【www.gdgbn.com--mysql教程】

 代码如下

class mysql {
 var $linkid=null;

    function __construct($dbhost, $dbuser, $dbpw, $dbname = "", $dbcharset = "gbk", $connect = 1) {
     $this -> connect($dbhost, $dbuser, $dbpw, $dbname, $dbcharset, $connect);
    }

    function connect($dbhost, $dbuser, $dbpw, $dbname = "", $dbcharset = "gbk", $connect=1){
     $func = empty($connect) ? "mysql_pconnect" : "mysql_connect";
     if(!$this->linkid = @$func($dbhost, $dbuser, $dbpw, true)){
      $this->dbshow("can not connect to mysql!");
     } else {
      if($this->dbversion() > "4.1"){
       mysql_query( "set names gbk");
       if($this->dbversion() > "5.0.1"){
        mysql_query("set sql_mode = """,$this->linkid);
       }
      }
     }
     if($dbname){
      if(mysql_select_db($dbname, $this->linkid)===false){
       $this->dbshow("can"t select mysql database($dbname)!");
      }
     }
    }

    function select_db($dbname){
     return mysql_select_db($dbname, $this->linkid);
    }

    function query($sql){
     if(!$query=@mysql_query($sql, $this->linkid)){
      $this->dbshow("query error:$sql");
     }else{
      return $query;
     }
    }

    function getall($sql, $type=mysql_assoc){
     $query = $this->query($sql);
     while($row = mysql_fetch_array($query,$type)){
      $rows[] = $row;
     }
     return $rows;
    }

    function getone($sql, $type=mysql_assoc){
     $query = $this->query($sql,$this->linkid);
     $row = mysql_fetch_array($query, $type);
     return $row;
    }

 function fetch_array($result,$type = mysql_assoc){
  return mysql_fetch_array($result);
 }

    function affected_rows(){
     return mysql_affected_rows($this->linkid);
    }

    function num_rows(){
     return mysql_num_rows($this->linkid);
    }

    function num_fields($result){
     return mysql_num_fields($result);
    }

    function insert_id(){
     return mysql_insert_id($this->linkid);
    }

    function free_result(){
     return mysql_free_result($this->linkid);
    }

    function error(){
     return mysql_error($this->linkid);
    }

    function errno(){
     return mysql_errno($this->linkid);
    }

    function close(){
     return mysql_close($this->linkid);
    }

    function dbversion(){
     return mysql_get_server_info($this->linkid);
    }

    function dbshow($msg){
     if($msg){
      echo "error：".$msg."

";
     }else{
      echo "errno：".$this->errno()."
error：".$this->error();
     }
     exit;
    }

}

本文来源：http://www.gdgbn.com/shujuku/26756/