ket noi php voi mysql

7/30/2019 ket noi php voi mysql

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i Hc S Phm Tp. H Ch Minhi Hc S Phm Tp. H Ch Minh

LP TRNH WEB PHPLP TRNH WEB PHP

Chng 04: Kt ni PHP vi MySQL


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Ni dung

1. Cc kiu d liu c bn trong MySQL

2. Cc lnh thng dng trong MySQL3. Kt ni MySQL t PHP

4. u trnh kt ni vo M S L

2

5. Cc bc truy cp CSDL MySQL


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11. Cc kiu d liu c bn trong. Cc kiu d liu c bn trong MySQLMySQL

KiuKiu M tM t

charchar(length)(length) ti a 255 k t, chiu di cnh =ti a 255 k t, chiu di cnh = lengthlength

varcharvarchar(length)(length) ti a 255 k t, chiu di ng


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KiuKiu M tM t

enumenum(option1,(option1,

option2,)option2,)tp hp tnh, ngha ti a 65.535 gi trtp hp tnh, ngha ti a 65.535 gi tr

-- --

1. Cc kiu d liu thng dng trong1. Cc kiu d liu thng dng trong

MySQLMySQL

4

timetime hh:mm:sshh:mm:ss

datetimedatetime yyyyyyyy--mmmm--dd hh:mm:ssdd hh:mm:ss


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KiuKiu M tM t

CREATECREATE to CSDL hoc bngto CSDL hoc bngALTERALTER thay i bng c snthay i bng c sn

SELECTSELECT chn d liu t bngchn d liu t bng

2. Cc lnh thng dng trong MySQL2. Cc lnh thng dng trong MySQL

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DELETEDELETE xa d liu khi bngxa d liu khi bngDESCRIBEDESCRIBE xem thng tin m t v cu trc bngxem thng tin m t v cu trc bng

INSERTINSERT INTOINTO ghi gi tr vo bngghi gi tr vo bng

UPDATEUPDATE cp nht d liu c trong bngcp nht d liu c trong bng

DROPDROP xa bng hay ton b CSDLxa bng hay ton b CSDL


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CREATE INDEXCREATE INDEX indexnameindexnameONON tablenametablename(column [ASC|DESC],(column [ASC|DESC],...);...);

CREATE PROCEDURECREATE PROCEDURE procedurenameprocedurename( [( [parametersparameters] ) BEGIN ...] ) BEGIN ...END;END;

CREATE TABLECREATE TABLE tablenametablename

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columncolumn datatype [NULL|NOT NULL]datatype [NULL|NOT NULL] [CONSTRAINTS],[CONSTRAINTS],

columncolumn datatype [NULL|NOT NULL]datatype [NULL|NOT NULL] [CONSTRAINTS],[CONSTRAINTS],

......

););

CREATE USERCREATE USER usernameusername[@[@hostnamehostname] [IDENTIFIED BY] [IDENTIFIED BY[PASSWORD] '[PASSWORD] 'passwordpassword'];'];

CREATE [OR REPLACE] VIEWCREATE [OR REPLACE] VIEW viewnameviewnameAS SELECT ...;AS SELECT ...;


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ALTERALTER TABLETABLE tablenametablename

((ADDADD column datatype [column datatype [NULL|NOTNULL|NOTNULLNULL] [] [CONSTRAINTSCONSTRAINTS],],

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CHANGECHANGE column columns datatype [column columns datatype [NULL|NOTNULL|NOTNULL] [NULL] [CONSTRAINTSCONSTRAINTS],],

DROPDROP column,column,

......););


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SELECTSELECT columnnamecolumnname, ..., ...

FROMFROM tablenametablename, ..., ...

[[WHEREWHERE ...]...]

[[UNIONUNION ...]...]

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[[GROUPGROUP BYBY ...]...]

[[HAVINGHAVING ...]...]

[[ORDERORDER BYBY ...];...];VD:VD: SELECTSELECT ** FROMFROM ketqua;ketqua;


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DELETE FROMDELETE FROM tablenametablename

[[WHEREWHERE ...];...];

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VD:VD:DELETE FROMDELETE FROM ketquaketqua WHEREWHERE

MaSV = K29.103.010MaSV = K29.103.010


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INSERT INTOINSERT INTO tablenametablename[(columns, ...)][(columns, ...)]

