这篇文章主要介绍了php实现的xml操作类,涉及PHP针对xml文件的创建、读取、节点操作等常用技巧,需要的朋友可以参考下。

本文实例讲述了php实现的xml操作类，分享给大家供大家参考，具体如下：

1. <?php
2. /*
3. 使用方法:
4. $test=new xml();
5. $test->new_xml('test.xml');
6. $test->root('document');
7. $test->append_root_node('book');
8. $test->append_child_node('author','linage');
9. $test->append_child_node('page',100);
10. $test->append_child_node('money','35 RMB');
11. $test->append_root_node_end();
12. $test->append_root_node('book','name','The"Web"Servers');
13. $test->append_child_node('a u t ho"r','li n a g e');
14. $test->append_child_node('page',100);
15. $test->append_child_node('money','35 RMB');
16. $test->append_root_node_end();
17. $test->display();
18. $test->save();
19. 生成的xml结果:
20. <?xml version="1.0" encoding="utf-8"?>
21. <document>
22. <book>
23. <author>linage</author>
24. <page>100</page>
25. <money>35 RMB</money>
26. </book>
27. <book name="TheWebServers">
28. <author>li n a g e</author>
29. <page>100</page>
30. <money>35 RMB</money>
31. </book>
32. </document>
33. */
34. class xml{
35. var $version;
36. var $encoding;
37. var $start;
38. var $end;
39. var $filename;
40. var $xml_document;
41. var $root_start;
42. var $root_end;
43. var $rss_start;
44. var $rss_end;
45. function xml($ver='1.0',$encoding='GB2312'){
46. $this->version="<?xml version=/"{$ver}/" encoding=/"{$encoding}/" standalone=/"yes/" ?>";
47. $this->rss_start="<rss version=/"2.0/" xmlns:domxml=/"[url]http://xml.666life.com/rss/1.0[/url]/" xmlns:geo=/"[url]http://www.w3.org/2003/01/geo/wgs84_pos#[/url]/">";
48. $this->rss_end="</rss>";
49. }
50. function new_xml($filename){
51. $this->filename=$filename;
52. return true;
53. }
54. function root($element){
55. $element=$this->filter($element);
56. if(isset($this->start) and isset($this->end)){
57. exit("error:Only one top level element is allowed in an XML document./r/n");
58. }else{
59. $this->start="<$element>";
60. $this->end="</$element>";
61. $this->xml_document=$this->version."/n".$this->rss_start."/n".$this->start."/n";
62. return true;
63. }
64. }
65. function append_root_node($title,$property=null,$pro_val=null){
66. $title=$this->filter($title);
67. $property=$this->filter($property);
68. $pro_val=$this->filter($pro_val);
69. $property!=null?$pro_str=" $property=/"$pro_val/"":$property=null;
70. $contents="<{$title}{$pro_str}>/n";
71. $this->xml_document.=$contents;
72. $this->root_end="</$title>";
73. return true;
74. }
75. function append_root_node_end(){
76. $this->xml_document.=$this->root_end."/n";
77. return true;
78. }
79. function append_child_node($title='undefined',$contents='undefined',$property=null,$pro_val=null,$cddate=false){
80. isset($property)?$pro_str=" $property=/"$pro_val/"":$property=null;
81. $title=$this->filter($title);
82. $contents=$this->filter($contents,false);
83. $property=$this->filter($property);
84. $pro_val=$this->filter($pro_val);
85. $cddate===false?$cddate=false:$cddate=true;
86. if($cddate){
87. $contents="<{$title}{$pro_str}><!--[CDATA['/n$contents/n']]--></$title>/n";
88. }else{
89. $contents="<{$title}{$pro_str}>$contents</$title>";
90. }
91. $this->xml_document.=$contents."/n";
92. return true;
93. }
94. function display(){
95. header("Content-type: text/xml");
96. $xml=$this->xml_document.$this->end."/n".$this->rss_end;
97. echo $xml;
98. //return true;
99. }
100. function filter($sring,$replace_null=true){
101. $filter[]='"';
102. $filter[]="//";
103. $filter[]="/n";
104. $filter[]="/r";
105. $filter[]="/t";
106. $replace_null===true?$filter[]=" ":$replace_null=false;
107. foreach ($filter as $val){
108. $sring=str_replace($val,'',$sring);
109. }
110. return $sring;
111. }
112. function encode(){
113. //you can add the convert encode function here or add other class to do that
114. }
115. function save(){
116. $this->xml_document=$this->xml_document.$this->end."/n".$this->rss_end;
117. $handle=fopen($this->filename,'wb+');
118. $result=fwrite($handle,$this->xml_document);
119. fclose($handle);
120. if($result){
121. return true;
122. }else{
123. echo "error:can't write to files,maybe the access denied.try to chmod 777 the directory?";
124. return false;
125. }
126. }
127. }