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;
 }
}

更多关于PHP相关内容感兴趣的读者可查看本站专题:《php+mysql数据库操作入门教程》、《php防止SQL注入方法总结》、《PHP基于pdo操作数据库技巧总结》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。

标签:
PHP,sql语句,sql类,PHP构造sql语句

免责声明:本站文章均来自网站采集或用户投稿,网站不提供任何软件下载或自行开发的软件! 如有用户或公司发现本站内容信息存在侵权行为,请邮件告知! 858582#qq.com
桃源资源网 Design By www.nqtax.com

评论“PHP实现的构造sql语句类实例”

暂无“PHP实现的构造sql语句类实例”评论...

P70系列延期,华为新旗舰将在下月发布

3月20日消息,近期博主@数码闲聊站 透露,原定三月份发布的华为新旗舰P70系列延期发布,预计4月份上市。

而博主@定焦数码 爆料,华为的P70系列在定位上已经超过了Mate60,成为了重要的旗舰系列之一。它肩负着重返影像领域顶尖的使命。那么这次P70会带来哪些令人惊艳的创新呢?

根据目前爆料的消息来看,华为P70系列将推出三个版本,其中P70和P70 Pro采用了三角形的摄像头模组设计,而P70 Art则采用了与上一代P60 Art相似的不规则形状设计。这样的外观是否好看见仁见智,但辨识度绝对拉满。