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一個資料庫操作PHP類

WBOY

發布： 2016-07-25 08:44:27

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/*
* Author 墨龍
* Time 2010年12月2日15:50:35
* Time 2010年2月2日15:50:35
*/
*/
$db = new mysql($db_host,$db_user,$db_password,$db_table,$db_conn,$pre,$coding);
class mysql{
private $host ;
private $db_user;
private $db_password;
private $db_table;
private $db_conn; //資料庫連線識別碼;
private $result;識別
private $sql; //sql執行語句
private $pre; //資料庫表前綴
private $coding; //資料庫編碼，GBK,UTF8,gb2312
function __construct ($db_host,$db_user,$db_password,$db_table,$db_conn,$pre,$coding){
$this->db_host = $db_host;
$this->db_user = $db_user;
$this->db_password = $db_password;
$this->db_table = $db_table;
$this->db_conn = $db_conn;
$this->pre = $pre;
$this->coding = $coding;
$this->connect();
}
function connect(){
$this->db_conn = @mysql_connect($this->db_host,$this->db_user,$this->db_password) or die($this->show_error("資料庫連結錯誤,請檢查資料庫連結設定！ "));
if(!mysql_select_db($this->db_table,$this->db_conn)){
echo "找不到資料表：".$this->db_table;
}
mysql_select_db($this->db_table,$this->db_conn);
$this->query("SET NAMES $this->coding");
}
/ *執行SQL語句的函數*/
function query($sql){
if(emptyempty($sql)){ $this->show_error("你的sql語句不能為空！");
}else{
$this->sql = $sql;
}
$result = mysql_query($this->sql,$this->db_conn);
return $this->result = $result;
}
/*建立新增新的資料庫*/
public function create_database($databasename){ $database=$base_name ;
$sqlDatabase = 'create database '.$database;
return $this->query($sqlDatabase);
}
// 根據select查詢結果計算結果集條數
public function db_num_rows(){
if($this->result==null){
if($this->show_error){
$this->show_error("sql語句錯誤! ");
}
}else{
return mysql_num_rows($this->result);
}
}
/*查詢服務器所有數據庫*/
//將系統資料庫與使用者資料庫分開，更直覺的顯示？ .$amount =$this->db_num_rows($rs);
echo "
";
$i=1;
while($row = $this->fetch_array($rs) ){
echo "$i $row[Database]";
echo "
";
$i ;
}
}
//以陣列形式傳回主機中所有資料庫名稱
public function databases()
{
$rsPtr=mysql_list_dbs($this->db_conn);
$i=0;
$cnt=mysql_rows ($rsPtr);
while($i {
$rs[]=mysql_db_name($rsPtr,$i);
$i ;
}
}
return print_r($rs);
}
/*查詢資料庫下所有的表格*/
function show_tables($database_name){
$this->query("show tables" );
echo "現有資料庫：".$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$row->content 欄位大小寫敏感
mysql_fetch_object() object 用$rowid] [content] 欄位大小寫敏感
*/
/*取得記錄集,取得陣列-索引與關聯,使用$row['content'] */
public function fetch_array()
{
return @mysql_fetch_array($this->result);
}
//取得關聯陣列,使用$row['欄位名稱']
public function fetch_ass()
{
return @mysql_fetch_assoc($this->result);
}
//取得數字索引陣列,使用$row[0],$row[1],$row[2]
public function fetch_row()
{
return @mysql_fetch_row($this->result);
}
//取得物件陣列,使用$row->content
public function fetch_Object()
{
return @mysql_fetch_object($this->result);
}
//簡化查詢
$table = $this->fulltablename($table);
$this->query("select * from $table");
}
public function select($table ,$columnName,$condition){
$table = $this->fulltablename($table);
if(emptyempty($columnName)){
$columnName = "*";
} }
$this->query("SELECT $columnName FROM $table $condition");
}
//簡化的insert
function insert($table,$arr){
$table = $this->fulltablename($table);
$sql = "INSERT INTO $table ";
if(!is_array($arr)){
$this->show_error( "請輸入參數數組！");
}else{
$k = "";
$v = "";
foreach($arr as $key => $value){
$k . = "`$key`,";
$v .= "'".$value."',";
}
}
$sql = $sql." (".substr($k,0,-1).") VALUES (".substr($v,0,-1).")";
$this->query($sql);
}
// 簡化更新
function update($table,$arr,$where){
$table = $this->fulltablename($table)
$sql = "UPDATE $table SET ";
if(!is_array($arr)){
$this->show_error("請輸入備份參數！");
}else{
foreach($arr as $key => $value){
$sql .= " `".$key."` = '".$value." ' ,";
}
}
$sql = substr($sql,0,-1)." where ".$where;
return $this->query($sql) ;
}
//簡化刪除
function delete($table,$where = ""){
$table = $this->fullttablename($table); emptyempty($where)){
$this->show_error("條件不可能為空！"
}else{
$where = " where ".$where
} $sql = "DELETE FROM $table ".$where
//echo $sql;
return $this->query($sql); }
//取得第一步INSERT操作生產ID
public function insert_id (){
return mysql_insert_id()
}
//附加編號調整
public function fulltablename($table){
return $table = $this->pre.$ table
}
//列數
public function num_fields($table){
$table = $ this->fulltablename($table);
$this->query ("select * from $table");
echo "
";
echo "列數:".$total = mysql_num_fields($this->result);
echo "
```
"; 
```
登入後複製
for ($i=0; $i print_r(mysql_fetch_field($this->結果,$i) );
}
echo " "
echo "
"; 🎜>
//取得MySQL伺服器資訊
public function mysql_server($num=''){
switch ($num){
case 1 :
return mysql_get_server_info (); // MySQL 主機資訊
break;
case 2 :
return mysql_get_host_info();
case 3 :
return mysql_get_client_info (); //取得MySQL客戶端資訊
case 4 :
return mysql_get_proto_info();
預設:
return mysql_get_client_info(); //取得mysql版本資訊
}
}
//分析函數、自動控制號設定、容器恢復機制
/*public function __destruct( )
{
if(!empty($this->result)){
$this->free();
}
mysql_close( $ this->$db_conn );
}*/
/*取得客戶的真實IP 位置*/
function getip(){
if(getenv("HTTP_CLIENT_IP" ) && strcasecmp (getenv("HTTP_CLIENT_IP) "), "未知"))
{
$ip = getenv("HTTP_CLIENT_IP");
}
else if (getenv("HTTP_X🎜> }
else if (getenv("HTTP_X_FORWARD_FORca(c getenv("HTTP_X_FORWARDED_FOR") , "未知")){
$ip = getenv("HTTP_X_FORWARDED_FOR");
}
else if (getenv("REMO_DDR" ), "未知") )
{
$ip = getenv("REMOTE_ADDR")
}
else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER[ 'REMOTE_ADDR' ] && strcasecmp($ _SERVER['REMOTE_ADDR'], "未知")){
$ip = $_SERVER['REMOTE_ADDR'];
}
else{
$ip = "未知"
}
return($ip);
}
function show_error($str){
echo "alert ('".$str ." ');history.back(-1);";
}
}
?>
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