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最近采集写的一个超简单实用的HTML解析类

时间：2021-07-01 10:21:17 帮助过：10人阅读

$xp = new xf_HtmlDom(); $xp->loadHtml('http://dealer.bitauto.com/100040078/cars.html'); $rows = $xp->find('dl/dd/a', 0)->innertext; print_r($rows);
  1. $oldSetting = libxml_use_internal_errors( true );
  2. libxml_clear_errors();
  3. /**
  4. *
  5. * -+-----------------------------------
  6. * |PHP5 Framework - 2011
  7. * |Web Site: www.iblue.cc
  8. * |E-mail: mejinke@gmail.com
  9. * |Date: 2012-10-12
  10. * -+-----------------------------------
  11. *
  12. * @desc HTML解析器
  13. * @author jingke
  14. */
  15. class XF_HtmlDom
  16. {
  17. private $_xpath = null;
  18. private $_nodePath = '';
  20. public function __construct($xpath = null, $nodePath = '')
  21. {
  22. $this->_xpath = $xpath;
  23. $this->_nodePath = $nodePath;
  24. }
  26. public function loadHtml($url)
  27. {
  28. ini_set('user_agent', 'Mozilla/5.0 (Linux; U; Android 2.1; en-us; Nexus One Build/ERD62) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17 –Nexus');
  29. $content = '';
  30. if(strpos(strtolower($url), 'http')===false)
  31. {
  32. $content = file_get_contents($url);
  33. }
  34. else
  35. {
  36. $ch = curl_init();
  37. $user_agent = "Baiduspider+(+http://www.baidu.com/search/spider.htm)";
  38. $user_agent1='Mozilla/5.0 (Windows NT 5.1; rv:6.0) Gecko/20100101 Firefox/6.0';
  39. curl_setopt($ch, CURLOPT_URL, $url);
  40. curl_setopt($ch, CURLOPT_HEADER, false);
  41. curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  42. curl_setopt($ch, CURLOPT_REFERER, $url);
  43. curl_setopt($ch, CURLOPT_USERAGENT, $user_agent1);
  44. curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);
  45. $content =curl_exec($ch);
  46. curl_close($ch);
  47. }
  49. $html = new DOMDocument();
  50. $html->loadHtml($content);
  51. $this->_xpath = new DOMXPath( $html );
  52. return $this;
  54. }
  56. public function find($query, $index = null)
  57. {
  58. if($this->_nodePath == '')
  59. $this->_nodePath = '//';
  60. else
  61. $this->_nodePath .= '/';
  63. $nodes = $this->_xpath->query($this->_nodePath.$query);
  64. if ($index == null && !is_numeric($index))
  65. {
  66. $tmp = array();
  67. foreach ($nodes as $node)
  68. {
  69. $tmp[] = new XF_HtmlDom($this->_xpath, $node->getNodePath());
  70. }
  71. return $tmp;
  72. }
  73. return new XF_HtmlDom($this->_xpath,$this->_xpath->query($this->_nodePath.$query)->item($index)->getNodePath());
  74. }
  76. /**
  77. * 获取内容
  78. */
  79. public function text()
  80. {
  81. if ($this->_nodePath != '' && $this->_xpath != null )
  82. return $this->_xpath->query($this->_nodePath)->item(0)->textContent;
  83. else
  84. return false;
  85. }
  87. /**
  88. * 获取属性值
  89. */
  90. public function getAttribute($name)
  91. {
  92. if ($this->_nodePath != '' && $this->_xpath != null )
  93. return $this->_xpath->query($this->_nodePath)->item(0)->getAttribute($name);
  94. else
  95. return false;
  96. }
  98. public function __get($name)
  99. {
  100. if($name == 'innertext')
  101. return $this->text();
  102. else
  103. return $this->getAttribute($name);
  104. }
  106. }

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