方法一:正则表达式法
实例代码如下:
$str = '';
preg_match('/^ var_dump($m); 运行结果: array(3) { [0]=> string(37) "" [1]=> string(1) """ [2]=> string(4) "http://www.manongjc.com" } 代码如下: $dom = new DOMDocument; $dom->loadHTML($html); foreach ($dom->getElementsByTagName('a') as $node) { echo $dom->saveHtml($node),PHP_EOL; } echo $node->nodeValue; echo $node->hasAttribute( 'href' ); echo $node->getAttribute( 'href' ); $node->setAttribute('href','something else'); $node->removeAttribute('href'); 方法二:使用XPath 实现代码如下: $dom = new DOMDocument; $dom->loadHTML($html); $xpath = new DOMXPath($dom); $nodes = $xpath->query('//a/@href'); foreach($nodes as $href) { echo $href->nodeValue; // echo current attribute value $href->nodeValue = 'new value'; // set new attribute value $href->parentNode->removeAttribute('href'); // remove attribute }