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The author:(作者)归海一刀published in(发表于) 2014/2/17 7:32:15 PHP实例:PHP通过参数来生成MYSQL语句类_[PHP教程]
这个类可以通过具有参数的数组来构建MySQL查询语句。 这个类可以通过指定的表和字段参数创建SELECT ,INSERT , UPDATE 和 DELETE 语句。 这个类可以创建SQL语句的WHERE条件,像LIKE的查询语句,使用LEFT JOIN和ORDER 语句。 例子:
php /* ******************************************************************* Example file This example shows how to use the MyLibSQLGen class The example is based on the following MySQL table: CREATE TABLE customer ( id int(10) unsigned NOT NULL auto_increment, name varchar(60) NOT NULL default '', address varchar(60) NOT NULL default '', city varchar(60) NOT NULL default '', PRIMARY KEY (cust_id) ) TYPE=MyISAM; ******************************************************************* */ require_once ( " class_mylib_SQLGen-1.0.php " ); fields = Array ( " name " , " address " , " city " ); values = Array ( " Fadjar " , " Resultmang Raya Street " , " Jakarta " ); tables = Array ( " customer " ); echo " Result Generate Insert" ; object = new MyLibSQLGen(); object -> clear_all_assign(); // to refresh all property but it no need when first time execute object -> setFields( fields ); object -> setValues( values ); object -> setTables( tables ); if ( ! object -> getInsertSQL()){ echo object -> Error; exit ;} else { sql = object -> Result; echo sql . " " ;} echo " Result Generate Update" ; fields = Array ( " name " , " address " , " city " ); values = Array ( " Fadjar " , " Resultmang Raya Street " , " Jakarta " ); tables = Array ( " customer " ); id = 1 ; conditions [ 0 ][ " condition " ] = " id='id' " ; conditions [ 0 ][ " connection " ] = "" ; object -> clear_all_assign(); object -> setFields( fields ); object -> setValues( values ); object -> setTables( tables ); object -> setConditions( conditions ); if ( ! object -> getUpdateSQL()){ echo object -> Error; exit ;} else { sql = object -> Result; echo sql . " " ;} echo " Result Generate Delete" ; tables = Array ( " customer " ); conditions [ 0 ][ " condition " ] = " id='1' " ; conditions [ 0 ][ " connection " ] = " OR " ; conditions [ 1 ][ " condition " ] = " id='2' " ; conditions [ 1 ][ " connection " ] = " OR " ; conditions [ 2 ][ " condition " ] = " id='4' " ; conditions [ 2 ][ " connection " ] = "" ; object -> clear_all_assign(); object -> setTables( tables ); object -> setConditions( conditions ); if ( ! object -> getDeleteSQL()){ echo object -> Error; exit ;} else { sql = object -> Result; echo sql . " " ;} echo " Result Generate List" ; fields = Array ( " id " , " name " , " address " , " city " ); tables = Array ( " customer " ); id = 1 ; conditions [ 0 ][ " condition " ] = " id='id' " ; conditions [ 0 ][ " connection " ] = "" ; object -> clear_all_assign(); object -> setFields( fields ); object -> setTables( tables ); object -> setConditions( conditions ); if ( ! object -> getQuerySQL()){ echo object -> Error; exit ;} else { sql = object -> Result; echo sql . " " ;} echo " Result Generate List with search on all fields" ; fields = Array ( " id " , " name " , " address " , " city " ); tables = Array ( " customer " ); id = 1 ; search = " Fadjar Nurswanto " ; object -> clear_all_assign(); object -> setFields( fields ); object -> setTables( tables ); object -> setSearch( search ); if ( ! object -> getQuerySQL()){ echo object -> Error; exit ;} else { sql = object -> Result; echo sql . " " ;} echo " Result Generate List with search on some fields" ; fields = Array ( " id " , " name " , " address " , " city " ); tables = Array ( " customer " ); id = 1 ; search = Array ( " name " => " Fadjar Nurswanto " , " address " => " Tomang Raya " ); object -> clear_all_assign(); object -> setFields( fields ); object -> setTables( tables ); object -> setSearch( search ); if ( ! object -> getQuerySQL()){ echo object -> Error; exit ;} else { sql = object -> Result; echo sql . " " ;} ?