VALUESVALUES(values, ...);(values, ...);

INSERT INTOINSERT INTO tablenametablenameVALUESVALUES(value1,(value1,

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, ,, ,

VD:VD:

INSERT INTOINSERT INTOketqua (mamon, diem)ketqua (mamon, diem)VALUESVALUES(LTWEB, 10);(LTWEB, 10);

INSERT INTOINSERT INTOketquaketquaVALUESVALUES(, K29.103.010,(, K29.103.010,

LTWEB, 10);LTWEB, 10);


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UPDATEUPDATE tablenametablename

SETSET columnamecolumname= value, ...= value, ...[[WHEREWHERE ...];...];

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VD:VD:

UPDATEUPDATE ketquaketqua SETSET diem = 10diem = 10 WHEREWHERE MaSVMaSV

= K29.103.010= K29.103.010


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DROP DATABASEDROP DATABASE || INDEXINDEX || PROCEDUREPROCEDURE ||

TABLETABLE || TRIGGERTRIGGER || USERUSER || VIEWVIEW itemname;itemname;

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Xa bng SINHVIEN:Xa bng SINHVIEN: DROP TABLEDROP TABLE SinhVienSinhVien

Xa CSDL QLSV:Xa CSDL QLSV: DROP DATABASEDROP DATABASE QLSV;QLSV;


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Giao tip dng lnhGiao tip dng lnh

Kt ni mysql serverKt ni mysql server

mysql [mysql [--hh hostnamehostname] [] [--PP portnumberportnumber]] --uu usernameusername--pp

mysqlmysql [-h hostname] [-P portnumber] ----user=user=useruser----

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password=password=passpass

Nhp lnh sau du nhc lnhNhp lnh sau du nhc lnh mysqlmysql>>

Mi lnh SQL kt thc bng du ;Mi lnh SQL kt thc bng du ;


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Giao tip haGiao tip ha

Mt s cng c thng dngMt s cng c thng dng

SQLyog EnterpriseSQLyog EnterprisephpMyAdminphpMyAdmin

M SQL Quer BrowserM SQL Quer Browser

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MySQL MaestrosMySQL Maestros

NavicatNavicat

MySQL ManagerMySQL Manager


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3. Kt ni MySQL t PHP3. Kt ni MySQL t PHP

PHP scriptPHP script

Th vin chunTh vin chun

mysqlmysql

Th vin ci tinTh vin ci tin

mysqlimysqli

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S dng hmS dng hm

mysqlimysqli

S dng lpS dng lp

mysqlimysqli

mysqli_stmtmysqli_stmt mysqli_resultmysqli_result

S dng hmS dng hm

mysqlmysql


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Th vin mysql ci tin trong PHP5Th vin mysql ci tin trong PHP5

Thit lp trong php.iniThit lp trong php.ini

extension=php_mysqli.dllextension=php_mysqli.dll

u imu im

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H tr lp trnh hng i tngH tr lp trnh hng i tng H tr nhn bn v phn tn CSDLH tr nhn bn v phn tn CSDL Nn v m ha d liu trn kt niNn v m ha d liu trn kt ni Ti u hiu nng v mTi u hiu nng v m


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4. Quy trnh kt ni vo MySQL4. Quy trnh kt ni vo MySQL

1.1. M kt ni n CSDLM kt ni n CSDL

2.2. Chn CSDLChn CSDL3.3. Chn bng m (nu cn)Chn bng m (nu cn)

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..

5.5. Dn dpDn dp6.6. ng kt ning kt ni


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Bc 1: M kt ni n CSDLBc 1: M kt ni n CSDL

// OOP mysqli// OOP mysqli

$mysqli = new$mysqli = new mysqlimysqli('('hostnamehostname', '', 'usernameusername',',

''passwordpassword', '', 'dbnamedbname');');

// m s li// m s li

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$link =$link = mysqli_connectmysqli_connect('('hostnamehostname',',''usernameusername', '', 'passwordpassword', '', 'dbnamedbname');');


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Bc 2: Chn CSDLBc 2: Chn CSDL


$mysqli$mysqli-->select_db>select_db('dbname');('dbname');

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mysqli_select_dbmysqli_select_db($link, 'dbname');($link, 'dbname');


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BcBc 33: Chn bng m (nu cn): Chn bng m (nu cn)


mysqlimysqli-->query>query($link, "SET NAMES ($link, "SET NAMES character setcharacter set")")

// mysqli// mysqli

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mysqli_querymysqli_query($link, "SET NAMES ($link, "SET NAMES character setcharacter set")")

VD: SET NAMES UTF8VD: SET NAMES UTF8


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Bc 4: X l CSDLBc 4: X l CSDL

Truy vnTruy vn

// OOP mysqli// OOP mysqli$result =$result = mysqlimysqli-->query>query(query")(query")

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// mysq// mysq$result =$result = mysqli_querymysqli_query($link, query")($link, query")


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Bc 4: X l CSDL (tt)Bc 4: X l CSDL (tt)

