PHP实现的构造sql语句类实例

本文实例讲述了PHP实现的构造sql语句类。分享给大家供大家参考，具体如下：

    /**
    * @package Database Class
    * @author injection (mail:injection.mail@gmail.com)
    * @version 1.0
    */
    @ini_set( 'display_errors',0 );
    class DataBase{
     private $mDb_host,$mAb_user,$mAb_pwd,$mConn_No;
     function DataBase( $Conn_Obj ){
     $this->connectDb( $Conn_Obj );
     }
     function connectDb( $Conn_Obj ){
     $this->mDb_host = $Conn_Obj->host;
     $this->mAd_name = $Conn_Obj->user;
     $this->mAd_pwd = $Conn_Obj->pwd;
     $this->mConn_No = mysql_connect( $this->mDb_host, $this->mAd_name, $this->mAd_pwd );
     }
     function selectDb( $Conn_Obj ){
     $this->mDb_name = $Conn_Obj->dbname;
     mysql_select_db( $this->mDb_name );
     }
    }
    /**
    * @package Making Sqls Class exetends Database Class
    * @author injection (mail:injection.mail@gmail.com)
    * @version 1.0
    */
    class MakeSql extends DataBase{
     private $mSql;
     function MakeSql( $type,$arr_colum_list, $arr_sql_choice ){
     $this->MakeSqlType( $arr_colum_list, $arr_sql_choice );
     }
     //switch make list
     function MakeSqlType( $type, $arr_colum_list, $arr_sql_choice ){
     switch( $type ){
     case 'insert':
     return $this->makeInsert( $arr_colum_list, $arr_sql_choice );
     case 'select':
     return $this->makeSelect( $arr_colum_list, $arr_sql_choice );
     case 'update':
     return $this->makeUpdate( $arr_colum_list, $arr_sql_choice );
     case 'delete':
     return $this->makeDelete( $arr_colum_list, $arr_sql_choice );
     }
     }
     //make insert
     function makeInsert( $arr_colum_list,$arr_sql_choice ){
     $colum_key = array_keys( $arr_colum_list );
     $colum_value = array_values( $arr_colum_list );
     $this->mSql = "INSERT INTO ".$arr_sql_choice["tbl_name"]."( ".join( ',' , $colum_key )." ) VALUES( '".join( "','" , $colum_value )."')";
     return $this->mSql;
     }
     //making select
     function makeSelect( $arr_colum_list = '*' , $arr_sql_choice ){
     $colum_value = array_keys( $arr_colum_list );
     foreach( $arr_sql_choice as $sql_key => $sql_value ){
     if( strcmp( $sql_key, 'tbl_name' ) == 0 ){
     if( strcmp($arr_colum_list, '*' ) !== 0 )
      $this->mSql = "SELECT ".join( ',' , $colum_value )." FROM ".$sql_value;
     else
      $this->mSql = "SELECT * FROM ".$sql_value;
     }
     else
     if( strcmp( $sql_value, '' ) !== 0 )
      if(strcmp( $sql_key, 'WHERE' ) === 0 && strcmp( $sql_value, 'colum' ) === 0 ){
      foreach($arr_colum_list As $colum_key => $colum_value )
      $this->mSql .= "$colum_key = '$colum_value' AND ";
      $this->mSql = rtrim( $this->mSql, " AND " );
      }
      else
      $this->mSql .= " $sql_key ".$sql_value;
     }
     return $this->mSql; 
     }
     //making update 
     function makeUpdate( $arr_colum_list, $arr_sql_choice ){
     $this->mSql = "UPDATE ".$arr_sql_choice['tbl_name']." SET ";
     foreach( $arr_colum_list as $colum_key => $colum_value )
     $this->mSql .= "$colum_key = '$colum_value',";
     $this->mSql = rtrim( $this->mSql , ',');
     foreach( $arr_sql_choice as $sql_key => $sql_value ){
     if( strcmp( $sql_value, '' ) !== 0 && strcmp( $sql_key, 'tbl_name' ) !==0 && strcmp( $sql_key, 'ORDER BY' ) !== 0 )
      $this->mSql .= " $sql_key ".$sql_value;
     }
     return $this->mSql;
     }
     //making delete
     function makeDelete( $arr_colum_list, $arr_sql_choice ){
     $this->mSql = "DELETE FROM ".$arr_sql_choice['tbl_name'];
     foreach( $arr_sql_choice as $sql_key => $sql_value ){
     if( strcmp( $sql_key, 'tbl_name' ) !== 0 && strcmp( $sql_value, '' ) !== 0 ){
     $this->mSql .= " $sql_key ".$sql_value;
     }
     }
     return $this->mSql;
     }
    }

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