php mysql数据库连接类程序代码
发布:smiling 来源: PHP粉丝网 添加日期:2014-09-11 23:13:54 浏览: 评论:0
- lass cls_mysql{
- var $querynum = 0;
- var $link;
- var $histories;
- var $dbhost;
- var $dbuser;
- var $dbpw;
- var $dbcharset;
- var $pconnect;
- var $tablepre;
- var $time;
- var $goneaway = 5;
- function connect($dbhost, $dbuser, $dbpw, $dbname = '', $dbcharset = '', $pconnect = 0, $tablepre='', $time = 0) {
- $this->dbhost = $dbhost;
- $this->dbuser = $dbuser;
- $this->dbpw = $dbpw;
- $this->dbname = $dbname;
- $this->dbcharset = $dbcharset;
- $this->pconnect = $pconnect;
- $this->tablepre = $tablepre;
- $this->time = $time;
- if($pconnect) {
- if(!$this->link = mysql_pconnect($dbhost, $dbuser, $dbpw)) {
- $this->halt('can not connect to mysql server');
- }
- } else {
- if(!$this->link = mysql_connect($dbhost, $dbuser, $dbpw)) {
- $this->halt('can not connect to mysql server');
- }
- }
- if($this->version() > '4.1') {
- if($dbcharset) {
- mysql_query("set character_set_connection=".$dbcharset.", character_set_results=".$dbcharset.", character_set_client=binary", $this->link);
- }
- if($this->version() > '5.0.1') {
- mysql_query("set sql_mode=''", $this->link);
- }
- }
- if($dbname) {
- mysql_select_db($dbname, $this->link);
- }
- }
- function fetch_array($query, $result_type = mysql_assoc) {
- return mysql_fetch_array($query, $result_type);
- }
- function result_first($sql) {
- $query = $this->query($sql);
- return $this->result($query, 0);
- }
- function fetch_first($sql) {
- $query = $this->query($sql);
- return $this->fetch_array($query);
- }
- function fetch_all($sql, $id = '') {
- $arr = array();
- $query = $this->query($sql);
- while($data = $this->fetch_array($query)) {
- $id ? $arr[$data[$id]] = $data : $arr[] = $data;
- }
- return $arr;
- }
- function cache_gc() {
- $this->query("delete from {$this->tablepre}sqlcaches where expiry<$this->time");
- }
- function query($sql, $type = '', $cachetime = false) {
- $func = $type == 'unbuffered' && @function_exists('mysql_unbuffered_query') ? 'mysql_unbuffered_query' : 'mysql_query';
- if(!($query = $func($sql, $this->link)) && $type != 'silent') {
- $this->halt('mysql query error', $sql);
- }
- $this->querynum++;
- $this->histories[] = $sql;
- return $query;
- }
- function affected_rows() {
- return mysql_affected_rows($this->link);
- }
- function error() {
- return (($this->link) ? mysql_error($this->link) : mysql_error());
- }
- function errno() {
- return intval(($this->link) ? mysql_errno($this->link) : mysql_errno());
- }
- function result($query, $row) {
- $query = @mysql_result($query, $row);
- return $query;
- }
- function num_rows($query) {
- $query = mysql_num_rows($query);
- return $query;
- }
- function num_fields($query) {
- return mysql_num_fields($query);
- }
- function free_result($query) {
- return mysql_free_result($query);
- }
- function insert_id() {
- return ($id = mysql_insert_id($this->link)) >= 0 ? $id : $this->result($this->query("select last_insert_id()"), 0);
- }
- function fetch_row($query) {
- $query = mysql_fetch_row($query);
- return $query;
- }
- function fetch_fields($query) {
- return mysql_fetch_field($query);
- }
- function version() {
- return mysql_get_server_info($this->link);
- }
- function close() {
- return mysql_close($this->link);
- }
- function halt($message = '', $sql = '') {
- $error = mysql_error();
- $errorno = mysql_errno();
- if($errorno == 2006 && $this->goneaway-- > 0) {
- $this->connect($this->dbhost, $this->dbuser, $this->dbpw, $this->dbname, $this->dbcharset, $this->pconnect, $this->tablepre, $this->time);//开源代码phpfensi.com
- $this->query($sql);
- } else {
- $s = '<b>error:</b>'.$error.'<br />';
- $s .= '<b>errno:</b>'.$errorno.'<br />';
- $s .= '<b>sql:</b>:'.$sql;
- exit($s);
- }
- }
- }
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