DOMElement::getElementsByTagName
(PHP 5, PHP 7, PHP 8)
DOMElement::getElementsByTagName — Gets elements by tagname
说明
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.
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User Contributed Notes 3 notes
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 = $table->getElementsByTagName('tr');
// etc...
}
Brennon Brimhall ¶
5 years ago
Be aware that this function returns all descendants, not just immediate children.
ddkkdd twenty twenty at gmail dot com ¶
11 years ago
A simple function that uses this method to print the nodes it finds in an xml document. Improvements welcomed.
<?php
function printTags($tag){
$node = $this->doc->getElementsByTagName($tag);
for($c = 0; $c<$node->length; $c++){
$text[$c] =$this->doc->saveXML($node->item($c));
echo $text[$c];
}
}
?>
备份地址：http://www.lvesu.com/blog/php/domelement.getelementsbytagname.php