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如何正确使用PHP DOM-XML创建XML文件

程序员文章站 2022-06-10 23:12:19
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我们在创建XML文件并对其进行解析时,通常都会用到

PHP DOM-XML的应用代码示例:

  1. ?php
  2. /**
  3. * Topic: Create and parse XML files using PHP DOM-XML
  4. * Source:http://www.php.net/domxml
  5. * Reference: http://www.zugeschaut-und-mitgebaut.de/php/extension.domxml.html
  6. * Author:urs@circle.ch, 16-1-2001
  7. *
  8. */
  9. // 使用PHP DOM-XML创建和解析XML文件
  10. //创建XML文档对象;以后的处理过程将在此基础上进行
  11. doc = new_xmldoc("1.0" );
  12. //创建根节点,并设置一个属性
  13. root = $doc->add_root("faq" );
  14. $root->setattr("page", "32" );
  15. //子节点
  16. one = $root->new_child("question", "");
  17. //为子节点设置属性
  18. $one->setattr("number", "1");
  19. //question也创建子节点,并且给它赋值
  20. $one->new_child("text", "1. Where to get libxml-2.0.0?");
  21. $one->new_child("answer", "You can download the latest
  22. release of libxml either as a source archive or
  23. RPM package from http://www.xmlsoft.org.
  24. The current version is libxml2-2.2.1." );
  25. two = $root->new_child("question", "" );
  26. $two->setattr("number", "2");
  27. $two->new_child("text", "2. How to configure PHP4?" );
  28. // 创建一个不直接赋值的节点
  29. twoone = $two->new_child("answer", "");
  30. // 然后给它单独赋值
  31. $twoone->set_content("DIR is the libxml install directory
  32. (if you just use --with-dom it defaults
  33. to /usr), I needed to use --with-dom=/usr/local" );
  34. three = $root->new_child("question", "" );
  35. $three->setattr("number", "7" );
  36. $three->new_child("text", "7. How to use DOM XML function ?" );
  37. $three->new_child("answer", "Read this document source for
  38. a simple example." );
  39. //输出到Browser
  40. print(" pre>".htmlspecialchars($doc->dumpmem() )." /pre>" );
  41. // write to file
  42. //写回到文件
  43. fp = fopen("test_dom.xml", "w+" );
  44. fwrite($fp, $doc->dumpmem(), strlen($doc->dumpmem() ));
  45. fclose($fp);
  46. //现在使用xpath从XML文档中得到内容
  47. doc = xmldoc(join("", file("test_dom.xml")) );
  48. ctx = xpath_new_context($doc );
  49. //所有对象
  50. foo = xpath_eval($ctx, "//child::*");
  51. print_r($foo);
  52. print(" br/> br/>");
  53. //text node 对象
  54. foo = xpath_eval($ctx, "//text");
  55. print_r($foo);
  56. print(" br/> br/>");
  57. // 第一个text node对象
  58. foo = xpath_eval($ctx, "//text[1]");
  59. print_r($foo);
  60. print(" br/> br/>");
  61. // 第二个text node对象
  62. foo = xpath_eval($ctx, "//text[2]");
  63. print_r($foo);
  64. print(" br/> br/>");
  65. // 第三个answer对象
  66. foo = xpath_eval($ctx, "//answer[3]");
  67. print_r($foo);
  68. print(" br/> br/>");
  69. //第三个text node的类型,名称和内容
  70. foo = xpath_eval($ctx, "//text[3]");
  71. tmp = $foo->nodeset;
  72. print_r($tmp);
  73. print(" br/>");
  74. print($tmp[0]->type) . "; ";
  75. print($tmp[0]->name) . "; ";
  76. print($tmp[0]->content);
  77. ?>

需要说明,PHP DOM-XML只能在PHPPHP4.0.x + linux上运行