实例数据库连接类

require_once("Config.inc.php");//系统配置文件

    /*
    $DBHOST="localhost"; //主机名
    $DBUSER="root"; // 数据库用户名
    $DBPWD=""; //密码
    $DBNAME="test" ; //数据库名
    */
    //定义数据库类

    class DataBase
    {
        //定义属性

        var $mConnId;        //连接标识        

        var $mSqlString; //待执行的SQL语句

        var $mResultArray;    //执行Select语句返回的结果数组        

        
        //__construct(),构造函数,建立数据库的连接

        function __construct($pHost,$pUser,$pPwd,$pDbName){            
            $this->mConnId=mysql_connect ($pHost,$pUser,$pPwd);//建立连接

            mysql_select_db($pDbName, $this->mConnId);    //选择数据库

            mysql_query("set names 'gbk'");//设置数据库编码为GBK

        }
        
        //__destruct：析构函数，断开连接

        function __destruct(){
            mysql_close($this->mConnId); //此处还有问题......

        }
        
        //执行SQL语句

        function ExecuteSql(){
            mysql_query($this->mSqlString);
        }
        
        //查询数据，返回值为对象数组，数组中的每一元素为一行记录构成的对象

        function Query(){
            $i=0;
            $query_result=mysql_query($this->mSqlString,$this->mConnId);
            while($row=mysql_fetch_object($query_result)){
                $this->mResultArray[$i++]=$row;
            }
        }
    
    }//class DataBase


    //以下为测试用

    $db=new DataBase($DBHOST,$DBUSER,$DBPWD,$DBNAME);
    $db->mSqlString="update student set phone='123' where id='04261001' ";
    $db->ExecuteSql();
    $db->mSqlString="select * from student where id='04261001' ";
    $db->Query();
    print_r($db->mResultArray);//输出测试结果

    

PHP连接MYSQL数据库类
mysql.php
<?php

Class Dirver{
 

  //连接数据库
  //link database
  function DBLink($dbhost='localhost', $dbuser='root', $password='', $dbname='', $pconnect=0){
    $this->LinkID[$this->Line] = ($pconnect == 1)? @mysql_pconnect($dbhost, $dbuser, $password) : @mysql_connect($dbhost, $dbuser, $password) or die("Connect to MySQL ($dbhost,$dbuser) failed");
    //选择连接数据库
    //choose to link database
    @mysql_select_db($dbname, $this->LinkID[$this->Line]) or die('Cannot use database '.$dbname);
    return $this->LinkID[$this->Line];
  }
 
  //查询语句
  //view qurry
  function query($query,$limit='') {
    $this -> nums ++;
    //检测如果有限制数据集则处理
    //test if there is finite data,then function
    if($limit>0){
      $query = $query.' LIMIT '.$limit;
    }
    $this-> Lists[$this->Line][] = $query;
   
   
    $querys = mysql_query($query,$this->LinkID[$this->Line]);
    if(!$querys){
      $this->DB_Error($query);
    }
    return $querys;
  }
 
  //返回数组资料
  //back to array info
  function fetch_array($query) {
    return @mysql_fetch_array($query, MYSQL_ASSOC);
  }
 
  //返回数组资料
  //back to array info
  function result($query) {
    return @mysql_result($query,$this->LinkID[$this->Line]);
  }
 
  //返回数组资料行
  //back to row info
  function rows($query) {
    return $this->fetch_array($this->query($query));
  }
 
 
  //返回数组行
  //back to numrows
  function nums($query) {
    return $this->num_rows($this->query($query));
  }
 
  //取得返回列的数目
  //fetch the numbers backing out
  function num_rows($query){
    return @mysql_num_rows($query);
  }
 
  //返回单列的各字段
  //return to every field of single row
  function fetch_row($query) {
    return @mysql_fetch_row($query);
  }
 
  //返回最后一次使用 INSERT 指令的 ID
  //return to inserted ID used last time
  function insert_id(){
    return @mysql_insert_id($this->LinkID[$this->Line]);
  }
 
  //关闭当前数据库连接
  //close current database link
  function close(){
    return @mysql_close($this->LinkID[$this->Line]);
  }
 
  //检测mysql版本
  //test mysql version
  function version(){
    $query = @mysql_query("SELECT VERSION()",$this->LinkID[$this->Line]);
    return  @mysql_result($query, 0);
  }
 

  //返回友情提示信息
  //return to kindly note
  function DB_Error_t($query=''){
 
  }
  function DB_Error($query=''){
    global $PHP_SELF;
     
      //出错语句提示
      //error sentence
      $errors = preg_replace("/'(.+?)'/is","&nbsp;'<font color='#8899DF'><b>\1</b></font>'&nbsp;",mysql_error());
     

        $charset ='';
        //提示语言
        //language noted
        $lang = Array('This SQL Error Info!', 'Error Script:', 'Present time:',
              'Http Host:', 'Server Name:', 'Server Software:',
              'Host IP Address:', 'Remote User Agent:', 'Current File:',
              'Current Line:', 'Line.', 'The Error number:',
              'The specific Error was:', 'SQL Query :', 'Not discover whateverly SQL Sentence ！');
        //时间处理
        //time
        $nowdate = date('Y-m-d H:i A');
        $errors = preg_replace("/'(.+?)'/is","'<font color='#8899DF'><b>\1</b></font>'",mysql_error());
     
