软件开发培训班 >> 编程开发 >> PHP

php实现mysql数据库操作类分享

　　本文标签：mysql数据库操作

复制代码代码如下:

<?php
/*
数据库操作类
*/
class Mysql{
private $LocalHost = localhost;
private $LoaclUser = root;
private $LocalPass = 123456;
private $LocalBase = jiangxibaiyi;
private $LocalCode = UTF8;
private $PreFix;
private $Conn;
private $Start     = 0;
private $Error     = false; //数据库连接状态, false表示未连接或连接不正常
public $Err       = true; //Sql执行结果

private $Table;
private $Field     = *;
private $Where     = ;
private $Order     = ;

private $PageSize = 0; //分页显示->每页多少条，0为不分页显示
private $PageCount = 1; //分页显示->总共有多少条
private $PageNum   = 1; //分页显示->总共有多少页
private $PageNo    = 1; //分页显示->当前第几页
private $PageKey   = page; //分页url参数键
private $PageStart = 0; //分页显示->当前从第几条开始返回

private $Select;
private $Rest;

private $Result    = false;//结果集

public $FormArray = array();

public $Instr_ID = 0;
private $j = 0;

public function Parameter($Loca, $Root, $Pass, $Base, $Code, $PreFix = ){
  $this->LoaclUser = $Root;
  $this->LocalBase = $Base;
  $this->LocalCode = $Code;
  $this->LocalHost = $Loca;
  $this->LocalPass = $Pass;
  $this->PreFix    = $PreFix;
  return $this;
}
private function Connection( $Sql ){
  !function_exists(mysqli_connect) ? die(查询失败，无法加载mysqli扩展) : null;
  $this->Conn = @new mysqli( $this->LocalHost, $this->LoaclUser, $this->LocalPass, $this->LocalBase);
  $this->Error = mysqli_connect_errno() == 0 ? true : false;
  !$this->Error ? die(数据库连接错误，请检查数据库连接参数) : null;
  $this->Conn->query(SET NAMES . $this->LocalCode);
  $this->Rest = $this->Conn->query($Sql);
  $this->Err = mysqli_error($this->Conn);
  $this->Instr_ID = mysqli_insert_id($this->Conn);
  $this->Rest->free_result;
  $this->Conn->close;
  $this -> FormArray = ;
  return $this;
}

public function null(){
  $this->PageSize = 0;
  //$this->PageCount = 1;
  $this->PageStart = 1;
  $this->Field     = * ;
     $this->Select    = ;
  unset($this->Table, $this->Where,$this->Order, $this->Result);
}

public function Table( $TableName ) {//数据表
   $this -> null();
   $this->Table = ` . $this->PreFix . $TableName . `;
   return $this;
}

public function Field( $Array = * ) {//数据字段
   !empty( $this->Field ) ? $this->Field = : null;
   $Array = explode(,, $Array);
   foreach ( $Array as $field ) {
   $this->Field .= !$this->Start ? ` . $field . ` : , ` . $field . `;
   $this->Start++;
   }
   $this->Start = 0;
   return $this;
}

public function Where( $Where ) {//条件
       $this->Where = where .$Where;
    return $this;
}

public function Order( $Order ) {//排序
   $this->Order = order by . $Order;
   return $this;
}

public function pk( $key ) {//分页url参数键
   $this->PageKey = $key;
   return $this;
}

public function Page( $PageSize ) {//分页
   $this->PageSize = $PageSize;
   $this->PageNo   = $this->get( $this->PageKey );
   $this->PageNo   = empty( $this->PageNo ) || !isset( $this->PageNo ) || !is_numeric( $this->PageNo ) || $this->PageNo < 1 ? 1 : $this->PageNo;
   return $this;
}

public function post( $Key, $Filter = true ){
  return $Filter ? strip_tags($_POST[$Key]) : $_POST[$Key];
}

public function get( $Key, $Filter = true ){
  return $Filter ? strip_tags($_GET[$Key]) : $_GET[$Key];
}

public function Sel(){
  $this->Select = Select . $this->Field . from . $this->Table . $this->Where . $this->Order;
  $this->Connection( $this->Select );
  if ( $this->Rest->num_rows ) {
   while ( $Rs = $this->Rest->fetch_assoc() ) {
     $this->Result[] = $Rs;
    }
  }
    $DataBase = $this->Result;
    return empty($DataBase) ? false : $DataBase;
}

public function querys( $Sql = , $Type = not, $biao = false ) {
  $this->Select = $Sql;
  $this->Connection( $this->Select );
  if ( $this->Rest->num_rows ) {
     if ( !$biao ) {
   while ( $Rs = $this->Rest->fetch_array() ) {
     $this->Result[] = !preg_match(/^\d+$/i, $Type) ? $Rs : $Rs[ $Type ];
    }
  } else {
   while ( $Rs = $this->Rest->fetch_assoc() ) {
     $this->Result[] = $Rs;
    }
  }
  }
    $DataBase = $this->Result;
    return empty($DataBase) ? false : $DataBase;

