DAY 08 | PHP AND MYSQL | VI SEM | B.CA | FORM HANDLING | L2

Summary

This educational video script delves into the fundamentals of form handling in PHP, a server-side scripting language. It explains the role of HTML forms in collecting user inputs and the importance of form elements like text boxes, checkboxes, and submit buttons. The script covers the GET and POST methods for data submission, emphasizing form validation, sanitization, and storage. It also touches on object-oriented programming concepts like classes and inheritance, setting the stage for a deeper exploration of PHP's capabilities in database handling.

Takeaways

• 😀 Forms are essential in web development for collecting user input and allowing users to interact with websites.
• 🔒 PHP forms play a critical role in applications such as contact forms, registration forms, and login forms, especially when sensitive information is involved.
• 📝 HTTP stands for Hypertext Transfer Protocol, which is used for communication between the client and the server.
• 🔑 The GET method in forms is used to request data from a specific source, with the data being visible in the URL.
• 🔍 The POST method in forms is used to submit data to a specific source, keeping the data invisible to the user in the URL.
• 📥 PHP offers various functions and features for form processing, including form validation, sanitization, and data storage.
• 📝 HTML forms are used to send user information, and PHP can embed within HTML to collect this information.
• 🔄 Form controls like text boxes, text areas, dropdowns, radio buttons, checkboxes, and buttons are used to design interactive forms.
• 🔑 The 'action' attribute in a form tag specifies the URL to which the form data will be sent for processing.
• 🔄 The 'method' attribute in a form tag determines how the form data is sent, either using GET or POST.
• 🔒 Form validation is crucial for ensuring that the input meets certain criteria before being processed, like checking for uppercase, lowercase, digits, and special symbols in a password.

Q & A

What is the primary function of a form in web development?

The primary function of a form in web development is to collect user input and allow the user to submit the data to a server for processing.

What does HTTP stand for and what is its role in communication between a client and a server?

HTTP stands for Hypertext Transfer Protocol, and it is used to enable communication between a client and a server by acting as a request-response protocol.

What are the two methods available in HTML forms for sending data to a server?

The two methods available in HTML forms for sending data to a server are GET and POST.

What is the difference between using the GET method and the POST method in a form?

The GET method sends data in the URL string, making it visible to the user, while the POST method sends data invisibly to the user, not appearing in the URL.

What is the purpose of form validation in PHP?

Form validation in PHP is used to verify the correctness and security of the data submitted by the user, ensuring that it meets certain rules and standards before processing.

Can you explain the concept of inheritance in object-oriented programming as mentioned in the script?

Inheritance in object-oriented programming is a feature that allows the creation of a new class from an existing one, enabling code reuse and establishing a relationship between classes.

What is the role of the 'action' attribute in an HTML form tag?

The 'action' attribute in an HTML form tag specifies the URL of the web page that will process the form data upon submission.

What is a text box in a form used for?

A text box in a form is used to allow the user to provide a single line of input, such as entering a name or a search query.

What is the purpose of the 'required' attribute in an input field within a form?

The 'required' attribute in an input field within a form specifies that the field must be filled out before the form can be submitted, ensuring that necessary information is provided by the user.

What is the difference between a radio button and a checkbox in a form?

A radio button allows the user to select only one option from a group, while a checkbox allows the user to select multiple options from a group.

How does a submit button function in a form?

A submit button in a form triggers the submission of the form data to the server for processing when clicked by the user.

Outlines

00:00

📝 Introduction to Form Handling in PHP

The first paragraph introduces the concept of form handling in PHP, emphasizing the importance of forms in web development for collecting user input. It discusses the role of HTTP in client-server communication and HTML forms for sending user data. The instructor, M faculty, sets the stage for a session on form handling, recalling previous topics such as classes, objects, and inheritance in PHP. The paragraph also touches on the practical example of a result search form, illustrating how user input is submitted to the server for processing.

05:02

🔒 Form Validation, Sanitization, and Storage in PHP

This paragraph delves into the specifics of form processing in PHP, including validation, sanitization, and data storage. It explains form validation as the process of verifying user input against certain rules, using the example of a Google login form that requires a mix of uppercase, lowercase, digits, and special characters. The paragraph also highlights PHP's capabilities in creating dynamic and interactive web pages and the critical role forms play in applications like contact and registration forms, emphasizing the need for secure handling of sensitive information.