      //检测是否有语句
      //test if there is any sentence.
      if($query==''){
        $query = $lang[14];
      }
     
      echo "<html>
  <head>
  <meta http-equiv='Content-Type' content='text/html; charset=$charset'>
  <title>$lang[0]</title>
  </head>
  <body>
  </body>
  </html>
  <table style='BORDER-COLLAPSE: collapse;font-size:9pt;' borderColor='#a8b7c6' cellSpacing='1' width='100%' border='1' cellpadding='3' align='center'>
          <tr>
            <td bgColor='#F9F9F9' height='38' colspan='2'>
            <font size='4' face='Arial' color='#800000'>$lang[0]</font></td>
          </tr>
          <tr>
            <td bgColor='#F9F9F9' width='165'>
            <p align='right'>$lang[2]</td>
            <td bgColor='#F9F9F9'>$nowdate</td>
          </tr>
          <tr>
            <td bgColor='#F9F9F9' width='165'>
            <p align='right'>$lang[3]</td>
            <td bgColor='#F9F9F9'><b>".$_SERVER['HTTP_HOST']."</b></td>
          </tr>
          <tr>
            <td bgColor='#F9F9F9' width='165'>
            <p align='right'>$lang[4]</td>
            <td bgColor='#F9F9F9'>".$_SERVER['SERVER_NAME']."</td>
          </tr>
          <tr>
            <td bgColor='#F9F9F9' width='165'>
            <p align='right'>$lang[5]</td>
            <td bgColor='#F9F9F9'>".$_SERVER['SERVER_SOFTWARE']."</td>
          </tr>
          <tr>
            <td bgColor='#F9F9F9' width='165'>
            <p align='right'>$lang[6]</td>
            <td bgColor='#F9F9F9'><font color="#800000">".$_SERVER['REMOTE_ADDR']."</font></td>
          </tr>
          <tr>
            <td bgColor='#F9F9F9' width='165'>
            <p align='right'>$lang[7]</td>
            <td bgColor='#F9F9F9'><font color="#000080">".$_SERVER['HTTP_USER_AGENT'].";</font></td>
          </tr>
          <tr>
            <td bgColor='#F9F9F9' width='165'>
            <p align='right'>$lang[11]</td>
            <td bgColor='#F9F9F9'><b>".mysql_errno()."</b></td>
          </tr>
          <tr>
            <td bgColor='#F9F9F9' width='165'>
            <p align='right'>$lang[12]</td>
            <td bgColor='#F9F9F9'>$errors</td>
          </tr>
          <tr>
            <td bgColor='#F9F9F9' width='165'>
            <p align='right'>$lang[13]</td>
            <td bgColor='#F9F9F9'>$query</td>
          </tr>
        </table>
          </td>
        </tr>
      </table>";
    exit;
  }

}
?>

1. <?php   
2. dd = new LampDb('localhost','root','2184237','note','utf8');   
3. $sql = "select * from mynote";   
4. $handle = $dd->query($sql);   
5. $aa = $dd->fetchOneRow($handle);   
6. print_r($aa);   
7. echo "<hr />";   
8. $ddd = $dd->fetchRows($handle);   
9. for ($n=0; $n < count($ddd); $n++){   
10. echo $ddd[$n]['id'] . "标题" . $ddd[$n]['subject'];   
11. echo "<br />";   
12. }   
13. echo "<hr />";   
14. echo "nums=" . $dd->fetchRowNums($handle);   
15. ?>  
16.  
17. php   
18. class LampDb   
19. {   
20. private $conn;   
21. //连接数据库   
22. function __construct($host,$user,$pass,$dbname,$charset)   
23. {   
24.   $this->conn = mysql_connect($host,$user,$pass);   
25.   mysql_query('set names $charset');   
26.   $db = mysql_select_db($dbname,$this->conn);   
27. }   
28. //查询语句   
29. function query($sql)   
30. {   
31.   $handle = mysql_query($sql,$this->conn);   
32.   return $handle;   
33. }   
34. //查询一条记录   
35. function fetchOneRow($handle)   
36. {   
37.   $aa = mysql_fetch_assoc($handle);   
38.   return $aa;   
39. }   
40. //查询多条记录   
41. function fetchRows($handle,$i=0)   
42. {   
43.   while($bb = mysql_fetch_assoc($handle)){   
44.    $bbb[$i] = $bb;   
45.    $i++;   
46.   }   
47.   return $bbb;   
48. }   
49. //获取一个查询语句返回的记录数   
50. function fetchRowNums($handle)   
51. {   
52.   //$handle = $this->query($sql);   
53.   $num = mysql_num_rows($handle);   
54.   return $num;   
55. }   
56. }   
57. ?>  

php 批量删除文件
 elseif($doing == 'delfiles') {
  if ($dl) {
   $dfiles='';
   $succ = $fail = 0;
   foreach ($dl as $filepath => $value) {
    if (@unlink($filepath)) {
     $succ++;
    } else {
     $fail++;
    }
   }
   m('删除文件 '.count($dl).' 成功 '.$succ.' 失败 '.$fail);
  } else {
   m('请选择文件');
  }

php 删除，创建目录
 // 判断读写情况
 $dir_writeable = @is_writable($nowpath) ? 'Writable' : 'Non-writable';

 // 删除目录
 if ($doing == 'deldir' && $thefile) {
  if (!file_exists($thefile)) {
   m($thefile.' 目录不存在');
  } else {
   m('目录删除 '.(deltree($thefile) ? basename($thefile).' 成功' : '失败'));
  }
 }

 // 创建目录
 elseif ($newdirname) {
  $mkdirs = $nowpath.$newdirname;
  if (file_exists($mkdirs)) {
   m('目录已经存在了');
  } else {
   m('创建目录 '.(@mkdir($mkdirs,0777) ? '成功' : '失败'));
   @chmod($mkdirs,0777);
  }
 }