本款是利用php mysql 数据库操作类函数,可以删除,修改,增加,备份等对数据库的操作,同时还支持两种数据库连接方式,以前数据库编码等的设置,代码如下:

1. class dbstuff {
2. var $querynum = 0;
3. var $link;
4. var $sqlid;
5. var $record;
6. var $dbcharset='utf-8';
7. var $charset='utf-8';
8. function connect($dbhost, $dbuser, $dbpw, $dbname = '', $pconnect = 0, $halt = true) {
9. if($pconnect) {
10. if(!$this->link = @mysql_pconnect($dbhost, $dbuser, $dbpw)) {
11. $halt && $this->halt('can not connect to mysql server');
12. }
13. } else {
14. if(!$this->link = @mysql_connect($dbhost, $dbuser, $dbpw, 1)) {
15. $halt && $this->halt('can not connect to mysql server');
16. }
17. }
18. if($this->version() > '4.1') {
19. global $charset, $dbcharset;
20. if(!$dbcharset && in_array(strtolower($charset), array('gbk', 'big5', 'utf-8'))) {
21. $dbcharset = str_replace('-', '', $charset);
22. }
23. if($dbcharset) {
24. @mysql_query("set character_set_connection=$dbcharset, character_set_results=$dbcharset, character_set_client=binary", $this->link);
25. }
26. if($this->version() > '5.0.1') {
27. @mysql_query("set sql_mode=''", $this->link);
28. }
29. }
30. if($dbname) {
31. @mysql_select_db($dbname, $this->link);
32. }
33. }
34. function select_db($dbname) {
35. return mysql_select_db($dbname, $this->link);
36. }
37. function fetch_array($query, $result_type = mysql_assoc) {
38. return mysql_fetch_array($query, $result_type);
39. }
40. function query($sql, $type = '') {
41. global $debug, $discuz_starttime, $sqldebug, $sqlspenttimes;
42. $func = $type == 'unbuffered' && @function_exists('mysql_unbuffered_query') ?
43. 'mysql_unbuffered_query' : 'mysql_query';
44. if(!($query = $func($sql, $this->link))) {
45. if(in_array($this->errno(), array(2006, 2013)) && substr($type, 0, 5) != 'retry') {
46. $this->close();
47. $this->connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect);
48. $this->query($sql, 'retry'.$type);
49. } elseif($type != 'silent' && substr($type, 5) != 'silent') {
50. $this->halt('mysql query error', $sql);
51. }
52. }
53. $this->querynum++;
54. $this->sqlid=$query;
55. return $query;
56. }
57. function affected_rows() {
58. return mysql_affected_rows($this->link);
59. }
60. function error() {
61. return (($this->link) ? mysql_error($this->link) : mysql_error());
62. }
63. function errno() {
64. return intval(($this->link) ? mysql_errno($this->link) : mysql_errno());
65. }
66. function result($query, $row) {
67. $query = @mysql_result($query, $row);
68. return $query;
69. }
70. function result_first($sql) {
71. return $this->result($this->query($sql), 0);
72. }
73. function num_rows($query) {
74. $query = mysql_num_rows($query);
75. return $query;
76. }
77. function num_fields($query) {
78. return mysql_num_fields($query);
79. }
80. function free_result($query) {
81. return mysql_free_result($query);
82. }
83. function insert_id() {
84. return ($id = mysql_insert_id($this->link)) >= 0 ? $id : $this->result($this->query("select last_insert_id()"), 0);
85. }
86. function fetch_row($query) {
87. $query = mysql_fetch_row($query);
88. return $query;
89. }
90. function fetch_fields($query) {
91. return mysql_fetch_field($query);
92. }
93. function version() {
94. return mysql_get_server_info($this->link);
95. }
96. function close() {
97. return mysql_close($this->link);
98. }
99. function nr($sql_) {
100. if(!$sql_id) $sql_id=$this->sqlid;
101. return mysql_num_rows($sql_id);
102. }
103. function nf($sql_) {
104. if(!$sql_id) $sql_id=$this->sqlid;
105. return mysql_num_fields($sql_id);
106. }
107. function nextrecord($sql_) {
108. if(!$sql_id) $sql_id=$this->sqlid;
109. if($this->record=mysql_fetch_array($sql_id)) return $this->record;
110. else return false;
111. }
112. function f($name) {
113. if($this->record[$name]) return $this->record[$name];
114. else return false;
115. }
116. function lock($tblname,$op="write") {
117. if(mysql_query("lock tables ".$tblname." ".$op)) return true;
118. else return false;
119. }
120. function unlock()
121. {if(mysql_query("unlock tables")) return true; else return false;}
122. function ar() {
123. return @mysql_affected_rows($this->link);
124. }
125. function i_id() {
126. return mysql_insert_id();
127. }
128. function halt($message = '', $sql = '') {
129. define('cache_forbidden', true);
130. include('db_mysql_error.inc.php');
131. }//开源代码phpfensi.com
132. }