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》
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