UNIT V ESTABLISHING A DATABASE CONNECTION AND WORKING WITH DATABASE

Transcription

1 UNIT V 1 ESTABLISHING A DATABASE CONNECTION AND WORKING WITH DATABASE

2 SYLLABUS 5.1 Overview of Database 5.2 Introduction to MYSQL 5.3 Creating Database using phpmyadmin & Console(using query, using Wamp server) 5.4 Connecting with PHP/ Database Connection, creating and executing queries using mysql_query() 5.5 Creating tables, inserting data in to table, inserting data through HTML Forms 2

3 5.6 Retrieving data from Table, using mysql_numrows(), Printing the output using PHP and HTML 5.7 Searching a record, displaying record fields in HTML form controls, Updating and deleting records 5.8 Hosting Website (Using C panel, Using Filezilla Software) 5.9 Working on mini PHP Project: Developing a sample web based application and hosting it 3

4 5.1 OVERVIEW OF DATABASE Database: A database is simply an organized collection of related data, typically stored on disk, and accessible by possibly many concurrent users. Databases are generally separated into application areas. For example, one database may contain Human Resource (employee and payroll) data; another may contain sales data; another may contain accounting data; and so on. Databases are managed by a DBMS. DBMS A Database Management System (DBMS) is a set of programs that manages any number of databases. 4

5 5.2 INTRODUCTION TO MYSQL MySQL is a database system used on the web MySQL is a database system that runs on a server MySQL is ideal for both small and large applications MySQL is very fast, reliable, and easy to use MySQL uses standard SQL MySQL compiles on a number of platforms MySQL is free to download and use MySQL is developed, distributed, and supported by Oracle Corporation 5

6 MYSQL STRUCTURE AND SYNTAX : My SQL is a relational database management system. In Relation Database Management system every database consists of one of more tables inside it/ Thus you can say that a Database is a collection of one or more then one tables which are related with each other in one or another way. A table in the Database is used to store records. The records in the table are organized in the form of rows. Each row in the table represents particular record. A record that is contained in the table is a collection of one or more columns. Each column in the record represents field of specific type in the database table. Each field in the record contains values for the different records. 6

7 Thus you can say that a Database is a collection of tables. Tables is a collection of records and record is a collection of fields as shown below : Database : College Information System Table 1 : Department_Master Field 1 Field 2 DepartmentCode DepartmentName 1 Computer 2 Mechanical 3 Electrical Record 1 Record 2 7 Record 3

8 Table 2 : Faculty_Master Field 1 Field 2 Field 3 FacultyCode DepartmentCode FacultyName 1 1 Patel Chandresh 2 2 Purani Mukesh 3 3 Shah Ghanshyam Record 1 Record 2 Record 3 In the above figure Database College Information system consist of two tables named Department_Master and Faculty_Master. Both tables having one common field DepartmentCode inside it which means both tables are related with each other. 8

9 Data Type of MySQL :MySQL Data Types are divided into three main categories as given below : (1) Numeric DataType (2) String or Text DataType (3) Date Time Data Type Numeric DataType : Sr.No Data Type Size 1 TINYINT 1 It is used to store integer values. 2 SMALLINT 2 It is used to store integer values. 3 MEDIUMINT 3 It is used to store integer values. 4 INT 4 It is used to store integer values. 5 BIGINT 8 It is used to store integer values. 6 FLOAT 4 It is used to store single precision floating point value. 7 DOUBLE 8 It is used to store double precision floating point value. 8 DECIMAL It is used to store integer values. 9

10 String or Text Data Type : Sr.No Data Type SIZE 1 CHAR 255 It is used to store fixed length string. 2 VARCHAR 255 It is used to store variable length string. 3 TINYBLOB 255 It is used to store short binary data. 4 TINYTEXT 255 It is used to store short text string. 5 BLOB It is used to store large binary data. 6 TEXT It is used to store large text string. 7 MEDIUMBLOB It is used to store medium binary data. 8 MEDIUMTEXT It is used to store medium text string. 9 LONGBLOB It is used to store extremely large binary data. 10 LONGTEXT It is used to store extremely large text string. 10