> 类代码: php /* Created By : Fadjar Nurswanto <fajr_n@rindudendam.net> DATE : 2006-08-02 PRODUCTNAME : class MyLibSQLGen PRODUCTVERSION : 1.0.0 DESCRIPTION : class yang berfungsi untuk menggenerate SQL DENPENCIES : */ class MyLibSQLGen { var Result ; var Tables = Array (); var Values = Array (); var Fields = Array (); var Conditions = Array (); var Condition ; var LeftJoin = Array (); var Search ; var Sort = " ASC " ; var Order ; var Error ; function MyLibSQLGen(){} function BuildCondition() { funct = " BuildCondition " ; className = get_class ( this ); conditions = this -> getConditions(); if ( ! conditions ){ this -> dbgDone( funct ); return true ;} if ( ! is_array ( conditions )) { this -> Error = " className::funct \nVariable conditions not Array " ; return ; } for ( i = 0 ; i < count ( conditions ); i ++ ) { this -> Condition .= conditions [ i ][ " condition " ] . " " . conditions [ i ][ " connection " ] . " " ; } return true ; } function BuildLeftJoin() { funct = " BuildLeftJoin " ; className = get_class ( this ); if ( ! this -> getLeftJoin()){ this -> Error = " className::funct \nProperty LeftJoin was empty " ; return ;} LeftJoinVars = this -> getLeftJoin(); hasil = false ; foreach ( LeftJoinVars as LeftJoinVar ) { @ hasil .= " LEFT JOIN " . LeftJoinVar [ " table " ]; foreach ( LeftJoinVar [ " on " ] as var ) { @ condvar .= var [ " condition " ] . " " . var [ " connection " ] . " " ; } hasil .= " ON ( " . condvar . " ) " ; unset ( condvar ); } this -> ResultLeftJoin = hasil ; return true ; } function BuildOrder() { funct = " BuildOrder " ; className = get_class ( this ); if ( ! this -> getOrder()){ this -> Error = " className::funct \nProperty Order was empty " ; return ;} if ( ! this -> getFields()){ this -> Error = " className::funct \nProperty Fields was empty " ; return ;} Fields = this -> getFields(); Orders = this -> getOrder(); if ( ereg ( " , " , Orders )){ Orders = explode ( " , " , Order );} if ( ! is_array ( Orders )){ Orders = Array ( Orders );} foreach ( Orders as Order ) { if ( ! is_numeric ( Order )){ this -> Error = " className::funct \nProperty Order not Numeric " ; return ;} if ( Order > count ( this -> Fields)){ this -> Error = " className::funct \nMax value of property Sort is " . count ( this -> Fields); return ;} @ xorder .= Fields [ Order ] . " , " ; } this -> ResultOrder = " ORDER BY " . substr ( xorder , 0 ,- 1 ); return true ; } function BuildSearch() { funct = " BuildSearch " ; className = get_class ( this ); if ( ! this -> getSearch()){ this -> Error = " className::funct \nProperty Search was empty " ; return ;} if ( ! this -> getFields()){ this -> Error = " className::funct \nProperty Fields was empty " ; return ;} Fields = this -> getFields(); xvalue = this -> getSearch(); if ( is_array ( xvalue )) { foreach ( Fields as field ) { if (@ xvalue [ field ]) { Values = explode ( " " , xvalue [ field ]); foreach ( Values as Value ) { @ hasil .= field . " LIKE '% " . Value . " %' OR " ; } if ( hasil ) { @ hasil_final .= " ( " . substr ( hasil , 0 ,- 4 ) . " ) AND " ; unset ( hasil ); } } } hasil = hasil_final ; } else { foreach ( Fields as field ) { Values = explode ( " " , xvalue ); foreach ( Values as Value ) { @ hasil .