PHPmysql数据库操作类借鉴.pdf

<?php

class mysql {

private $db_host ; // 数据库主机

private $db_user ; // 数据库用户名

private $db_pwd ; // 数据库用户名密码

private $db_database ; // 数据库名

private $conn ; // 数据库连接标识 ;

private $result ; // 执行 query 命令的结果资源标识

private $sql ; //sql 执行语句

/* 构造函数 */

public function __construct($db_host, $db_user, $db_pwd, $db_database,

$conn, $coding) {

$this -> db_host = $db_host;

$this -> db_user = $db_user;

$this -> db_pwd = $db_pwd;

$this -> db_database = $db_database;

$this -> conn = $conn;

$this -> coding = $coding;

$this ->connect();

$this -> db_pwd );

} else {

// 即使链接

$this -> conn = mysql_connect( $this -> db_host , $this -> db_user ,

$this -> db_pwd );

}

if (!mysql_select_db( $this -> db_database , $this -> conn )) {

if ( $this -> show_error ) {

$this ->show_error( " 数据库不可用： " , $this -> db_database );

}

$this ->show_error( "SQL 语句错误： " , "SQL 查询语句为空 " );

}

$this -> sql = $sql;