}

public function executes( $Sql = ){
  $this->Connection( $Sql );
  return $this->Rest;
}

public function exists( $T = , $F = , $W = ){
  if ( empty( $F ) ) { return 0; }
  $cmd = empty( $W ) ? Select sum( . $F . ) as `baiyinum` from ` . $this->PreFix . $T .` : Select sum( . $F . ) as `baiyinum` from ` . $this->PreFix . $T .` Where . $W;
        $this->Connection( $cmd );
  unset( $T, $F, $W, $cmd );
  $Rel = $this->Rest->fetch_array();
  return round( $Rel[baiyinum], 2 );
}

public function ExistsTo( $Bili = 10000, $T = , $F = , $W = ){
  if ( empty( $F ) ) { return 0; }
  $cmd = empty( $W ) ? Select sum( . $F . ) as `baiyinum` from ` . $this->PreFix . $T .` : Select sum( . $F . ) as `baiyinum` from ` . $this->PreFix . $T .` Where . $W;
        $this->Connection( $cmd );
  unset( $T, $F, $W, $cmd );
  $Rel = $this->Rest->fetch_array();
  return round( $Rel[baiyinum] * $Bili );
}

public function Select( $Type = true, $ListNum = 1 ){ //返回记录（数组形式，返回条数）
   $this->Select = Select . $this->Field . from . $this->Table . $this->Where . $this->Order;
   if ( is_numeric( $ListNum ) ) {
  if ( $this->PageSize > 0 ) {
   $this->Connection( $this->Select );//执行查询
   $this->PageCount = $this->Rest->num_rows;//取得记录总数
   $this->PageNum   = ceil($this->PageCount / $this->PageSize); //总共有多少页
   $this->PageNo    = $this->PageNo > $this->PageNum ? $this->PageNum : $this->PageNo;
   $this->PageStart = ( $this->PageNo - 1 ) * $this->PageSize;   //当前从第几条开始返回
   $this->Select   .= limit . $this->PageStart . , .$this->PageSize; //重新构造sql语句
  } else {
   $this->Select   .= limit . $ListNum; //重新构造sql语句
  }
   } else {
   $this->Select   .= limit 1; //重新构造sql语句
   }
   //echo $this->Select;
   $this->Connection( $this->Select );//再次执行查询
   if ( $this->Rest->num_rows ) {//如果记录存在
  if ( $Type ) {
    while ( $Rs = $this->Rest->fetch_array() ) {
     $this->Result[] = $Rs;
    }
  }else{
    while ( $Rs = $this->Rest->fetch_assoc() ) {
     $this->Result[] = $Rs;
    }
  }
   }
   if ( ( $ListNum == 1 or !is_numeric( $ListNum ) ) && !$this->PageSize) { $this->Result = $this->Result[0]; }
   $DataBase = $this->Result;
   return empty($DataBase) ? false : $DataBase;
}

   public function Num() { //返回记录总数
     $this->Select = Select . $this->Field . from . $this->Table . $this->Where . $this->Order;
$this->Connection( $this->Select );//执行查询
return $this->Rest->num_rows;//取得记录总数
   }

   public function PageNav($NumNav = false ) { //分页
$Action = $this -> get(action);
!empty( $Action ) or $Action = index;
$Module = $this -> get(module);
!empty( $Module ) or $Module = index;
$NavUrl   = / . $Module . / . $Action . / . $this -> PageKey ./;
$NaIndex = / . $Module . / . $Action;
$PageHtml = "\n<div class=\"pagenav\">";
$PageHtml .= <span> . $this->PageCount . 条记录        . $this->PageNo . / . $this->PageNum . 页</span>            ;
$this->PageNo <= 1 or $PageHtml .= "<a href=\"" . $NaIndex . "\">首页</a>\n<a href=\"" . $NavUrl . ($this->PageNo - 1) . "\">上一页</a>\n";
if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); }
$this->PageNo >= $this->PageNum or $PageHtml .= "<a href=\"" . $NavUrl. ($this->PageNo + 1) . "\">下一页</a>\n<a href=\"" . $NavUrl . $this->PageNum . "\">尾页</a>\n";
$PageHtml .= "</div>\n";
return $PageHtml;
   }

