下面这款mysql数据库连接文章,是我从一个cms搞下来的,很完整的,直接调用就OK了,代码如下:

1. class dbmysq {
2. var $querynum = 0;
3. var $link;
4. var $histories;
5. var $time;
6. var $tablepre;
7. function connect($dbhost, $dbuser, $dbpw, $dbname = '', $dbcharset, $pconnect = 0, $tablepre='', $time = 0) {
8. $this->time = $time;
9. $this->tablepre = $tablepre;
10. if ($pconnect) {
11. if (!$this->link = mysql_pconnect($dbhost, $dbuser, $dbpw)) {
12. $this->halt('can not connect to mysql server');
13. }
14. } else {
15. if (!$this->link = mysql_connect($dbhost, $dbuser, $dbpw, 1)) {
16. $this->halt('can not connect to mysql server');
17. }
18. }
19. if ($this->version() > '4.1') {
20. if ($dbcharset) {
21. mysql_query("set character_set_connection=" . $dbcharset . ", character_set_results=" . $dbcharset . ", character_set_client=binary", $this->link);
22. }
23. if ($this->version() > '5.0.1') {
24. mysql_query("set sql_mode=''", $this->link);
25. }
26. }
27. if ($dbname) {
28. mysql_select_db($dbname, $this->link);
29. }
30. }
31. function fetch_array($query, $result_type = mysql_assoc) {
32. return mysql_fetch_array($query, $result_type);
33. }
34. function result_first($sql, &$data) {
35. $query = $this->query($sql);
36. $data = $this->result($query, 0);
37. }
38. function fetch_first($sql, &$arr) {
39. $query = $this->query($sql);
40. $arr = $this->fetch_array($query);
41. }
42. function fetch_all($sql, &$arr) {
43. $query = $this->query($sql);
44. while ($data = $this->fetch_array($query)) {
45. $arr[] = $data;
46. }
47. }
48. function cache_gc() {
49. $this->query("delete from {$this->tablepre}sqlcaches where expiry<$this->time");
50. }
51. function query($sql, $type = '', $cachetime = false) {
52. $func = $type == 'unbuffered' && @function_exists('mysql_unbuffered_query') ? 'mysql_unbuffered_query' : 'mysql_query';
53. if (!($query = $func($sql, $this->link)) && $type != 'silent') {
54. $this->halt('mysql query error', $sql);
55. }
56. $this->querynum++;
57. $this->histories[] = $sql;
58. return $query;
59. }
60. function affected_rows() {
61. return mysql_affected_rows($this->link);
62. }
63. function error() {
64. return (($this->link) ? mysql_error($this->link) : mysql_error());
65. }
66. function errno() {
67. return intval(($this->link) ? mysql_errno($this->link) : mysql_errno());
68. }
69. function result($query, $row) {
70. $query = @mysql_result($query, $row);
71. return $query;
72. }
73. function num_rows($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($this->link);
98. }//开源代码phpfensi.com
99. function halt($message='', $sql='') {
100. exit('<br/>提示：数据库错误<br/>sql语句：' . $sql . '<br/>错误关键字：' . mysql_error());
101. }
102. }