11 Data Time Data Type : Sr. No Data Type SIZE 1 DATE 3 It is used to store date values in the YYYY MM DD Format. 2 TIME 3 It is used to store time values or time duration in the HH : MM : SS format. 3 YEAR 1 It is used to year values in the YYYY format. 4 DATETIME 8 It is used to store Date and Time value in the YYYY MM DD HH : MM : SS format. 5 TIMESTAMP 9 It is used to store combined date and time value in the YYYYMMDDHHMMSS format. 11

12 FIELD MODIFIER IN MYSQL : (1) NULL or NOT NULL : It allows you to specify weather the field can accept null value or you must have to enter value for that field. You can specify this modifier at the end field definition. By default all the filed of the table having this modifier set to NULL 12

13 Example : CREATE TABLE Subject ( SubjectCode varchar (5) NOT NULL, SubjectName varchar (10) NOT NULL, SubDesc varchar (20) NULL ) (2) DEFAULT : Default modifier allows you to specify default value for the field so if you don t enter any value for that field then default value is used. 13

14 Example : CREATE TABLE Subject ( SubjectCode varchar (5) NOT NULL, SubjectName varchar (10) NOT NULL, SubDesc varchar (20) DEFAULT Computer ) 14

15 (3) AUTO_INCREMENT : This modifier automatically increments the value of field by one. There is no need to insert explicit value for this field. It is widely used in primary key field where unique id is generated automatically by MySQL each time by incrementing previous by 1. However you can specify AUTO_INCREMENT modifier for only INT data type. Example : CREATE TABLE Subject ( SubjectCode INT(5) AUTO_INCREMENT, SubjectName varchar (10) NOT NULL, SubDesc varchar (20) NULL, 15 )

16 PHP OPERATORS Operators are used to perform operations on variables and values. PHP divides the operators in the following groups: Arithmetic operators Bitwise operators Comparison operators Logical operators 16

17 ARITHMETIC OPERATORS 17

18 COMPARISON OPERATORS 18

19 LOGICAL OPERATOR 19

20 BITWISE OPERATORS 20

21 Types of MySQL tables and storages engines : When you create table using Create Table statement it is also possible to specify type of the table using TYPE attribute as shown below : CREATE TABLE TableName ( ColumnName DataType, ColumnName DataType ) TYPE = TableType Following are the various Types of MySQL tables that you can specify at the time of creating new Database Table. 1. MyISAM 2. ISAM 3. HEAP InnoDB 5. BDB

22 LETS UNDERSTAND ALL THE TABLE TYPES IN DETAIL : 1. MyISAM : White creating Table if you don t specify the type of the Database Table then by default its type is set to MYISAM This table is portable. Portable means the table created using this type in one OS can also be used in other OS. It supports large table file more then 4GB. It is well suited for faster access then speed. It allows you to reduce the space using compression. It allows you to specify index on BLOB as well as TEXT type. 22

23 2. ISAM : This Table Type is similar to the MyISAM table type in the way it also supports fixed size as well as dynamic size table. But it is different from MYISAM table type in following way : It can support table files up to 4GB but not grater then 4GB. It is not portable. Means table created using this type in one OS can not use in other OS. It does not allow faster accessing and compression. Since maximum key length in this table type is 256 it does not allows you to specify index on BLOB and TEXT type. 23

24 3. HEAP : This table type is widely used for temporary tables because it supports incredible speed. It is in-memory table which uses hashed indices. It does not allow BLOB and TEXT type as MYISAM and ISAM type. 4. BDB : BDB is also known as Berkeley DB. This table type is transaction safe and widely used for transaction. It supports very large applications with more then one users trying to insert and update the same data at the same time. It allows you the facility of transaction using commit and rollback statement. 24

25 One important facility provided by this table type is that allows you the facility of recover data from crashes. It is not portable because the path of the table is hardwired into the table file while creating the table. 5. InnoDB : This table type is also transaction safe. It supports very large applications with more then one users trying to insert and update the same data at the same with locking mechanism. Locking mechanism prevents users from modifying records while another user is modifying the same record at the same time. It also allows you the facility of recovering data from crashes. 25 This table type is portable.

