sqlite 数据库连接类就是利用了php 与sqlite进行连接操作,代码如下:

1. */
2. lass db_class {
3. var $conn=null;
4. var $querynum = 0;
5. /**
6. * 数据库连接，返回数据库连接标识符
7. *
8. * @param string $ 数据库服务器主机
9. * @param string $ 数据库服务器帐号
10. * @param string $ 数据库服务器密码
11. * @param string $ 数据库名
12. * @param bool $ 是否保持持续连接，1为持续连接，0为非持续连接
13. * @return link_identifier $dbuser, $dbpw, $dbname,
14. */
15. function connect($dbhost, $pconnect = 0) {
16. $error = '';
17. $func = $pconnect == 1 ? 'sqlite_popen' : 'sqlite_open';
18. if (!$this -> conn = $func($dbhost, 0666, $error)) {
19. $this -> halt($error);
20. }
21. return $this -> conn;
22. }
23. /**
24. * 执行sql语句
25. *
26. * @param string $ sql语句
27. * @param string $ 默认为空，可选值为 cache unbuffered
28. * @param int $ cache以秒为单位的生命周期
29. * @return resource
30. */
31. function query($sql , $type = '' , $expires = 3600, $dbname = '') {
32. $error = '';
33. $func = $type == 'unbuffered' ? 'sqlite_unbuffered_query' : 'sqlite_query';
34. if (preg_match("/^s*select/i", $sql)) {
35. $query = $func($this -> conn, $sql, sqlite_assoc, $error);
36. } else {
37. $query = sqlite_exec($this -> conn, $sql, $error);
38. }
39. if ($error) {
40. $this -> halt($error, $sql);
41. }
42. $this -> querynum++;
43. return $query;
44. }
45. /*
46. *@param string $ table名
47. *@param string $ where条件
48. *@param string $ colum名
49. *@param string $ limit数量
50. */
51. function getlist($table , $wheres = "1=1", $colums = '*' ,$limits = '3000',$orderbys="id desc") {
52. $query = $this -> query("select ".$colums." from ".$table." where ".$wheres." order by ".$orderbys." limit ".$limits, $type, $expires, $dbname);
53. while($rs = $this -> fetch_array($query)){
54. $datas[]=$rs;
55. }
56. //print_r("select ".$colums." from ".$table." where ".$wheres." limit ".$limits);
57. //print_r($rs);die();
58. $this -> free_result($query);
59. return $datas ;
60. }
61. function add_one($table , $colums ,$data ) {
62. //die("insert into ".$table." (".$colums.") values(".$data.")");
63. $query = $this -> query("insert into ".$table." (".$colums.") values(".$data.")", $type, $expires, $dbname);
64. //return $this->insert_id();
65. return $query;
66. }
67. function delist($table , $idarray,$wheres="no") {
68. if($wheres=='no')
69. $query = $this -> query("delete from ".$table." where id in(".$idarray.")", $type, $expires, $dbname);
70. else
71. $query = $this -> query("delete from ".$table." where ".$wheres, $type, $expires, $dbname);
72. return $query;
73. }
74. function updatelist($table , $updatedata,$idarray) {
75. $query = $this -> query("update ".$table." set ". $updatedata." where id in(".$idarray.")", $type, $expires, $dbname);
76. return $query;
77. }
78. //update max_vote set maxtitle='$title',maxban='$ban',
79. /**
80. * 执行sql语句，只得到一条记录
81. *
82. * @param string $ sql语句
83. * @param string $ 默认为空，可选值为 cache unbuffered
84. * @param int $ cache以秒为单位的生命周期
85. * @return array
86. */
87. function get_one($sql, $type = '', $expires = 3600, $dbname = '') {
88. $query = $this -> query($sql, $type, $expires, $dbname);
89. $rs = $this -> fetch_array($query);
90. $this -> free_result($query);
91. return $rs ;
92. }
93. /**
94. * 从结果集中取得一行作为关联数组
95. *
96. * @param resource $ 数据库查询结果资源
97. * @param string $ 定义返回类型
98. * @return array
99. */
100. function fetch_array($query, $result_type = sqlite_assoc) {
101. return sqlite_fetch_array($query, $result_type);
102. }
103. /**
104. * 取得前一次 sqlite操作所影响的记录行数
105. *
106. * @return int
107. */
108. function affected_rows() {
109. return sqlite_changes($this -> conn);
110. }
111. /**
112. * 取得结果集中行的数目
113. *
114. * @return int
115. */
116. function num_rows($query) {
117. return sqlite_num_rows($query);
118. }
119. /**
120. * 返回结果集中字段的数目
121. *
122. * @return int
123. */
124. function num_fields($query) {
125. return sqlite_num_fields($query);
126. }
127. /**
128. *
129. * @return array 备用,一般不用.
130. */
131. function result($query, $row) {
132. return @sqlite_fetch_all($query, sqlite_assoc);
133. }
134. /**
135. * sqlite没有相应函数
136. */
137. function free_result($query) {
138. return ;
139. }
140. /**
141. * 取得上一步 insert 操作产生的 id
142. *
143. * @return int
144. */
145. function insert_id() {
146. return sqlite_last_insert_rowid($this -> connid);
147. }
148. /**
149. *
150. * @return array 只得到数字索引
151. */
152. function fetch_row($query) {
153. return sqlite_fetch_array($query, sqlite_num);
154. }
155. /**
156. */
157. function fetch_assoc($query) {
158. return $this -> fetch_array($query, sqlite_assoc);
159. }
160. /**
161. *
162. * @return string
163. */
164. function version() {
165. return sqlite_libversion();
166. }
167. function close() {
168. return sqlite_close($this -> conn);
169. }
170. /**
171. *
172. * @return string
173. */
174. function error() {
175. return sqlite_error_string($this -> errno);
176. }
177. /**
178. *
179. * @return int
180. */
181. function errno() {
182. return sqlite_last_error($this -> conn);
183. }
184. /**
185. * 显示mysql教程错误信息
186. */
187. function halt($message = '', $sql = '') {
188. exit("sqlitequery:$sql <br> sqliteerror:" . $this -> error() . " <br> sqliteerrno:" . $this -> errno() . " <br> message:$message");
189. } //开源代码phpfensi.com