DOMElement::getElementsByTagName

(PHP 5, PHP 7, PHP 8)

DOMElement::getElementsByTagName — Gets elements by tagname

说明

public DOMElement::getElementsByTagName(string $qualifiedName): DOMNodeList

This function returns a new instance of the class DOMNodeList of all descendant elements with a given tag qualifiedName, in the order in which they are encountered in a preorder traversal of this element tree.

参数

qualifiedName: The tag name. Use * to return all elements within the element tree.

返回值

This function returns a new instance of the class DOMNodeList of all matched elements.

参见

DOMElement::getElementsByTagNameNS() - Get elements by namespaceURI and localName

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User Contributed Notes 3 notes

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rudiger at greatdealsenterprises dot com ¶

3 years ago


Note that even though getElementsByTagName returns a NodeList which is defined as a list of DOMNodes, you're actually getting a list of DOMElements. That allows to call getElementsByTagName on each of the results.

$tables = $doc->getElementsByTagName('table');
foreach ($tables as $table) {
  $trs = $table->getElementsByTagName('tr');
  // etc...
}

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Brennon Brimhall ¶

5 years ago


Be aware that this function returns all descendants, not just immediate children.

down

-58

ddkkdd twenty twenty at gmail dot com ¶

11 years ago


A simple function that uses this method to print the nodes it finds in an xml document. Improvements welcomed.


<?php

function printTags($tag){


  $node = $this->doc->getElementsByTagName($tag);           

   for($c = 0; $c<$node->length; $c++){

     $text[$c] =$this->doc->saveXML($node->item($c));

     echo $text[$c];


   }


  

}

?>

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官方地址：https://www.php.net/manual/en/domelement.getelementsbytagname.php

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DOMElement::getElementsByTagName

说明

参数

返回值

参见

User Contributed Notes 3 notes