php读取xml的类

3. #------------------------------------------

4. #
5. # XML Library, by Keith Devens, version 1.2b
6. # http://keithdevens.com/software/phpxml
7. #
8. # This code is Open Source, released under terms similar to the Artistic License.
9. # Read the license at http://keithdevens.com/software/license
10. #
11. #------------------------------------------
12. # XML_unserialize: takes raw XML as a parameter (a string)
13. # and returns an equivalent PHP data structure
14. #------------------------------------------
15. function & XML_unserialize(&$xml){
16. $xml_parser = &new XML();
17. $data = &$xml_parser->parse($xml);
18. $xml_parser->destruct();
19. return $data;
20. }
21. -----------------------#####
22. # XML_serialize: serializes any PHP data structure into XML
23. # Takes one parameter: the data to serialize. Must be an array.
24. -----------------------#
25. function & XML_serialize(&$data, $level = 0, $prior_key = NULL){
26. if($level == 0){ ob_start(); echo '',"\n"; }
27. while(list($key, $value) = each($data))
28. if(!strpos($key, ' attr')) #if it's not an attribute
29. #we don't treat attributes by themselves, so for an empty element
30. # that has attributes you still need to set the element to NULL

31. if(is_array($value) and array_key_exists(0, $value)){

32. XML_serialize($value, $level, $key);
33. }else{
34. $tag = $prior_key ? $prior_key : $key;
35. echo str_repeat("\t", $level),'<',$tag;
36. if(array_key_exists("$key attr", $data)){ #if there's an attribute for this element
37. while(list($attr_name, $attr_value) = each($data["$key attr"]))
38. echo ' ',$attr_name,'="',htmlspecialchars($attr_value),'"';
39. reset($data["$key attr"]);
40. }

41. if(is_null($value)) echo " />\n";

42. elseif(!is_array($value)) echo '>',htmlspecialchars($value),"\n";
43. else echo ">\n",XML_serialize($value, $level+1),str_repeat("\t", $level),"\n";
44. }
45. reset($data);
46. if($level == 0){ $str = &ob_get_contents(); ob_end_clean(); return $str; }
47. }
48. #-----------------------#
49. # XML class: utility class to be used with PHP's XML handling functions
50. #-----------------------#
51. class XML{
52. var $parser; #a reference to the XML parser
53. var $document; #the entire XML structure built up so far
54. var $parent; #a pointer to the current parent - the parent will be an array
55. var $stack; #a stack of the most recent parent at each nesting level
56. var $last_opened_tag; #keeps track of the last tag opened.

57. function XML(){

58. $this->parser = &xml_parser_create();
59. xml_parser_set_option(&$this->parser, XML_OPTION_CASE_FOLDING, false);
60. xml_set_object(&$this->parser, &$this);
61. xml_set_element_handler(&$this->parser, 'open','close');
62. xml_set_character_data_handler(&$this->parser, 'data');
63. }
64. function destruct(){ xml_parser_free(&$this->parser); }
65. function & parse(&$data){
66. $this->document = array();
67. $this->stack = array();
68. $this->parent = &$this->document;
69. return xml_parse(&$this->parser, &$data, true) ? $this->document : NULL;
70. }
71. function open(&$parser, $tag, $attributes){
72. $this->data = ''; #stores temporary cdata
73. $this->last_opened_tag = $tag;
74. if(is_array($this->parent) and array_key_exists($tag,$this->parent)){ #if you've seen this tag before
75. if(is_array($this->parent[$tag]) and array_key_exists(0,$this->parent[$tag])){ #if the keys are numeric
76. #this is the third or later instance of $tag we've come across
77. $key = count_numeric_items($this->parent[$tag]);
78. }else{
79. #this is the second instance of $tag that we've seen. shift around
80. if(array_key_exists("$tag attr",$this->parent)){
81. $arr = array('0 attr'=>&$this->parent["$tag attr"], &$this->parent[$tag]);
82. unset($this->parent["$tag attr"]);
83. }else{
84. $arr = array(&$this->parent[$tag]);
85. }
86. $this->parent[$tag] = &$arr;
87. $key = 1;
88. }
89. $this->parent = &$this->parent[$tag];
90. }else{
91. $key = $tag;
92. }
93. if($attributes) $this->parent["$key attr"] = $attributes;
94. $this->parent = &$this->parent[$key];
95. $this->stack[] = &$this->parent;
96. }
97. function data(&$parser, $data){
98. if($this->last_opened_tag != NULL) #you don't need to store whitespace in between tags
99. $this->data .= $data;
100. }
101. function close(&$parser, $tag){
102. if($this->last_opened_tag == $tag){
103. $this->parent = $this->data;
104. $this->last_opened_tag = NULL;
105. }
106. array_pop($this->stack);
107. if($this->stack) $this->parent = &$this->stack[count($this->stack)-1];
108. }
109. }
110. function count_numeric_items(&$array){
111. return is_array($array) ? count(array_filter(array_keys($array), 'is_numeric')) : 0;
112. }
113. ?>

应用实例，XML来源地址：http://data.cnaz.com/spread/?tid=7&sid=42845&order=date&flags=desc&num=50 &page=1&hosts=pic.ttiankan.com&code=xml

3. include('xml.php'); //引用PHP XML操作类

4. $page=$_GET['page'];

5. if(empty($page) || !is_numeric($page)) $page=1;

6. //偶像明星

7. $xml = file_get_contents('http://data.cnaz.com/spread/?tid=7&sid=42845&order=date&flags=desc&num=50
8. &page='.$page.'&hosts=pic.ttiankan.com&code=xml');

10. //$xml = file_get_contents("php://input"); //读取POST过来的输入流
11. $data=XML_unserialize($xml);

12. $item=$data['rss']['channel'];

13. $link = $item['link'];

14. $description= $item['description'];
15. $keywords = $item['keywords'];
16. $totalnum = $item['totalnum'];
17. $usetime = $item['usetime'];

18. $totalpage=ceil($totalnum/50);

19. echo('关键字:'.$keywords.' ');

20. echo('总记录数:'.$totalnum.', 每页显示50条,一共有'.$totalpage.'页, 当前是第'.$page.'页');

21. $item=$item['item'];

22. echo('

24. ');

25. echo('

26. ');

    foreach($item as $list)

    {
    echo('
    ');
    echo('
    ');
    echo('
    ');
    echo('
    ');
    echo('
    ');
    }

    echo('

    ');

    echo('

    分类	标题	链接
    '.$list['sort'].'	'.$list['title'].'	'.$list['link'].'
    '); if($page>1) echo('上一页 '); if($page<$totalpage) echo('下一页'); echo('

    ');
27. ?>

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