Chapter 09 php my sql

PHP MySQLPHP MySQL
Chapter 09
MOHAMAD RAHIMI MOHAMAD
ROSMAN

PHP MySQL IntroductionPHP MySQL Introduction
MySQL is the most popular open source
database server.
The free MySQL Database is very often
used with PHP.
Before you can access and work with data
in a database, you must create a
connection to the database.
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PHP MySQL IntroductionPHP MySQL Introduction
A database defines a structure for storing
information.
In a database, there are tables. Just like HTML
tables, database tables contain rows, columns,
and cells.
Databases are useful when storing information
categorically. A company may have a database
with the following tables: "Employees",
"Products", "Customers" and "Orders".
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PHP MySQL Connect to a DatabasePHP MySQL Connect to a Database
In PHP, this is done with the
mysql_connect() function.
Syntax
mysql_connect(servername,username,password)
;
mysql_connect($dbHost,$dbUser,$dbPass)or die(mysql_error());
mysql_select_db($dbName);
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Include databaseInclude database
To prevent
frequent
access to
database and
shorten the
code, we
should use
include()
within all the
files
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Closing a ConnectionClosing a Connection
The connection will be closed as soon as the
script ends. To close the connection before, use
the mysql_close() function.
<?php
$con = mysql_connect("localhost",“root",“is221");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_close($con);
?>
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QueriesQueries
A query is a question or a request.
With MySQL, we can query a database
for specific information and have a
recordset returned.
Look at the following query:
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Data TypesData Types
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Creating databaseCreating database
Open PHPMyAdmin
Create new database name “php”
Create new table name “user” (5 fields)
Insert following fields
◦ id (bigint, auto increment)
◦ Nama (text)
◦ Ic (text)
◦ Username (text)
◦ Password (text)
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Connecting to the databaseConnecting to the database
 Create a new text document, name it index.php
 Insert the following code
<html><body>
<?php
mysql_connect(“localhost”,”root”,””)or die(mysql_error());
mysql_select_db(“php”);
?>
</body></html>
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Insert Data From a Form Into a DatabaseInsert Data From a Form Into a Database
Now we will create an HTML form that can be
used to add new records to the "Person"
table.
Here is the HTML form:
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Step 1: Create HTML FormStep 1: Create HTML Form
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When a user clicks the submit button in the
HTML form in the example above, the form data
is sent to "insert.php".
The "insert.php" file connects to a database, and
retrieves the values from the form with the PHP
$_POST variables.
Then, the mysql_query() function executes the
INSERT INTO statement, and a new record will
be added to the database table.
Below is the code in the "insert.php" page:
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Insert.phpInsert.php
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Select Data From a Database TableSelect Data From a Database Table
The SELECT statement is used to select
data from a database.
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ExampleExample
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The WHERE clauseThe WHERE clause
To select only data that matches a specific
criteria, add a WHERE clause to the
SELECT statement.
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OperatorOperator
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The ORDER BY KeywordThe ORDER BY Keyword
The ORDER BY keyword is used to sort
the data in a recordset
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ExampleExample
$result = mysql_query("SELECT * FROM user ORDER BY
nama");
$result = mysql_query("SELECT * FROM user ORDER BY
username");
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Sort Ascending or DescendingSort Ascending or Descending
If you use the ORDER BY keyword, the
sort-order of the recordset is ascending by
default (1 before 9 and "a" before "p").
Use the DESC keyword to specify a
descending sort-order (9 before 1 and "p"
before "a"):
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Update Data In a DatabaseUpdate Data In a Database
The UPDATE statement is used to
modify data in a database table
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ExampleExample
mysql_query("UPDATE user SET username= ‘user‘ WHERE ic =
‘1'");
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Delete Data In a DatabaseDelete Data In a Database
The DELETE FROM statement is used to
delete records from a database table.
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ExampleExample
mysql_query("DELETE FROM user WHERE ic=‘1'");
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~…The end …~~…The end …~
Thank You Very Much!!
For further questions, comments & suggestion, contact me at:
MOHAMAD RAHIMI BIN MOHAMAD ROSMAN
09-976 2275 / 019-9891306
rahimi.rosman@yahoo.com
http://rahimi.official.ws
http://is110.official.ws
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