/*
* filename:mysql数据库连接类
* edit bbs.it-home.org
*/
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
private $row; //返回的条目数
private $coding; //数据库编码,GBK,UTF8,gb2312
private $bulletin = true; //是否开启错误记录
private $show_error = true; //测试阶段,显示所有错误,具有安全隐患,默认关闭
private $is_error = false; //发现错误是否立即终止,默认true,建议不启用,因为当有问题时用户什么也看不到是很苦恼的
/*构造函数*/
public function __construct($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;
$this->connect();
}
/*数据库连接*/
public function connect()
{
if($this->conn=="pconn"){
//永久链接
$this->conn=mysql_pconnect($this->db_host,$this->db_user,$this->db_pwd);
}else{
//即时链接
$this->conn=mysql_connect($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);
}
}
mysql_query("SET NAMES $this->coding");
}
/*数据库执行语句,可执行查询添加修改删除等任何sql语句*/
public function query($sql)
{
if($sql == ""){
$this->show_error("sql语句错误:","sql查询语句为空");}
$this->sql = $sql;
$result = mysql_query($this->sql,$this->conn);
if(!$result){
//调试中使用,sql语句出错时会自动打印出来
if($this->show_error){
$this->show_error("错误sql语句:",$this->sql);
}
}else{
$this->result = $result;
}
return $this->result;
}
/*创建添加新的数据库*/
public function create_database($database_name){
$database=$database_name;
$sqlDatabase = 'create database '.$database;
$this->query($sqlDatabase);
}
/*查询服务器所有数据库*/
//将系统数据库与用户数据库分开,更直观的显示?
public function show_databases(){
$rs=$this->query("show databases");
echo "现有数据库:".$amount =$this->db_num_rows($rs);
echo " ";
$i=1;
while($row = $this->fetch_array($rs)){
echo "$i $row[Database]";
echo " ";
$i++;
}
}
//以数组形式返回主机中所有数据库名
public function databases()
{
$rsPtr=mysql_list_dbs($this->conn);
$i=0;
$cnt=mysql_num_rows($rsPtr);
while($i{
$rs[]=mysql_db_name($rsPtr,$i);
$i++;
}
return $rs;
}
/*查询数据库下所有的表*/
function show_tables($database_name){
$this->query("show tables");
echo "现有数据库:".$amount = $this->db_num_rows($rs);
echo " ";
$i=1;
while($row = $this->fetch_array($rs)){
$columnName="Tables_in_".$database_name;
echo "$i $row[$columnName]";
echo " ";
$i++;
}
}
/*
mysql_fetch_row() array $row[0],$row[1],$row[2]
mysql_fetch_array() array $row[0] 或 $row[id]
mysql_fetch_assoc() array 用$row->content 字段大小写敏感
mysql_fetch_object() object 用$row[id],$row[content] 字段大小写敏感
*/
/*取得结果数据*/
public function mysql_result_li()
{
return mysql_result($str);
}
/*取得记录集,获取数组-索引和关联,使用$row['content'] */
public function fetch_array()
{
return mysql_fetch_array($this->result);
}
//获取关联数组,使用$row['字段名']
public function fetch_assoc()
{
return mysql_fetch_assoc($this->result);
}
//获取数字索引数组,使用$row[0],$row[1],$row[2]
public function fetch_row()
{
return mysql_fetch_row($this->result);
}
//获取对象数组,使用$row->content
public function fetch_Object()
{
return mysql_fetch_object($this->result);
}
//简化查询select
public function findall($table)
{
$this->query("SELECT * FROM $table");
}
//简化查询select
public function select($table,$columnName,$condition)
{
if($columnName==""){
$columnName="*";
}
$this->query("SELECT $columnName FROM $table $condition");
}
//简化删除del
public function delete($table,$condition){
$this->query("DELETE FROM $table WHERE $condition");
}
//简化插入insert
public function insert($table,$columnName,$value){
$this->query("INSERT INTO $table ($columnName) VALUES ($value)");
}
//简化修改update
public function update($table,$mod_content,$condition){
$this->query("UPDATE $table SET $mod_content WHERE $condition");
}
/*取得上一步 INSERT 操作产生的 ID*/
public function insert_id(){
return mysql_insert_id();
}
//指向确定的一条数据记录
public function db_data_seek($id){
if($id>0){
$id=$id-1;
}
if(!@mysql_data_seek($this->result,$id)){
