Error DOM - ID 'someAnchor' ya definido en la Entidad, línea X
Si trato de cargar un documento HTML en PHP DOM, aparece un error en la línea de:
Error DOMDocument::loadHTML() [domdocument.loadhtml]: ID someAnchor already defined in Entity, line: 9
No puedo entender por qué. Aquí hay un código que carga una cadena HTML en DOM.
Primero sin contener una etiqueta de anclaje y segundo con uno. El segundo documento produce un error.
Esperemos que pueda cortarlo y pegarlo en un script y ejecutarlo para ver el mismo resultado:
<?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;
}
Me sale lo siguiente en mi vista de código fuente de Firefox:
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
Entonces, ¿por qué DOM dice que someAnchor ya está definido?
Actualizar:
Experimenté con ambos
En lugar de usar loadHTML (), utilicé el método loadXML (), y eso lo solucionóEn lugar de tener tanto la identificación como el nombre, usé solo la identificación: atributo y eso lo solucionó.Vea la secuencia de comandos de comparación aquí para completar:
<?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);