10:04

🌐 Understanding Form Elements and HTTP Methods

The third paragraph provides an in-depth look at the various form elements such as text boxes, text areas, dropdowns, radio buttons, checkboxes, and submit buttons, explaining their functions in a form. It also discusses the two primary HTTP methods used in forms: GET and POST. The GET method appends data to the URL, making it visible to the user, while the POST method sends data separately, keeping it hidden from the user. The paragraph further explains the importance of form attributes like 'action', 'method', and 'name' in defining how and where the form data is processed.

15:06

📝 Creating a Simple HTML Form with PHP

This paragraph outlines the process of creating a simple HTML form and embedding PHP within it. It describes the structure of an HTML form, including the opening and closing tags, and the use of attributes like 'action', 'method', and 'name'. The paragraph provides a step-by-step guide on adding form controls such as text boxes, text areas, email fields, password fields, and a submit button. It also explains the significance of the 'required' attribute in making certain fields mandatory for user input.

20:09

🔄 Exploring HTTP GET and POST Methods in Form Submission

The fifth paragraph focuses on the use of HTTP GET and POST methods in form submission. It explains how HTTP facilitates communication between the client and server as a request-response protocol. The paragraph provides examples of how to implement the GET method in an HTML form, detailing the process of requesting data from a specific source. It also contrasts the GET method with the POST method, which is used for submitting data to a specified source, with the key difference being the visibility of data in the URL.

25:11

📚 Conclusion and Preview of Upcoming PHP Sessions

The final paragraph concludes the session on form handling in PHP and provides a preview of the next topic: database handling using PHP with MySQL. It summarizes the key points discussed in the session, including the creation and processing of forms, the use of GET and POST methods, and the importance of form validation and security. The instructor thanks the students for their attention and expresses anticipation for the next session, which will cover database management in PHP.

Keywords

💡Form

A 'Form' in the context of this video is a graphical user interface used to collect user input in web development. It's a fundamental component that allows users to interact with a website by entering data, which is then submitted to a server for processing. In the script, forms are essential for tasks like searching for results, entering USN and date of birth, and are a key focus of the session on form handling.

💡HTTP

HTTP, or Hypertext Transfer Protocol, is the foundation of data communication on the web. It is a request-response protocol that enables interaction between clients (typically web browsers) and servers. In the video, HTTP is mentioned as the protocol used to send form data from the client to the server, with methods like GET and POST being discussed.

💡HTML Forms

HTML Forms are a set of elements used in web pages to collect user information. They are crucial for creating interactive webpages where users can input data. The script discusses HTML forms in the context of embedding PHP to create dynamic web applications that can handle user inputs like text boxes, submit buttons, and other form controls.

💡Form Handling

Form handling refers to the process of managing form data on the server side, which includes validating, sanitizing, and storing the data. The video's theme revolves around form handling in PHP, explaining how to create forms in HTML and process them with PHP to create interactive web applications.

💡PHP

PHP, or Hypertext Preprocessor, is a server-side scripting language used to create dynamic web pages. In the script, PHP is highlighted as the tool for processing form data, demonstrating how it can be embedded within HTML forms to collect and handle user inputs.

💡GET Method

The GET method is one of the two primary ways data is sent from a client to a server in an HTTP request. It appends data to the URL, making it visible and used for requesting data from a specific source. In the video, the GET method is contrasted with the POST method, showing how it can be used in forms to send data.

💡POST Method

The POST method is another way of sending data in an HTTP request, but unlike GET, it sends data in the body of the request, making it invisible to the user. It's used for submitting data to a server for processing, as discussed in the script when explaining form data submission.

💡Form Validation

Form validation is the process of verifying that the data entered into a form meets certain criteria before it is submitted. It's a critical part of form handling to ensure data integrity and security. The script mentions form validation as a PHP feature for processing form data.

💡Form Sanitization

Form sanitization involves cleaning the data entered into a form to prevent security vulnerabilities such as SQL injection. It's a part of the form handling process in PHP, as mentioned in the script, to ensure that the data is safe to use.

💡Inheritance

Inheritance is a concept from object-oriented programming that allows a new class to be created from an existing class, inheriting its properties and methods. In the script, inheritance is briefly mentioned as a concept discussed in a previous session, highlighting the relationship between classes in PHP.

💡Web Development

Web development is the process of creating and maintaining websites. It involves a range of skills, including HTML, CSS, and scripting languages like PHP. The script discusses web development in the context of form handling, emphasizing the importance of forms in creating interactive and dynamic web pages.

Highlights

Form is responsible for collecting user input in web development.

HTTP stands for Hypertext Transfer Protocol, which enables communication between client and server.

HTML forms are used to send user information using text boxes for single line input.

Forms play a fundamental role in server-side scripting with PHP.