26 6. MERGE : This table type is useful for virtual table. This table type can be created by joining more then one MyISAM table types into single table. However you can join more then one MyISAM table if and only if all the table having same structure. MySQL Commands : MySQL Commands are divided into three different categories as per their functionality. 1. Database Definition Language (DDL): DDL contains commands that are used to define database or tables, define or alter structure or table, define relationship among various tables in the database, 26 drop database or tables.

27 DDL commands : Sr. No Command Purpose 1 CREATE DATABASE This command allows you to create new database. 2 USE This command allows you to create select database. 3 DROP DATABASE This command allows you to create delete database. 4 CREATE TABLE This command allows you to create new table in the selected Database. 5 ALTER TABLE This command allows you to modify the structure of the table. 6 DROP TABLE This command allows you to delete table from the database. 7 SHOW DATABASES This command allows you to display list of databases available in the server. 8 SHOW TABLES This command allows you to display list of tables available in the selected Database. 27

28 2.Database Manipulation Language (DML) : DML contains commands that are used to retrieve records from the table, insert new record into table, update records into table, and delete record from the table. DML commands : Sr. No Command Purpose 1 SELECT This command allows you to retrieve record from the table. You can specify various conditions with this command to retrieve specific records. 2 INSERT This command allows you to insert new record into table. 3 UPDATE This command allows you to update existing record. You can also specify condition with this command. 4 DELETE This command allows you to delete records from the table. You can also specify condition with this command. 28

29 3.Database Control Language (DCL): DCL contains commands that are used to define the various types of privileges on Database or tables. DCL commands : Sr. No Command Purpose 1 GRANT This command allows you to set or reset access privileges o the user for specific operations. 2 REVOKE Integration of PHP with MySQL: It is possible to execute various commands of MySQL from PHP application. PHP provides various built in functions that allow you to use MySQL commands from PHP page. Thus you can integrate PHP with 29 MySQL.

30 Sr. No Function Name Purpose 1 mysql_connect Using this function you an establish connection with MySQL. Server and connect with MySQL Server. 2 mysql_selectdb Using this function you can select the database from the MySQL Server on which you want to perform various operation. 3 mysql_query Using this function you can specify the command to be excecuted. 4 mysql_fetch_row Using this function you can retrieve single row from the result set. 5 mysql_fetch_array Using this function you can retrieve one or more rows from the result set. 6 mysql_num_rows Using this function you can display error message that is returned from MySQL. Server while executing the command. 7 mysql_rows Using this function you can retrieve number of records returned by executing the command. 8 mysql_close Using this function you can close the connection that 30 is established using mysql_connect function.

31 PHP built in functions 1. mysql_connect ( ) : This function allows you to establish connection of PHP application with MySQL server. Syntax : $VariableName = mysql_connect (servername, UserName, Password) ServerName : Indicates the name of the MySQL server with which you want to establish connection. UserName : Indicates name of the user using which you can logs on to MySQL server. Password : Indicates password of the user using 31 which you can logs on to MySQL Server.

