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Error DOMDocument::loadhtml() [domdocument.loadhtML]: ID someAnchor already defined in EntITy,line: 9
我无法理解为什么.这是一些将HTML字符串加载到DOM中的代码.
希望您能够将其剪切并粘贴到脚本中并运行它以查看相同的输出：
<?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; }
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
那么,为什么DOM说someAnchor已经被定义了？
更新：
我试验了两者
>而不是使用loadHTML()我使用了loadXML()方法 – 并修复了它
>而不是同时使用id和名称我只使用了id – Attribute并修复了它.
为完成起见,请参阅此处的比较脚本：
<?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,$errline) { if ($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);
DOMDocument::loadXML(),而不是
DOMDocument::loadHTML().
在HTML中,name和id都引入了ID.所以你重复id“someAnchor”,因此错误.
但是,W3C验证器允许以您显示的形式重复ID< a id =“someAnchor”name =“someAnchor”>< / a>.这可能是libmxl2的错误.
在这个bug report for libxml2中,用户建议修补程序仅将name属性视为ID：
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