying that someAnchor is already defined?
Update:
I experimented with both
Instead of using loadHTML() I used the loadXML() method - and that fixed it
Instead of having both id and name I used just id - Attribute and that fixed it.
See the comparison script here for the sake of completion:
<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
$stringWithNoAnchor = <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>My document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body >
<p>stringWithNoAnchor</p>
</body>
</html>
EOT;
$stringWithAnchor = <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>My document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body >
<p>stringWithAnchor</p>
<a name="someAnchor" id="someAnchor" ></a>
</body>
</html>
EOT;
$stringWithAnchorButOnlyIdAtt = <<<EOT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>My document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body >
<p>stringWithAnchorButOnlyIdAtt</p>
<a id="someAnchor"></a>
</body>
</html>
EOT;
class domGrabber
{
public $_FileErrorStr = '';
public $useHTMLMethod = TRUE;
/**
*#desc DOM object factory does the work of loading the DOM object
*/
public function loadDOMObjAndWriteOut($htmlString)
{
$this->_FileErrorStr ='';
$xmlDoc = new DOMDocument();
set_error_handler(array($this, '_FileErrorHandler')); // Warnings and errors are suppressed
if ($this->useHTMLMethod)
{
$xmlDoc->loadHTML($htmlString);
}
else {
$xmlDoc->loadXML($htmlString);
}
restore_error_handler();
echo "<h1>";
echo ($this->useHTMLMethod) ? 'using xmlDoc->loadHTML() ' : 'using $xmlDoc->loadXML()';
echo "</h1>";
echo '<pre>';
print $xmlDoc->saveXML();
echo '</pre>'."\n";
if ($this->_FileErrorStr)
{
echo 'Error'. $this->_FileErrorStr;
}
}
/**
*#desc public so that it can catch errors from outside this class
*/
public function _FileErrorHandler($errno, $errstr, $errfile, $errline)
{
if ($this->_FileErrorStr === null)
{
$this->_FileErrorStr = $errstr;
}
else {
$this->_FileErrorStr .= (PHP_EOL . $errstr);
}
}
}
$domGrabber = new domGrabber();
echo 'PHP Version: '. phpversion() .'<br />'."\n";
$domGrabber->useHTMLMethod = TRUE; //DOM->loadHTML
$domGrabber->loadDOMObjAndWriteOut($stringWithNoAnchor);
$domGrabber->loadDOMObjAndWriteOut($stringWithAnchor );
$domGrabber->loadDOMObjAndWriteOut($stringWithAnchorButOnlyIdAtt);
$domGrabber->useHTMLMethod = FALSE; //use DOM->loadXML
$domGrabber->loadDOMObjAndWriteOut($stringWithNoAnchor);
$domGrabber->loadDOMObjAndWriteOut($stringWithAnchor );
$domGrabber->loadDOMObjAndWriteOut($stringWithAnchorButOnlyIdAtt);
If you are loading XML files (that's the case, XHTML is XML), then you should use DOMDocument::loadXML(), not DOMDocument::loadHTML().
In HTML, both name and id introduce an ID. So you are repeating the id "someAnchor", hence the error.
However, the W3C validator allows repeated IDs in the form you show <a id="someAnchor" name="someAnchor"></a>. This may be a bug of libmxl2.
In this bug report for libxml2, a user proposes a patch to only consider the name attribute as an ID:
According to the HTML and XHTML specs, only the a element's name attribute
shares name space with id attributes. For some of the elements it can be argued
that multiple instances with the same name don't make sense, but they should
nevertheless not be considered in the same namespace as other elements' id
attributes.
See http://www.zvon.org/xxl/xhtmlReference/Output/Strict/attr_name.html for all
the elements that take name attributes and their semantics.