32 This Function returns a Boolean value TRUE or FALSE. If connection establish successfully with MySQL Server then this function returns true value otherwise it returns false. Example : <?php $con = mysql_connect ( localhost, root ) ; if ($con) { econ Connected with MySQL ; } else { echo Can not connect with MySQL ; }?> 32

33 2. mysql_select_db ( ) : This function allows you to select database from the list of MySQL server database for performing various operations. Syntax : mysql_selectdb( DatabaseName, connectionname) ; DatabaseName : Indicates the name of the database that you want to select. ConnectionName : Indicates the name of the variable that is used at the time of established connection with MySQL server using mysql_connect ( ) function. This function returs a Boolean value TRUE or FALSE. If Function successfully executed then it returns TRUE otherwise it return false. 33

34 Example : <?php $con = mysql_connect ( localhost,root ) ; $db = mysql_selectdb ( MyDatabase ) ; if ($db) { echo Database Selected Successfully ; } else { echo Error while selecting the Database ; }?> 34

35 3. mysql_query ( ) : This function allows you to specify and execute the MySQL command on MySQL Server. Syntax : Mysql_query ( Query, COnnectionName) ; Here, Query : Indicates the MySQL command to be executed. ConnectionName : Indicates the name of the variable that is used at the time of establish connection with MySQL server using mysql_connect ( ) function. 35

36 Example : <?php $con = mysql_connect ( localhost, root ) ; $db = mysql_selectdb ( MyDatabase ) ; $cmd = mysql_query ( create table Test (ID integer, Name varchar (20)) ) ; if ($cmd) { echo Table created Successfully ; } else { echo Error while Executing query ; 36 }?>

37 4. mysql_fetch_row ( ) : This function allows you to retrieve a record from the record set that is returned from executing the MySQL query. The record that is returned by this function is in the form of numeric array. Numeric array contains idex and value associated with that index. If there is no record in the record set then it returns false value. Syntax : mysql_fetch_row ($VariableName) ; Here, Variable Name : Indicates the record set that is returned from executing the MySQL command using mysql_query ( ) function. 37

38 Example : <?php $con = mysql_connect ( localhost, root ) ; mysql_select_db ( Mydatabase, $con) ; $sql = select * from Package_Master ; $result = mysql_query ($sql, $con) ; $Ans = mysql_fetch_row ($result) ; print_r ($Ans) ; mysql_close ($con) ;?> 38

39 5. mysql_fetch_array ( ) : This function allows you to retrieve a record from the record set that is returned from executing the MySQL query. The record that is returned by this function is in the form of numeric array, associative array or both. If there is no record in the record set then it returns false value. Syntax : mysql_fetch_array ($VariableName, ArrayType) ; 39

40 Here, Variable Name : Indicates the record set that is returned from executing the MySQL command using mysql_query ( ) function. Array Type indicates the type of the array to be returned. It can have one of the following value : (1) MYSQL_ASSOC : This type of array contains name of the field and the value associated with that field for current record. (2) MYSQL_NUM : This type array contains index of the field and the value associated with that index for current record. (3) MYSQL_BOTH : It is combination of both Associative array and Numeric array. It is the default type to be returned by this function. 40

41 Example : <?php $con = mysql_connect ( localhost, root ) ; mysql_select_db ( mydatabase, $con) ; $sql = select * from Package_Master ; $result = mysql_query ($sql, $con) $Ans = mysql_query_fetch_array($result, MYSQL_ASSOC) ; print_r ($Ans) ; mysql_close ($con)?> 41

42 6. mysql_num_row ( ) : This function allows you to retrieve number of record available in the record set. Syntax : $Number = mysql_num_rows ($QueryResult) ; Here, QueryResult is the variable that holds the result returned by mysql_query ( ) function. It returns numeric value which contains number of records available in the record set. 42

43 Example : <?php $con = mysql_connect ( localhost, root ) ; mysql_select_db ( mydatabase, $con) ; $sql = select * from Package_Master ; $result = mysql_query ($sql, $con) $record = mysql_num_rows ($result) ; echo $ records, Records ; mysql_close ($con) ;?> 43

44 7. mysql_error ( ) : This function allows you to retrieve the description of error that is encountered while executing the script. If the script contains more then one errors then it will returns error description of the last statement in which error is encountered. If no error encountered while executing the script then it will returns blank string. Syntax : mysql_error ( ) ; 44

45 8. mysql_close ( ) : This function allows you to close the connection that is established using mysql_connect ( ) function. Syntax : mysql_close (ConnectionName) Here, ConnectionName : Indicates the name of the variable that is used at the time of establish connection with MySQL server using mysql_connect ( ) function. It returns a Boolean value TRUE or FALSE. If connection closed successfully then it returns TRUE 45 otherwise it returns FALSE.

