php实现mysql数据库操作类分享_PHP教程-tutorial php-php.cn

复制代码代码如下:

/*
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 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

";
$PageHtml .= '' . $this->PageCount . '条记录 ' . $this->PageNo . '/' . $this->PageNum . '页 ';
$this->PageNo 首页\nPageNo - 1) . "\">上一页\n";
if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); }
$this->PageNo >= $this->PageNum or $PageHtml .= "PageNo + 1) . "\">下一页\nPageNum . "\">尾页\n";
$PageHtml .= "

\n";
return $PageHtml;
   }

   private function NumPage( $Can = '' ) { //数字分页
    $NumHtml = '';
    $First   = 1;
    $Last    = $this->PageNum;
    if ( $this->PageNum > 5 ) {
     if ( $this->PageNo PageNum ) {
     $First = $this->PageNo - 2;
     $Last = $this->PageNo + 2;
     }else{
     $First = $this->PageNo - 4;
     $Last = $this->PageNum;
     }
    }
    if ( $First     if ( $Last > $this->PageNum ) { $First   = $this->PageNum - 4; $Last = $this->PageNum;}
    for( $i = $First; $i      $NumHtml .= $this->PageNo != $i ? "\n\t" . '' . $i . '' . "\n\t" : "\n\t" .'' . $i . '' . "\n\t";
    }
    unset($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

\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 '';
    echo '';
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]);

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。