完整的PHP MYSQL数据库类
导读：<?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...
?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
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 = false;
//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);
}
}
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() {
$this->
query("show databases");
echo "现有数据库：" . $amount = $this->
db_num_rows($rs);
echo "br />
";
$i = 1;
while ($row = $this->
fetch_array($rs)) {
echo "$i $row[Database]";
echo "br />
";
$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 $cnt) {
$rs[] = mysql_db_name($rsPtr, $i);
$i++;
}
return $rs;
}
/*查询数据库下所有的表*/
public function show_tables($database_name) {
$this->
query("show tables");
echo "现有数据库：" . $amount = $this->
db_num_rows($rs);
echo "br />
";
$i = 1;
while ($row = $this->
fetch_array($rs)) {
$columnName = "Tables_in_" . $database_name;
echo "$i $row[$columnName]";
echo "br />
";
$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($resultt="") {
if($resultt>
""){
return mysql_fetch_array($resultt);
}
else{
return mysql_fetch_array($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 = '', $debug = '') {
$condition = $condition ? ' Where ' . $condition : NULL;
if ($debug) {
echo "SELECT $columnName FROM $table $condition";
}
else {
$this->
query("SELECT $columnName FROM $table $condition");
}
}
//简化删除del
public function delete($table, $condition, $url = '') {
if ($this->
query("DELETE FROM $table WHERE $condition")) {
if (!empty ($url))
$this->
Get_admin_msg($url, '删除成功！');
}
}
//简化插入insert
public function insert($table, $columnName, $value, $url = '') {
if ($this->
query("INSERT INTO $table ($columnName) VALUES ($value)")) {
if (!empty ($url))
$this->
Get_admin_msg($url, '添加成功！');
}
}
//简化修改update
public function update($table, $mod_content, $condition, $url = '') {
//echo "UPDATE $table SET $mod_content WHERE $condition";
exit();
if ($this->
query("UPDATE $table SET $mod_content WHERE $condition")) {
if (!empty ($url))
$this->
Get_admin_msg($url);
}
}
/*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 "font color='red'>
" . $message . "/font>
";
echo "br />
";
}
else {
echo "fieldset>
";
echo "legend>
错误信息提示:/legend>
br />
";
echo "div style='font-size:14px;
clear:both;
font-family:Verdana, Arial, Helvetica, sans-serif;
'>
";
echo "div style='height:20px;
background:#000000;
border:1px #000000 solid'>
";
echo "font color='white'>
错误号：12142/font>
";
echo "/div>
br />
";
echo "错误原因：" . mysql_error() . "br />
br />
";
echo "div style='height:20px;
background:#FF0000;
border:1px #FF0000 solid'>
";
echo "font color='white'>
" . $message . "/font>
";
echo "/div>
";
echo "font color='red'>
pre>
" . $sql . "/pre>
/font>
";
$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 $filename 不可写";
}
}
}
echo "br />
";
if ($this->
is_error) {
exit;
}
}
echo "/div>
";
echo "/fieldset>
";
echo "br />
";
}
//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 "br />
";
echo "字段数：" . $total = mysql_num_fields($this->
result);
echo "pre>
";
for ($i = 0;
$i $total;
$i++) {
print_r(mysql_fetch_field($this->
result, $i));
}
echo "/pre>
";
echo "br />
";
}
//取得 MySQL 服务器信息
public function mysql_server($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);
}
function inject_check($sql_str) {
//防止注入
$check = eregi('select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile', $sql_str);
if ($check) {
echo "输入非法注入内容！";
exit ();
}
else {
return $sql_str;
}
}
function checkurl() {
//检查来路
if (preg_replace("/https?:\/\/([^\:\/]+).*/i", "\\1", $_SERVER['HTTP_REFERER']) !== preg_replace("/([^\:]+).*/", "\\1", $_SERVER['HTTP_HOST'])) {
header("Location: http://www.dareng.com");
exit();
}
}
}
?>
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