46 5.3 CREATING DATABASE USING PHPMYADMIN & CONSOLE( USING QUERY, USING WAMP SERVER) We can work with mysql in any of the following three ways: 1. Using phpmyadmin We can perform database operations using phpmyadmin as follows: Click on phpmyadmin from wampserver icon in the taskbar You will be displayed with phpmyadmin window 2. Using PHP script With PHP scripts we can work with MySQL [ not in 46 syllabus]

47 3. Using MySQL console To use MySQL with wampserver we need to connect it as follows: Click on wampserver then click on MySQL option Click on MySQL console Press Enter key because the default password is blank You will be now displayed with mysql prompt 47

48 1. Using phpmyadmin Launch phpmyadmin Enter name of new database 48

49 Click on create button It will create new database and display statement 49

50 2. Using PHP script Example : <?php $con = mysql_connect ( localhost,root ) ; $db = mysql_selectdb ( MyDatabase ) ; if ($db) { echo Database Selected Successfully ; } else { echo Error while selecting the Database ; }?> 50

51 Launch MS-DOS Change current working directory to C:\wamp\bin\mysql\mysql5.5.8\bin> Type mysql u root, press enter Now you will get the prompt mysql> to type any SQL query from terminal(console) Type command: create database DWPD; It will create database named DWPD in Mysql 51

52 5.4 CONNECTING WITH PHP/ DATABASE CONNECTION, CREATING AND EXECUTING QUERIES USING MYSQL_QUERY() Connecting with PHP/ Database Connection PHP allows you to connect with MySQL server using mysql_connect built-in fuction. Syntax: $ VariableName = mysql_connect (servername, UserName, Password) 52

53 ServerName : Indicates the name of the MySQL server with which you want to establish connection. UserName : Indicates name of the user using which you can logs on to MySQL server. Password : Indicates password of the user using which you can logs on to MySQL Server. This Function returns a Boolean value TRUE or FALSE. If connection establish successfully with MySQL Server then this function returns true value otherwise it returns false. 53

54 Creating and executing queries using mysql_query(): This function allows you to specify and execute the MySQL command on MySQL Server Syntax : Mysql_query ( Query, COnnectionName) ; Query : Indicates the MySQL command to be executed. ConnectionName : Indicates the name of the variable that is used at the time of establish connection with MySQL server using mysql_connect ( ) function. 54

55 Example : <?php $con = mysql_connect ( localhost, root ) ; $db = mysql_selectdb ( MyDatabase ) ; $cmd = mysql_query ( create table Test (ID integer, Name varchar (20)) ) ; if ($cmd) { echo Table created Successfully ; } else { echo Error while Executing query ; }?> 55

56 5.5 CREATING TABLES, INSERTING DATA IN TO TABLE, INSERTING DATA THROUGH HTML FORMS We can work with mysql in any of the following three ways: 1. Using phpmyadmin 2. Using PHP 3. Using MySQL console 56

57 USING PHPMYADMIN Launch phpmyadmin Select name of database Enter name of new table and specify how many fields you want to add in table. Click on GO button It will ask you to define fields for your table by specifying field name and datatype Click on save button it will create new table with specified field and display statement Now if you want to define primary key then select field name and click on primary key It will display confirmation message click on ok 57

58 USING PHP SCRIPT To create table using php script: <?php $con = mysql_connect ( localhost, root ) ; //Select database mysql_select_db( DBDEMO ); //Specify query to create table $sql = create table customer( cus_code number, cus_name varchar2(20), city varchar(20)) ; //Execute query mysql_query($sql); //Close the connection mysql_close($con); 58 echo Table created successfully ;?>

