DOMElement::getElementsByTagName()函數是PHP中的內置函數,用於通過標記名獲取元素。
用法:
DOMNodeList DOMElement::getElementsByTagName( string $name )
參數:該函數接受單個參數$name,該參數保存標簽名稱或使用*來獲取所有標簽。
返回值:此函數返回一個DOMNodeList值,該值包含具有給定標記名稱的所有後代元素,按照在此元素樹的預遍曆中遇到它們的順序。
以下示例說明了PHP中的DOMElement::getElementsByTagName()函數:
範例1:
<?php
// Create a new DOMDocument
$dom = new DOMDocument();
// Load the XML
$dom->loadXML("<?xml version=\"1.0\"?>
<root>
<body>
<div>
<h1 style=\"color:red;\"> Hello, this is my red heading. </h1>
<h1 style=\"color:green;\"> Hello, this is my green heading. </h1>
<h1 style=\"color:blue;\"> Hello, this is my blue heading. </h1>
</div>
</body>
</root>");
// Save the XML
$nodeList = $dom->getElementsByTagName('h1');
foreach ($nodeList as $node) {
// Get the attribute value of style
echo $node->getAttribute('style') . '<br>';
}
?>
輸出:
color:red; color:green; color:blue;
範例2:
<?php
// Create a new DOMDocument
$dom = new DOMDocument();
// Load the XML
$dom->loadXML("<?xml version=\"1.0\"?>
<root>
<body>
<div>
<p> Hello, this is my first paragraph. </p>
<p> Hello, this is my second paragraph. </p>
<p> Hello, this is my third paragraph. </p>
</div>
</body>
</root>");
// Get the element by tagname
$nodeList = $dom->getElementsByTagName('p');
foreach ($nodeList as $node) {
// Get the textContent
echo $node->textContent . '<br>';
}
?>
輸出:
Hello, this is my first paragraph. Hello, this is my second paragraph. Hello, this is my third paragraph.
參考: https://www.php.net/manual/en/domelement.getelementsbytagname.php
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注:本文由純淨天空篩選整理自gurrrung大神的英文原創作品 PHP | DOMElement getElementsByTagName() Function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。