$this->show_error("sql语句有误:", "指定的数据为空");
}
return $this->result;
}
// 根据select查询结果计算结果集条数
public function db_num_rows(){
if($this->result==null){
if($this->show_error){
$this->show_error("sql语句错误","暂时为空,没有任何内容!");
}
}else{
return mysql_num_rows($this->result);
}
}
// 根据insert,update,delete执行结果取得影响行数
public function db_affected_rows(){
return mysql_affected_rows();
}
//输出显示sql语句
public function show_error($message="",$sql=""){
if(!$sql){
echo "".$message." ";
echo " ";
}else{
echo "";echo "错误信息提示:
";
echo "";
echo "";
echo "错误号:12142 ";
echo "
";
echo "错误原因:".mysql_error()." ";
echo "";
echo "".$message." ";
echo "
";
echo "".$sql." ";
$ip=$this->getip();
if($this->bulletin){
$time = date("Y-m-d H:i:s");
$message=$message."/r/n$this->sql"."/r/n客户IP:$ip"."/r/n时间 :$time"."/r/n/r/n";
$server_date=date("Y-m-d");
$filename=$server_date.".txt";
$file_path="error/".$filename;
$error_content=$message;
//$error_content="错误的数据库,不可以链接";
$file = "error"; //设置文件保存目录
//建立文件夹
if(!file_exists($file)){
if(!mkdir($file,0777)){
//默认的 mode 是 0777,意味着最大可能的访问权
die("upload files directory does not exist and creation failed");
}
}
//建立txt日期文件
if(!file_exists($file_path)){
//echo "建立日期文件";
fopen($file_path,"w+");
//首先要确定文件存在并且可写
if (is_writable($file_path))
{
//使用添加模式打开$filename,文件指针将会在文件的开头
if (!$handle = fopen($file_path, 'a'))
{
echo "不能打开文件 $filename";
exit;
}
//将$somecontent写入到我们打开的文件中。
if (!fwrite($handle, $error_content))
{
echo "不能写入到文件 $filename";
exit;
}
//echo "文件 $filename 写入成功";
echo "——错误记录被保存!";
//关闭文件
fclose($handle);
} else {
echo "文件 $filename 不可写";
}
}else{
//首先要确定文件存在并且可写
if (is_writable($file_path))
{
//使用添加模式打开$filename,文件指针将会在文件的开头
if (!$handle = fopen($file_path, 'a'))
{
echo "不能打开文件 $filename";
exit;
}
//将$somecontent写入到我们打开的文件中。
if (!fwrite($handle, $error_content))
{
echo "不能写入到文件 $filename";
exit;
}
//echo "文件 $filename 写入成功";
echo "——错误记录被保存!";
//关闭文件
fclose($handle);
} else {
echo "文件 $filename 不可写";
}
}
}
echo " ";
if($this->is_error){
exit;
}
}
echo "
";
echo "
";
echo " ";
}
//释放结果集
public function free(){
@mysql_free_result($this->result);
}
//数据库选择
public function select_db($db_database){
return mysql_select_db($db_database);
}
//查询字段数量
public function num_fields($table_name){
//return mysql_num_fields($this->result);
$this->query("select * from $table_name");
echo " ";
echo "字段数:".$total = mysql_num_fields($this->result);
echo "";
for ($i=0; $iprint_r(mysql_fetch_field($this->result,$i) );
}
echo "";
echo " ";
}
//取得 MySQL 服务器信息
public function mysql_server($num=''){
switch ($num){
case 1 :
return mysql_get_server_info(); //MySQL 服务器信息
break;
case 2 :
return mysql_get_host_info(); //取得 MySQL 主机信息
break;
case 3 :
return mysql_get_client_info(); //取得 MySQL 客户端信息
break;
case 4 :
return mysql_get_proto_info(); //取得 MySQL 协议信息
break;
default:
return mysql_get_client_info(); //默认取得mysql版本信息
}
}
//析构函数,自动关闭数据库,垃圾回收机制
public function __destruct()
{
if(!empty($this->result)){
$this->free();
}
mysql_close($this->conn);
}//function __destruct();
/*获得客户端真实的IP地址*/
function getip(){
if(getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
{
$ip = getenv("HTTP_CLIENT_IP");
}
else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")){
$ip = getenv("HTTP_X_FORWARDED_FOR");
}
else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
{
$ip = getenv("REMOTE_ADDR");
}
else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")){
$ip = $_SERVER['REMOTE_ADDR'];
}
else{
$ip = "unknown";
}
return($ip);
}
}
?>
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