building web application using php & oracle - · pdf filebuilding web application using...

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Performance(Mar’12)

Building Web Application

Using PHP & Oracle

Balaranjith

Amit Surana

Date: November 8, 2013

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Topics

• Introduction about PhP

• Architecture of Oracle-PhP

• Using PhP along with Oracle Database

• Best practices (DRCP)

• Introduction to Frameworks

• Integration with Oracle EBS

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About PHP

•PHP is a server-side scripting language designed

for web development but also used as a general-

purpose programming language

•PHP is compatible with most of the databases

including Oracle.

•Any web based application can be easily

developed in PHP

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Why PHP

• PHP is freely accessible

• It's quick to develop in PHP

• Programmers of Java, PERL, BASIC, and

other popular languages can find many

parallels to ease transition to PHP

• It runs on disparate operating systems

• There are many support groups, forums, and

teams supporting PHP

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Architecture PHP & Oracle

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OCI8

• These functions allow you to access Oracle

Database 12c, 11g, 10g, 9i and 8i.

• They support SQL and PL/SQL statements.

• Basic features include transaction control,

binding of PHP variables to Oracle

placeholders, and support for large object

(LOB) types and collections.

• Oracle's scalability features such as Database

Resident Connection Pooling (DRCP) and

result caching are also supported.

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Connection with Oracle Database

• To enable the oracle database for PHP, after

installation of LAMP or WAMP one needs

to make some changes.

• Find the PHP configuration file php.ini and

locate the below line in the file and

uncomment it.

;extension=php_oci8.dll

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Connecting to Database

• To access the oracle database, first connect the

database. Database could reside on local or

remote server.

• Before starting the connection one would

require the username, password and tnsnames

for the database. Below is the code for how to

connect to Oracle database.

<?php

$c = oci_connect('un', 'pw', '//localhost/XE');

?>

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Retrieving and Modifying data in

Oracle using PHP

• SELECT

<?php

$s = oci_parse($conn, 'select * from employees');

oci_execute($s);

while ($row = oci_fetch_array($s))

foreach ($row as $item)

print $item;

?>

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Retrieving and Modifying data in

Oracle using PHP

• INSERT

• Below is example code for “INSERT” statement. We can also create dynamic insert query if values from the form are to be inserted.

• <?php

$s = oci_parse($conn, 'insert into employees(id,firstname,lastname,dob) values (1,‘Amit’, ‘Surana’, ’15-JUL-1990’)');

oci_execute($s);

?>

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Calling Oracle Stored Procedure

<?php

$s = oci_parse($conn, "begin

atulorc_tk_pkg.ATL_TK_GET_WEEKOFF(:bind0,

TO_DATE(:bind1,'DD-Mon-YYYY'),

TO_DATE(:bind2,'DD-Mon-YYYY'),

:bind3);

exception when others then

:bind4:=sqlerrm;

end;");

oci_bind_by_name($s, ":bind0", $_GET['emp_weekoff_chg'],32);

oci_bind_by_name($s, ":bind1", $_GET['weekoff_date'],32);

oci_bind_by_name($s, ":bind2", $_GET['new_date'],32);

oci_bind_by_name($s, ":bind3", $msg,1000); // 32 is the return length

oci_bind_by_name($s, ":bind4", $err,1000);

oci_execute($s, OCI_DEFAULT);

?>

OCI_BIND_BY_NAME() - Binds a PHP variable to an Oracle placeholder

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SQL Statement Execution

• Parse - oci_parse()

Prepares a statement for execution

• Bind - oci_bind_by_name()

Optionally binds variables in WHERE clause or

to PL/SQL arguments

• Execute - oci_execute()

The Database executes the statement and buffers

the results

• Fetch - oci_fetch_array()

Optionally retrieves results from the database

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Performance Improvement – DRCP

(Data Resident Connection Pooling)

• DRCP pools a set of dedicated database server processes (known as pooled servers), which can be shared across multiple applications running on the same or several hosts.

• A connection broker process manages the pooled servers at the database instance level.

• A connection broker accepts incoming connection requests from PHP processes (e.g. web server processes handling PHP requests) and assigns each a free server in the pool.

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DRCP Architecture

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DRCP Configuration

• The pool needs to be started before connection requests begin. The command below does this by bringing up the broker, which registers with the database listener:

– SQL> execute dbms_connection_pool.start_pool();

• Configuring PHP for DRCP

PHP must be built with the OCI8 1.3 or later extension. PHP 5.3 contains OCI8 1.4. For PHP 5.2 and older versions of PHP, download the latest release of OCI8 from PECL, extract it and use it to replace the existing ext/oci8 directory in PHP.

oci8.connection_class = MYPHPAPP

$c = oci_pconnect('myuser', 'mypassword', 'myhost/sales:POOLED');

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Introduction to Frameworks

• A framework provides the much sought after

robustness and strength to the website.

• It helps the developers to fast track the entire

development process and consequently they can

meet the high-end demands from the client side

easily.

• There are number of reasons for the need of

frameworks required for PHP.

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Advantages of Framework

• Code and File Organization

• Utilities and Libraries

• The MVC Pattern

• Security

• Less Code & Faster Development

• Performance Tools

• Suitable for Teamwork

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Framework Examples • Yii Framework

Yii is one of the most popular and top Framework amongst all

PHP Frameworks.

Yii has myriad of features such as MVC, DAO / Active

Record , I18N/L10N, caching, authentication and role-based

access control, scaffolding, testing, open source, high

performing, object oriented, database access object, easy form

validation, default support for web services and many more.

• CodeIgniter

Built for PHP coders who need a simple and elegant toolkit to

create full-featured web applications.

It is a framework requires nearly zero configurations.

It helps in eschewing complexity, and favoring simple

solution.

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Integrating with Oracle EBS

• Have you tried opening Oracle EBS from

disparate devices like mobile or tablet?

• Found difficulty??

• Is there any solution to this???

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Solution

• We can create our bespoke applications to

obtain the required data from the database and

display it in vanilla form or do the

manipulation and calculations and show it to

users.

• We can also create forms in PHP which are

easy to build, rich in user interface and easy to

deploy.

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Case

• Sales persons are always on the fly and getting the

access to Oracle EBS is not feasible.

• At such point of time integration of PHP and Oracle

database comes to rescue as we can create PHP forms

which can be accessed from varied devices or create

Android application which can easily talk with PHP

and Oracle database.

• Oracle EBS is already providing most of the API’s for

inserting and updating the record for most of the

functionality which can be easily used and can be

made accessible across disparate devices like smart

phones, tablets and PCs.

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Benefits & Challenges

• Benefits

Reduced load on Application Server

Rich user interfaces

Interactive websites

• Challenges

Security

Validation of data

Getting the stakeholders information

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Conclusion

• Though there are some challenges in

integrating such solution but with strong

and robust architecture and security design,

these solutions can help system to be

ubiquitous.

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