一款实例mysql php连接类_PHP教程

一款实例mysql php连接类 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。

一款实例mysql教程 php教程连接类
 下面这款mysql数据库教程连接文章，是我从一个cms搞下来的，很完整的。直接调用就ok了。
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class dbmysq {  var $querynum = 0;  var $link;  var $histories;  var $time;  var $tablepre;  function connect($dbhost, $dbuser, $dbpw, $dbname = '', $dbcharset, $pconnect = 0, $tablepre='', $time = 0) {   $this->time = $time;   $this->tablepre = $tablepre;   if ($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, 1)) {     $this->halt('can not connect to mysql server');    }   }   if ($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, &$data) {   $query = $this->query($sql);   $data = $this->result($query, 0);  }  function fetch_first($sql, &$arr) {   $query = $this->query($sql);   $arr = $this->fetch_array($query);  }  function fetch_all($sql, &$arr) {   $query = $this->query($sql);   while ($data = $this->fetch_array($query)) {    $arr[] = $data;   }  }  function cache_gc() {   $this->query("delete from {$this->tablepre}sqlcaches where expirytime");  }  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='') {   exit('提示：数据库错误sql语句：' . $sql . '错误关键字：' . mysql_error());  } }

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