PHP supports only single inheritance in object-oriented programming.

Form handling involves creating forms in PHP to collect and submit user data to the server.

Form processing in PHP includes form validation, sanitization, and data storage.

Validation ensures the correctness of user input, like rules for a password.

PHP forms enable the creation of dynamic and interactive web pages.

Forms are critical in applications like contact forms, registration forms, and login forms.

HTML forms use the 'form' tag with attributes like action, method, and name.

The 'get' method in forms appends data to the URL, while 'post' keeps data invisible to the user.

Form controls include text boxes, text areas, dropdowns, radio buttons, checkboxes, and submit buttons.

Creating a simple HTML form involves specifying the form elements and their attributes.

HTTP's 'get' and 'post' methods are used in forms for data retrieval and submission.

A web browser acts as a client submitting HTTP requests, while the server provides responses.

The session concludes with an introduction to database handling in PHP with MySQL in the next chapter.

Transcripts

what is form here form is responsible

for collecting the user input what do

HTTP stands for hypertext transfer

protocol used to enable communication

between client and server HTML forms are

used to send the user information text

box allows the user to provide the

single line

input

hello to all a warm welcome to my news

session on 4th unit that is nothing but

the form handling I'm your reati M

faculty from the Department of computer

science vidyashram first grade College

the Temple of excellence mauru in my

today's session I'm going to deal with

form handling before going to start my

today's session let me to recall the

topic what what I have discussed in my

last session in my last session I

started with class what is a class class

is nothing but a blueprint or template

along with that I have discussed how to

create a object object is nothing but

the instance of the Class by using

object I can able to access the

functionalities of the class so we can

able to create object using new keyword

or new operator along with that I have

discussed the concept called inheritance

so what is inheritance inheritance is

nothing but the feature of

objectoriented

programming we can able to create a new

class from the existing class that

concept is known as inheritance and PHP

supports only single inheritance these

are the con concept I have discussed in

my last session but in my today's

session I'm going to deal with form

handling in the sense how we can able to

create a form in PHP so dear student we

know that we are going to use PHP for

server side scripting and I'm going to

include or embed PHP with my

HTML and in HTML form as very important

concept why I use form in order to

collect the input from the client or

user now if I consider PHP okay

form plays very important role or it is

a fundamental component okay that allows

the user to accept the input in the

sense what it's mainly used to give the

or collect the input from the user so

PHP form is a fundamental component in

web development so if I consider web

development I have the concept called

form and forms are the way used to

collect the user input and it allows the

user to submit the data to a server okay

fine dear student you are familiar

with your result okay fine you are going

to get the information that okay result

is out now what you're going to do

you're going to search the result so

you're going to search the result okay

now you're going to get the form so here

you have the

usn okay fine at the same time you have

to give the input so you want to feed

the input so you want to enter the usn

at the same time you have the option

that is date of birth and you have to

fill the date of birth and you have the

button called submit you have the button

called

submit okay fine now where I'm going to

get this user interface in my client

system think that I'm the client okay in

my client system I'm going to get this

interface okay this is nothing but the

graphical user interface okay I'm going

to get this interface now what I will do

I'm going to enter the usn for example

say U1 2 3 4 and date of birth some date

of birth I'm going to enter okay when I

press submit what's going to happen this

data is submitted to the server okay

this data is submitted to the server the

job of the server is to process the data

okay what's my requirement here my usn

name and date of birth if my usn number

and date of birth informations are

present at the server okay now what the

server is going to do server is going to

process the data and it's going to send

the response back so what is form here

form is responsible for collecting the

US user input so it allows to enter the

data and it is responsible for

submission of the data to the server so

it provides an interface so it's a

interface for the user so that user can

able to enter the input in the sense

what user can able to interact with the

website PHP offers various functions and

features to handle the form processing

so the form processing may be form

validation so verify the form is known

as form validation data sanitization and

data storage okay so PHP form offers

what are the facility form validation

form sanitization and data storage so

what is validation validation is nothing

but the verification okay fine dear

student we are familiar with the Okay

Google login

right Google login so we have the US

usern

name okay and we have the

password so while entering password okay

I want to write the rule okay that's

nothing but the validation so what is is

the rule I want to

follow so see here I can have the

uppercase I can have the lower case

letters along with the digit and my

password must have any special symbols

okay I can have the uppercase lowercase

digit and special symbols that is

nothing but the validation okay now with

PHP form developers can able to create

Dynamic and interactive web page so that

user can able to enter their input and

they can able to perform the action okay

and they're going to get the output

based on the input so users are

responsible for entering the input okay

and servers are responsible for