Ly d liu t truy vnLy d liu t truy vn// OOP mysqli// OOP mysqli

$row =$row = $result$result-->fetch_row()>fetch_row()

$row =$row = $result$result-->fetch_assoc()>fetch_assoc()$row =$row = $result$result-->fetch_array(>fetch_array(result_typeresult_type))

// m s li// m s li

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$row =$row = mysqli_fetch_rowmysqli_fetch_row($result)($result)$row =$row = mysqli_fetch_assocmysqli_fetch_assoc($result)($result)$row =$row = mysqli_fetch_arraymysqli_fetch_array($result,($result, result_typeresult_type))


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Bc 5: Dn dpBc 5: Dn dp


$result$result-->close>close()()

// mysqli// mysqli

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_ __ _


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Bc 6: ng kt niBc 6: ng kt ni


$mysqli$mysqli-->close>close()()

// mysqli// mysqli

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mysqli_closemysqli_close($link)($link)


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5. Cc bc truy cp CSDL MySQL

1. To kt ni n database server

2. La chn CSDL

3. Xy dng truy vn v thc hin truy vn

4. X l kt u tr v

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5. ng kt ni n server


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Khai bo sdng CSDL MySQLKhai bo kt ni CSDL:


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Khai bo sdng CSDL MySQL (tt)

Truy vn d liu:$result =mysqli_query(cu_truy_vn);

Gii phng ti nguyn truy vnmysqli_free_result($result );

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:mysqli_fetch_array($result);mysqli_fetch_row($result);

mysqli_fetch_assoc($result);

S dng ting vit:mysqli_query(SET CHARACTER SET UTF8);

Haymysqli_query(SET NAMES UTF8);


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Lu

Hm die(Chui): a ra thng bo vkt thc.

Vi cch vit trn, die ch thc hin khilnh trc n khng thnh cng

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Cc hm cn thit: mysqli_affected_rows(): S bn ghi b tc ng

bi lnh mysqli_query lin trc.

mysqli_error(): Thng bo li (nu c) mysqli_errno(): M li


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Xem thm

Kt ni CSDL MySQL s dng PDO

PHP Data Objects

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Cu hnh sdng PDO

Need to enable PDO in your php.ini

MUST load PDO first

Unix:

extension=pdo.so

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extension=pdo_XXX.so

Windows

extension=php_pdo.dll

extension=php_pdo_XXX.dll


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Connecting via PDO

try {

$dbh = new PDO($dsn,

$user, $password, $options);

catch PDOExce tion e

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echo Failed to connect:

. $e->getMessage();

}


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DSN format in PDO

Driver:optional_driver_specific_stuff sqlite:/path/to/db/file

sqlite::memory: mysql:host=name;dbname=dbname

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_ _ _

oci:dbname=dbname;charset=charset

firebird:dbname=dbname;charset=charset;role=role

odbc:odbc_dsn


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Connection management

try {

$dbh = new PDO($dsn, $user, $pw);

} catch (PDOException $e) {

echo connect failed: . $e->getMessage();

}

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//

// done; release the connection

$dbh = null;


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Lets get data

$dbh = new PDO($dsn);

$stmt = $dbh->prepare(

SELECT * FROM FOO);

stmt->execute

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while ($row = $stmt->fetch()) {

print_r($row);

}


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Fetch types

$stmt->fetch(PDO_FETCH_BOTH) Array with numeric and string keys

default option

PDO_FETCH_NUM Array with numeric keys

PDO_FETCH_ASSOC

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Array with string keys

PDO_FETCH_OBJ $obj->name holds the name column from the row

PDO_FETCH_BOUND

Just returns true until there are no more rows


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Lets change data

$deleted = $dbh->query(

DELETE FROM FOO WHERE 1);

chan es = dbh-> uer

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UPDATE FOO SET active=1

. WHERE NAME LIKE %joe%);


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Smarter Queries

Quoting is annoying, but essential

PDO offers a better way

$stmt->prepare(INSERT INTO CREDITS(extension, name) VALUES (:extension,

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$stmt->execute(array(

:extension => xdebug,

:name => Derick Rethans));


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Binding for output

$stmt = $dbh->prepare(

"SELECT extension, name from CREDITS");

if ($stmt->execute()) {

$stmt->bindColumn(extension', $extension);

$stmt->bindColumn(name', $name);

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- _ _

echo Extension: $extension\n;echo Author: $name\n;

}

}


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Transactions

try {

$dbh->beginTransaction();

$dbh->query(UPDATE );$dbh->query(UPDATE );

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$dbh->commit();} catch (PDOException $e) {

$dbh->rollBack();

}


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Cu hi v tho lun

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ket noi php voi mysql

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