   private function NumPage( $Can = ) { //数字分页
    $NumHtml = ;
    $First   = 1;
    $Last    = $this->PageNum;
    if ( $this->PageNum > 5 ) {
     if ( $this->PageNo < $this->PageNum ) {
     $First = $this->PageNo - 2;
     $Last = $this->PageNo + 2;
     }else{
     $First = $this->PageNo - 4;
     $Last = $this->PageNum;
     }
    }
    if ( $First < 1 ) { $First   = 1; $Last = $First + 4;}
    if ( $Last > $this->PageNum ) { $First   = $this->PageNum - 4; $Last = $this->PageNum;}
    for( $i = $First; $i <= $Last; $i++) {
     $NumHtml .= $this->PageNo != $i ? "\n\t" . <a href=" . $Can . $i . "> . $i . </a> . "\n\t" : "\n\t" .<a class="hover" disabled="disabled"> . $i . </a> . "\n\t";
    }
    unset($Can, $First, $i, $Last);
    return $NumHtml;
   }

   public function UserPage($NumNav = false, $PageName = index, $Mulu = user ) { //会员中心分页
     $NavUrl   = / . $Mulu . / . $PageName . / . $this->PageKey . /;
$PageHtml = "\n<div class=\"pagenav\">";
$PageHtml .= <span> . $this->PageCount . 条记录        . $this->PageNo . / . $this->PageNum . 页</span>            ;
$this->PageNo <= 1 or $PageHtml .= "<a href=\"" . $NavUrl . "1\">首页</a>\n<a href=\"" . $NavUrl . ($this->PageNo - 1) . "\">上一页</a>\n";
if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); }
$this->PageNo >= $this->PageNum or $PageHtml .= "<a href=\"" . $NavUrl. ($this->PageNo + 1) . "\">下一页</a>\n<a href=\"" . $NavUrl . $this->PageNum . "\">尾页</a>\n";
$PageHtml .= "</div><div class=\"clear\"></div>\n";
return $PageHtml;
   }


   //表单处理开始

//判断表单时候提交
public function FormIs( $Keys = mm ) {
  return $_POST[ $Keys ] == 1 ? true : false;
}

//post方式获取数据
public function _post( $Keys = , $TiHuan = ) {
  $Values = strip_tags( $_POST[ $Keys ] );
  $this->FormArray[$Keys] = empty( $Values ) ? $TiHuan : $Values;
        return empty( $Values ) ? $TiHuan : $Values;
}

//get方法获取数据
public function _get( $Keys = , $TiHuan = ) {
  $Values = strip_tags( $_GET[ $Keys ] );
        return empty( $Values ) ? $TiHuan : $Values;
}

//判断是否为数字并且不小于0
public function IsNum( $Num = 0, $Mesg = 参数必须为数字 ) {
  if ( is_numeric( $Num ) && !empty( $Num ) && $Num >= 0 ) {
   return $Num;
  }else{
   die( $Mesg );
  }
}

//判断是否为数字并且不小于0返回True/False
public function NumBer( $Num = 0) {
   return is_numeric( $Num ) && !empty( $Num ) && $Num >= 0 ? true : false;
}

//检测相关数据似乎存在
public function IsData($Types = true, $memg = 数据已经存在 ){
  $this->Connection(select . $this->Field . from . $this->Table . $this->Where);
  if ( $Types ){
   $this->Rest->num_rows > 0 ? die( $memg ) : null;
  } else {
   return $this->Rest->num_rows;
  }
}

//写入数据库记录
public function into( $Mesg = ){
  !is_array( $this->FormArray ) ? die( $Mesg ) : null;
  $Sql = insert into . $this->Table . (`;
  $I   = 0;
  foreach ( $this->FormArray as $Key => $Val ){
   $Duan .= !$I ? $Key . ` : , ` . $Key . `;
   if ( is_numeric( $Val ) ){
    $Vals .= !$I ? $Val : , . $Val;
   }else{
    $Vals .= !$I ? \ . $Val . \ : , \ . $Val . \;
   }
   $I++;
  }
  $Sql .= $Duan . ) values ( . $Vals . );

  //@file_put_contents(1.sql, $Sql, FILE_APPEND);

  $this->Connection( $Sql );
  return !empty( $this->Err ) ? false : true;
}

   //数组形式写入数据
   public function MsgBox( $Table = , $Filed = array() ) {
    $this -> Table($Table);
    foreach( $Filed as $Key => $Val ) {
    $this -> FormArray[ $Key ] = $Val;
    }
   return $this -> Into(未取得数据);
   }

