Construct an SQL statement instance implemented by PHP and construct an SQL statement instance _ PHP Tutorial

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PHP constructs an SQL statement instance and an SQL statement instance. Construct an SQL statement class instance implemented by PHP. This document describes how to construct an SQL statement class implemented by PHP. For your reference, the details are as follows: *** @ packageDa PHP constructs an SQL statement instance and constructs an SQL statement instance

This example describes how to construct an SQL statement class implemented by PHP. We will share this with you for your reference. The details are as follows:

/*** @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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