59 USING CONSOLE To create table using console: 1. Launch MS-DOS 2. Change current working directory to c:\wamp\bin\mysql\mysql5.5.8\bin> 3. Type mysql u root. As you press enter key command prompt will be changed to mysql> 4. Now you can run SQL query from terminal. 5. Type the commands use DWD to open database 6. Write query to create table 59

60 INSERTING DATA INTO TABLE Inserting records in the table using PHPMyAdmin in order to insert new records in table select name of the table from the database and then click on insert link. It will display following screen. enter value in the textbox and click on GO. As you click on GO button it will insert record in the table and display insert statement. 60

61 Inserting records in the table using PHP script <?php //Establish connection with mysql $con = mysql_connect ( localhost, root ) ; //Select database mysql_select_db( DBDEMO ); //Specify query to create table $sql = insert into customer(cus_code, cus_name, city) values (1, abc, abad ) ; //Execute query mysql_query($sql); //Close the connection mysql_close($con); echo Data inserted successfully ;?> 61

62 5.6 RETRIEVING DATA FROM TABLE, USING MYSQL_NUMROWS(), PRINTING THE OUTPUT USING PHP AND HTML Step 1 : Establish connection with my sql server. Step 2 : select database from the my sql server. Step 3 : Specify the select query to retrieve records from datable table and execute it. Step 4 : Loop through each records that is retrieved from the database table and display them in the HTML table. 62

63 Write the following script in the PHP to display data from the database table in HTML table : <html> <head><title> display information using table </title></head> <body> <table border= 1 ><tr> <th>package code</th> <th>packge name</th> <th> total days</th> <th>packge cost</th></tr> <?php $con=mysql_connect( localhost, root ); Mysql_select_db( my database,$con); $sql= select*from package_master ; $result=mysql_query($sql,$con); 63

64 While ($row=mysql_fetch_array($result)) { $code=$row[ packagecode ]; $name=$row [ packagename ]; $days=$row[ totaldays ]; $cost=$row[ packagecost ];?> <tr> <td><?php echo $code;?></td> <td><?php echo $name;?></td> <td><?php echo $days;?></td> <td><?php echo $cost;?></td></tr> <?php } $record=mysql_num_rows($result);?> <tr> <td><?php echo $record. record ;?> </td> <?php Mysql_close($con);?> </tr></table></body></html> 64

65 OUTPUT: 65

66 ADDING LINKS TO THE TABLE AND DISPLAYING THE DETAILS. In relational database managements system a database consist of more then one tables and these tables are related with each other in one or another way. In such situation it is required to provide hyperlink in the displayed table so when user click on the hyperlink of particular record it will display detail description of that record in another page. 66

67 Here. Package_Master table contains list of packages available and package_detaill table contains detailed information of package_master table. <html> <head><title> display information using table </title></head> <body> <table border= 1 ><tr> <th>package code</th> <th>packge name</th> <th> total days</th> <th>packge cost</th> <th>package detail </th></tr> 67

68 <?php $con=mysql_connect( localhost, root ) ; Mysql_select_db( my database,$con); $sql= select*from package_master ; $result=mysql_query($sql,$con); While ($row=mysql_fetch_array($result)) { $code=$row[ packagecode ]; $name=$row [ packagename ]; $days=$row[ totaldays ]; $cost=$row[ packagecost ];?> 68

69 <tr><td><?php echo $code;?></td> <td><?php echo $name;?></td> <td><?php echo $days;?></td> <td><?php echo $cost;?></td> <td><a href= packagedetail.php?packegecode=<?php echo code;?> >detail</a></td></tr> <?php } $record=mysql_num_rows($result);?> <tr> <td><?php echo $record. record ;?> </td> <?php Mysql_close($con);?></table></body></html> 69

