myql类的源码

<?php
class opmysql{
	  private $host= 'localhost';			//服务器地址
	  private $name= 'root';				//登陆名
	  private $pwd = 'root';				//登陆密码
	  private $db  = 'db';					//数据库名
	  private $conn= '';					//数据库链接资源
	  private $result= '';					//结果集
	  private $msg ='';						//返回结果
	  private $fields;						//返回字段数
	  private $fieldsNum = 0;				//返回字段的结果数	
	  private $rowsNum =0;					//返回行的结果数
	  private $rowsRst ='';					//返回单条记录的数组
	  private $fieldsArray = array();		//返回字段数组		
	  private $rowsArray = array();			//返回多条结果数组
  
	//初始化类
	function __construct($host ='',$name='',$pwd='',$db=''){
		if($host==''){
			$this->host =$host;		
		}
		if($name==''){
			$this->name =$name;
		}
		if($pwd ==''){
			$this->pwd  =$pwd;
		}
		if($db == ''){
			$this->db =$db;
		}
		$this->init_conn();
	}
	//链接数据库
	function init_conn(){
		$this->conn = @mysql_connect($this->host,$this->name,$this->pwd);
		@mysql_select_db($this->db,$this->conn);
		mysql_query("set names gb2312");
	}
	//查询结果集
	function mysql_query_rst($sql){
	    if($this->conn==''){
			$this->init_conn();
		}
		$this->result = @mysql_query($sql,$this->conn);
	}
	//取得字段数
	function getFieldsNum($sql){
		$this->mysql_query_rst($sql);
		$this->fieldsNum = @mysql_num_fields($this->result);
	}
	//获取总行数
	function getRowsNum($sql){
		$this->mysql_query_rst($sql);
		if(mysql_errno() == 0){
			return @mysql_num_rows($this->result,MYSQL_ASSOC);
		}else{
			return '';
		}
	}
	//获取单条记录数
	function getRowsRst($sql){
		$this->mysql_query_rst($sql);
		if(mysql_errno() == 0){
			$this->rowsRst =mysql_fetch_array($this->result,MYSQL_ASSOC);
			return $this->rowsRst;
		}else{
			return '';
		}
	}
	//获取多条记录
	function getRowsArray($sql){
		$this->mysql_query_rst($sql);
		if(mysql_errno() == 0){
			while($row= mysql_fetch_array($this->result,MYSQL_ASSOC){
				$this->rowsArray[] =$row;
			}
			return $this->rowsArray;
		}else{
			return '';
		}
	}
	//更新、删除、插入记录
	function uidRst($sql){
		if($this->conn ==''){
			$this->init_conn();
		}
		@mysql_query($sql);
		$this->rowsNum = mysql_affected_rows();
		if(mysql_errno() == 0){
			return $this->rowsNum;
		}else{
			return '';
		}
	}
	//获取对应的字段数
	function getFields($sql,$fields){
		$this->mysql_query_rst($sql);
		if(mysql_errno() == 0){
			if(mysql_num_fields($this->result) > 0){
				$tmp = @mysql_fetch_row($this->result);
				$this->fieldsArray =$tmp[$fields]
			}
			return $this->fieldsArray;
		}else{
			return '';
		}
	}
	//错误信息
	function msg_error(){
		if(mysql_errno() != 0){
			$this->msg = mysql_error();
		}
		return $this->msg;
	}
	//释放结果集
	function close_rst(){
		mysql_free_result($this->result);
		$this->msg ='';
		$this->fieldsNum =0;
		$this->rowsNum =0;
		$this->fieldsArray ='';
		$this->rowsArray ='';
	}
	//关闭数据库
	function close_conn(){
		$this->close_rst();
		mysql_close($this->conn);
		$this->conn ='';
	}
	$conne = new opmysql();
}
?>