= field . " LIKE '% " . Value . " %' OR " ; } } } this -> ResultSearch = substr ( hasil , 0 ,- 4 ); return true ; } function clear_all_assign() { this -> Result = null ; this -> ResultSearch = null ; this -> ResultLeftJoin = null ; this -> Result = null ; this -> Tables = Array (); this -> Values = Array (); this -> Fields = Array (); this -> Conditions = Array (); this -> Condition = null ; this -> LeftJoin = Array (); this -> Sort = " ASC " ; this -> Order = null ; this -> Search = null ; this -> fieldSQL = null ; this -> valueSQL = null ; this -> partSQL = null ; this -> Error = null ; return true ; } function CombineFieldValue( manual = false ) { funct = " CombineFieldsPostVar " ; className = get_class ( this ); fields = this -> getFields(); values = this -> getValues(); if ( ! is_array ( fields )) { this -> Error = " className::funct \nVariable fields not Array " ; return ; } if ( ! is_array ( values )) { this -> Error = " className::funct \nVariable values not Array " ; return ; } if ( count ( fields ) != count ( values )) { this -> Error = " className::funct \nCount of fields and values not match " ; return ; } for ( i = 0 ; i < count ( fields ); i ++ ) { @ this -> fieldSQL .= fields [ i ] . " , " ; if ( fields [ i ] == " pwd " || fields [ i ] == " password " || fields [ i ] == " pwd " ) { @ this -> valueSQL .= " password(' " . values [ i ] . " '), " ; @ this -> partSQL .= fields [ i ] . " =password(' " . values [ i ] . " '), " ; } else { if ( is_numeric ( values [ i ])) { @ this -> valueSQL .= values [ i ] . " , " ; @ this -> partSQL .= fields [ i ] . " = " . values [ i ] . " , " ; } else { @ this -> valueSQL .= " ' " . values [ i ] . " ', " ; @ this -> partSQL .= fields [ i ] . " =' " . values [ i ] . " ', " ; } } } this -> fieldSQL = substr ( this -> fieldSQL , 0 ,- 1 ); this -> valueSQL = substr ( this -> valueSQL , 0 ,- 1 ); this -> partSQL = substr ( this -> partSQL , 0 ,- 1 ); return true ; } function getDeleteSQL() { funct = " getDeleteSQL " ; className = get_class ( this ); Tables = this -> getTables(); if ( ! Tables || ! count ( Tables )) { this -> dbgFailed( funct ); this -> Error = " className::funct \nTable was empty " ; return ; } for ( i = 0 ; i < count ( Tables ); i ++ ) { @ Table .= Tables [ i ] . " , " ; } Table = substr ( Table , 0 ,- 1 ); sql = " DELETE FROM " . Table ; if ( this -> getConditions()) { if ( ! this -> BuildCondition()){ this -> dbgFailed( funct ); return ;} sql .= " WHERE " . this -> getCondition(); } this -> Result = sql ; return true ; } function getInsertSQL() { funct = " getInsertSQL " ; className = get_class ( this ); if ( ! this -> getValues()){ this -> Error = " className::funct \nProperty Values was empty " ; return ;} if ( ! this -> getFields()){ this -> Error = " className::funct \nProperty Fields was empty " ; return ;} if ( ! this -> getTables()){ this -> Error = " className::funct \nProperty Tables was empty " ; return ;} if ( ! this -> CombineFieldValue()){ this -> dbgFailed( funct ); return ;} Tables = this -> getTables(); sql = " INSERT INTO " . Tables [ 0 ] . " ( " . this -> fieldSQL . " ) VALUES ( " . this -> valueSQL . " ) " ; this -> Result = sql ; return true ; } function getUpdateSQL() { funct = " getUpdateSQL " ; className = get_class ( this ); if ( ! this -> getValues()){ this -> Error = " className::funct \nProperty Values was empty " ; return ;} if ( ! this -> getFields()){ this -> Error = " className::funct \nProperty Fields was empty " ; return ;} if ( ! this -> getTables()){ this -> Error = " className::funct \nProperty Tables was empty " ; return ;} if ( ! this -> CombineFieldValue()){ this -> dbgFailed( funct ); return ;} if ( ! this -> BuildCondition()){ this -> dbgFailed( funct ); return ;} Tables = this -> getTables(); sql = " UPDATE " . Tables [ 0 ] . " SET " . this -> partSQL . " WHERE " . this -> getCondition(); this -> Result = sql ; return true ; } function getQuerySQL() { funct = " getQuerySQL " ; className = get_class ( this ); if ( ! this -> getFields()){ this -> Error = " className::funct \nProperty Fields was empty " ; return ;} if ( ! this -> getTables()){ this -> Error = " className::funct \nProperty Tables was empty " ; return ;} Fields = this -> getFields(); Tables = this -> getTables(); foreach ( Fields as Field ){@ sql_raw .= Field . " , " ;} foreach ( Tables as Table ){@ sql_table .= Table . " , " ;} this -> Result = " SELECT " . substr ( sql_raw , 0 ,- 1 ) . " FROM " . substr ( sql_table , 0 ,- 1 ); if ( this -> getLeftJoin()) { if ( ! this -> BuildLeftJoins()){ this -> dbgFailed( funct ); return ;} this -> Result .= " " . this -> ResultLeftJoin; } if ( this -> getConditions()) { if ( ! this -> BuildCondition()){ this -> dbgFailed( funct ); return ;} this -> Result .= " WHERE ( " . this -> Condition . " ) " ; } if ( this -> getSearch()) { if ( ! this -> BuildSearch()){ this -> dbgFailed( funct ); return ;} if ( this -> ResultSearch) { if ( eregi ( " WHERE " , this -> Result)){ this -> Result .= " AND " . this -> ResultSearch;} else { this -> Result .= " WHERE " . this -> ResultSearch;} } } if ( this -> getOrder()) { if ( ! this -> BuildOrder()){ this -> dbgFailed( funct ); return ;} this -> Result .= " " . this -> ResultOrder; } if ( this -> getSort()) { if (@ this -> ResultOrder) { this -> Result .= " " . this -> getSort(); } } return true ; } function getCondition(){ return @ this -> Condition;} function getConditions(){ if ( count (@ this -> Conditions) && is_array (@ this -> Conditions)){ return @ this -> Conditions;}} function getFields(){ if ( count (@ this -> Fields) && is_array (@ this -> Fields)){ return @ this -> Fields;}} function getLeftJoin(){ if ( count (@ this -> LeftJoin) && is_array (@ this -> LeftJoin)){ return @ this -> LeftJoin;}} function getOrder(){ return @ this -> Order;} function getSearch(){ return @ this -> Search;} function getSort(){ return @ this -> Sort ;} function getTables(){ if ( count (@ this -> Tables) && is_array (@ this -> Tables)){ return @ this -> Tables;}} function getValues(){ if ( count (@ this -> Values) && is_array (@ this -> Values)){ return @ this -> Values;}} function setCondition( input ){ this -> Condition = input ;} function setConditions( input ) { if ( is_array ( input )){ this -> Conditions = input ;} else { this -> Error = get_class ( this ) . " ::setConditions \nParameter input not array " ; return ;} } function setFields( input ) { if ( is_array ( input )){ this -> Fields = input ;} else { this -> Error = get_class ( this ) . " ::setFields \nParameter input not array " ; return ;} } function setLeftJoin( input ) { if ( is_array ( input )){ this -> LeftJoin = input ;} else { this -> Error = get_class ( this ) . " ::setFields \nParameter input not array " ; return ;} } function setOrder( input ){ this -> Order = input ;} function setSearch( input ){ this -> Search = input ;} function setSort( input ){ this -> Sort = input ;} function setTables( input ) { if ( is_array ( input )){ this -> Tables = input ;} else { this -> Error = get_class ( this ) . " ::setTables \nParameter input not array " ; return ;} } function setValues( input ) { if ( is_array ( input )){ this -> Values = input ;} else { this -> Error = get_class ( this ) . " ::setValues \nParameter input not array " ; return ;} } } ?>
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