70 In above script we add hyperlink field in the table and cinstrust query string that contains package code along with url. So when user click on hyperlink it will redirectd to package detailed to php file along with package code with query string. Now in order to display information of the package whose packagecode is passed in the query string write 70 following script in packagedetail.php file as shown below :

71 <html> <head><title> display information using table </title></head> <body> <table border= 1 ><tr> <th>day</th> <th>places to visit</th> </tr> <?php $con=mysql_connect( localhost, root ); Mysql_select_db( mydatabase,$con); $sql= select * from package_ detail where pa.$_get[ packagecode ]. ; $result= mysql_query($sql,$con); While($row = mysql_fetch_array(result)) { $day=$row[ dayname ]; $place=$row[ placestovisit ]; 71?>

72 <tr> <td><?php echo $day;?></td> <td><?php echo $places;?></td> </tr> <?php } Mysql_close($con);?></table></body></html> Above script retrieves packagecode from url using gate method and display detailed information of that package code as shown below : 72

73 5.7 Searching a record, displaying record fields in HTML form controls, Updating and deleting records Steps to delete record from table using phpmyadmin Select name of the table from database.browse link it will display all records from table. Select record from list and click delete button. As you click on button it will display confirmation message. Click on OK button to delete record. 73

74 Steps to update record from table using phpmyadmin Select name of the table from database. Browse link it will display all records from table. Select record from list and click update button. As you click on button it will display confirmation message. Click on OK button to delete record. 74

75 Searching a record using php script Search.php <htmll><body> <form action= result.php" name="frmsearch" method="post"> Enter customer code:<input type="text" name= txtcode"><br> <input type="submit" name="submit" value= submit"><br> </form> </body> </html> 75

76 Result.php <html><body> <?php $code = $_POST[ txtcode ]; $con = mysql_connect ( localhost,root ) ; $db = mysql_selectdb ( MyDatabase ) ; $sql= select * from customer where code=.$code. ; $result=mysql_query($sql); While($row = mysql_fetch_array($result)) { $code = $row[code]; $name = $row[name]; $city = $row[city]; }?> 76

77 <form method= post action= delete.php > <table border=1> <tr><td>customer code: </td> <td><input type= text name= code value= <?php echo $code;?> /></td></tr> <tr><td>customer name: </td> <td><input type= text name= code value= <?php echo $name;?> /></td></tr> <tr><td>customer city: </td> <td><input type= text name= code value= <?php echo $city;?> /></td></tr> <tr><td> </td> <td><input type= submit name= submit value= update /></td></tr> </table></form> <?php mysql_close();?> </body></html> 77

78 Delete.php <?php $code = $_POST[ code ]; $con = mysql_connect ( localhost,root ) ; $db = mysql_selectdb ( MyDatabase ) ; $sql = delete from customer where code=.$code. ; Mysql_query($sql); Mysql_clode(); Echo record deleted successfully ;?> 78

79 UPDATE RECORD <?php $con=mysqli_connect("localhost","root","root"); $db=mysqli_select_db($con,"student1"); if($db) { echo "database selected<br>"; } else { echo "Database not selected<br>"; } $name=$_post['txtuser']; $no=$_post['txteno']; 79

80 $sql= "update stu_info set sname='$name' where sno='$no'"; if(mysqli_query($con,$sql)) { echo "Record is Updated successfully"."<br>"; } else { echo "Record is not Updated"."<br>"; }?> 80

81 5.8 Hosting Website (Using C panel, Using Filezilla Software cpanel is a web based control panel tool which will help you manage your web hosting account through a web interface instead of a console. With cpanel you are able to accomplish your tasks faster and even non-professionals can easily set their websites via cpanel. Please check this link to use cpanel anager.htm 81

82 5.9 Working on mini PHP Project: Developing a sample web based application and hosting it Review the link for mini PHP Projects Review point 5.8 for hosting 82

83 THANK YOU 83