PHP xpath提取网页数据内容代码解析_php实例_

 /** * 初始化DOMXpath对象 * * @param [type] $content 网页内容 * @param [array] $pathinfo 匹配信息 * * @return void */ private function _createXpathObj($content, $patinfo) { // 如果没有xpath配置项，不初始化xpath if (!$this->_existsXpathParse($patinfo)) { return; } try { $dom = new \DOMDocument(); @$dom->loadHtml($content); $dom->normalize(); $xpath = new \DOMXpath($dom); $this->xpathObj = $xpath; } catch (\Exception $e) { getService('logger')->warning('Parse html fail', ['content' => $content]); } }

 /** * 获取Xpath解析值 * * @param [type] $pat 匹配模式 * * @return string */ private function _getXpathField($pat) { $objs = $this->xpathObj->query($pat); if ($objs->length > 0) { $node = $objs->item(0); $outerHTML = $node->ownerDocument->saveHTML($node); return trim($outerHTML); # 作为示例 输出innerhtml //$innerHTML = ''; //foreach ($node->childNodes as $childNode){ // $innerHTML .= $childNode->ownerDocument->saveHTML($childNode); //} //return $innerHTML; # 作为示例 输出文本不含标签 //return $node->textContent; //$node->nodeValue; } return ''; }

loadHTML('
p1
p2
'); $node = $dom->getElementsByTagName('div')->item(0); $outerHTML = $node->ownerDocument->saveHTML($node); $innerHTML = ''; foreach ($node->childNodes as $childNode){ $innerHTML .= $childNode->ownerDocument->saveHTML($childNode); } echo '
outerHTML: 
'; echo htmlspecialchars($outerHTML); echo '
innerHTML: 
'; echo htmlspecialchars($innerHTML); ?>