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", $level),' if(array_key_exists("$key attr", $data)){ #if there's an attribute for this element
36. while(list($attr_name, $attr_value) = each($data["$key attr"]))
37. echo ' ',$attr_name,'="',htmlspecialchars($attr_value),'"';
38. reset($data["$key attr"]);
39. }

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

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

56. function XML(){

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

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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

');

$item=$item['item'];

echo('

');

echo('

');

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下一页'); echo('

');

?>

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