   //修改数据库记录
   public function Edit( $Array = array() ) {
    if ( empty( $Array ) ) { $Array = $this -> FormArray; }
    if ( !is_array( $Array ) || empty( $Array ) ) {
     return false;
    } else {
       $Sql = update . $this -> Table . set ;
    $I   = 0;
    $Sub = ;
    $Huan = array(- => [jian], + => [jia], * => [cheng], / => [chu]);
    $Zhan = array([jian] => -, [jia] => +, [cheng] => *, [chu] => /);

foreach ( $Array as $Files => $Val ) {
     $Val = !is_numeric( $Val ) && !preg_match(/\`\w+\`\s*(\+|\-|\*|\/)/i, $Val) ? \ . $Val . \ : $Val;
     foreach ( $Huan as $key => $val ){
      $Val = str_replace($key, $val, $Val);
     }
     $duan = !$I ? ` . $Files . ` = : , ` . $Files . ` = ;
     $Sub .= $duan . $Val;
     $I++;
    }
    $Sql .= $Sub . $this -> Where;
    foreach ( $Zhan as $Fan => $Hui ) {
     $Sql = str_replace($Fan, $Hui, $Sql);
    }

    //echo $Sql; die;

    $this -> Connection( $Sql );
    unset( $Array, $duan, $Fan, $Files, $Huan, $Hui, $I, $key, $Sql, $Sub, $Val, $Zhan, $val );
    return !empty( $this -> Err ) ? false : true;
   }
   }

   //删除数据库记录
   public function del(){
    $Sql = delete from . $this->Table . $this->Where;
    $this->Connection( $Sql );
    unset($Sql);
    return !empty( $this->Err ) ? false : true;
   }

   //表单处理结束

   //页面跳转
   public function Msg( $Text = 操作成功 ) {
    echo <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />;
    echo <script type="text/javascript">

</script>;
exit;
   }

   #取得系统当前时间
   public function Times(){
    return str_replace(-, [jian], date(Y-m-d H:i:s));
   }

   #取得用户IP地址
public 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);
}


   //最后关闭数据库连接
   public function Close(){
    !is_object( $this -> Conn ) or mysqli_close( $this -> Conn );
   }

}

使用方法：
声明数据库对象
$Conn = new Mysql;
加载数据库参数
$Conn->Parameter(数据库服务器, 数据库用户名, 数据库密码, 数据库名称, 数据库编码, 数据库表前缀[可为空]);

阿里为什么撤回菜鸟 IPO？	华为新款MateBook E二合一笔记本外观曝光
视频行业前传：陈天桥、贾跃亭、李善友的恩怨简史	什么事决定seo排名命运的四点

上面的代码就已经加载这个类文件进来了，并且初始化了一些数据库连接参数！

下面介绍几个基本是方法函数：
1、 $Conn -> Table();
选择数据表，参数是数据表名称
2、$Conn -> Field();
选择的字段名称，多个用逗号隔开，如不调用这个方法，则返回全部
3、$Conn -> Where();
Sql Where子语句，根据条件筛选
4、$Conn -> Order();
Sql 排序
5、$Conn -> Page(int);
参数是一个正整数数字，如调用这个方法，记录将分页显示
6、$Conn -> Select(布尔值);
执行查询，返回查询结果，如果有，则是一个二维数组，如果无，则返回假，参数可省略，如省略，默认为真，返回的数组包含数字元素
7、$Conn -> Del();
删除记录
8、 $Conn -> Edit(array());
修改记录，参数是一个一维数组，数组键是字段名称，数组值是字段值
9、$Conn -> Into(array());
添加记录，参数是一个一维数组，数组键是字段名称，数组值是字段值。

以上方法可连续调用，比如：

复制代码代码如下:

$Rult = $Conn -> Table(user) -> Select(); //查询返回user表的所有记录
$Rult = $Conn -> Table(user) -> Page(20) -> Select();//查询返回user表的所有记录，并分页显示，每页20条；

让你电脑中固态硬盘速度起飞 90%都不知道这个设置	一亿粉丝苦等李子柒
绝地反击！华为启动神秘的“南泥湾”项目	行走中捕捉风景教你将城市风光拍出特色

技术文章快速查找

案例分析PHP数组查询

PHP4中的COM函数探讨

使用纯php代码实现页面伪静态的方法

CI框架学习笔记（一） - 环境安装、基本术语和框架流程

相关下载

在线教程导航

软件应用
·Windows8	·Windows7	·Word
·Excel	·PPT	·WPS
Web开发
·ASP	·JavaScript	·DIV+CSS
·JSP	·VbScript	·XML
·PHP
开发语言
·VB	·VC	·ASP.NET
·Java	·C++	·Delphi
数据库开发
·MySQL	·MsSQL	·Access
·Oracle	·DB2
手机系统
·Android	·iOS	·WindowsPhone
网站设计
·Flash	·Dreamweaver	·Fireworks
平面设计
·Photoshop	·CorelDraw	·AutoCAD
·3DsMAX	·Illustrator
网络技术
·网站运营	·网络安全	·网络搭建