processing the result and the processed

result is sent back to the client now if

I consider PHP form form plays very

critical role in

applications such as contact form in the

sense what when I want to collect

contact information okay registration

form we have online registration right

okay for that we can have the online

registration form we have the login

forms okay so when I collect the

sensitive information okay I want to

take care of the application okay

application is nothing but the forms so

HTML forms are used to send the user

information now in PHP okay to collect

the user information what I will do I'll

go with the HTML form now how I'm going

to create a form for that I'm going to

have have the tag called form in HTML I

have the tag called form okay and I can

have the form element and this form must

have the closing form tag now in PHP to

collect the user information I'm going

to use the forms okay so in PHP I can

able to embed PHP with the htmls for

that reason I'm going to use the HTML

forms now if I consider form I have the

attribute so how I'll write okay I have

the form tag okay and I can have the

attribute and if I consider the

attribute I have the action called URL

my action always

URL so I'm going to specify okay to

which web page I want to link l so I'll

write the complete URL so I'm going to

write the complete navigation to where

okay and how I'm going to collect all

the web page information I'm going to

write in my action so this attribute

usually has a link to web page that

contains code which process the form

okay so your action is nothing but the

URL next method if I consider form I I

can have two methods get method and post

method get in the sense what get the

data from the resource and post in the

sense what where I want to post the data

so here I can able to use two methods

one is get and another one is post so

this attribute specifies how the

information is sent get okay with a get

method so how I'm going to send the the

data for that I'm going to have the get

method all the information is sent in

your url string so what is URL Universal

resource locator and if I go with post

method all the information is sent but

invisible to the user so if I go with

the get method okay I can able to view

the information in my URL but if I go

with the post method I cannot able to

find any information in my URL so it is

invisible to the user and I have the

name okay suppose if I want to specify

the name of the name of the form then I

can able to specify when creating

complex form and using scripting you may

need to specify the name so specify the

name of the form form the name should be

unique so while specifying the name of

the form and if I have two two three

forms then I want to specify the unique

name for each form so that I can able to

identify the form

uniquely now okay what are the controls

I can have in my forms so think that

okay this is your

Google form so this is your Google form

okay fine now what I want to do I want

to get student information for that I'm

creating the Google form so what I will

do I'll write okay name so I'm going to

provide the box so that user can able to

input their name okay fine then I must

have the

gender okay then okay I'll provide okay

they have

to they have to select their combination

for example

BCA

BBA and

bcom okay at the same time they have to

submit the form so I'll give the button

called

submit so here text box labels okay okay

checkbox button these are the controls

okay these controls are used to design

the form now see here okay form

processing contains a set of controls

through that client can able to provide

the input now the most common form

control is text box text box in the

sense what user want to provide the

input so text box allows the user to

provide the single line input okay so by

using single line I can by using text

box I can able to access only single

line input then what about text area

when user want to provide multiple line

input then we will go with the text area

multiple line in the sense what more

than two lines then drop down drop down

or combo box allows the user to provide

select a value from a list of value so

see

here this is your drop down when I

select this one I want to get a long

list of information so that user can

able to select one information so that's

nothing but your drop down now if I

consider another okay control that is

nothing but the radio buttons so what is

radio buttons radio button allows the

user to select only one option so when I

can have the radio button for example if

I consider gender either I can have the

male or I can have the female so I want

to select one option at a time so I'll

go with the radio button there are

certain time I want to select multiple

option then I'll go with the checkbox so

checkbox allows the user to select

multiple option okay suppose if I want

to select

BCA Okay then if I want to select

BBA okay then what I will do I'll go

with the checkbox then what about submit

that is nothing but the button so

buttons are the clickable component so

when I press the button okay what's

going to happen the event is going to

trigger okay this button is going to

trigger

and okay this button is responsible for

okay submitting the form to the server

okay fine these are the some of the

controls okay fine now let's create a

simple HTML form we know that okay we

are going to embed

PHP in my HTML so I'll start with the

HTML and if I want to give the name to

the form okay so I'm going to give the

title that is simple form

processing and see here I'm creating the

form so I'll start with the form and I

want to specify the ID because in one

single HTML I can able to include

multiple forms okay for example I have

form one I have form two and I have form

three three forms so I want to to

identify these forms uniquely for that

I'm going to have the ID okay then I

want to write the method as it get or as

it post okay fine now see here first

okay I want to get the first

name first name okay in front of that

okay I want to read single line input

for that I'm going to have the okay I'm

going to have the text box so dear

student here input is nothing but the

tag where type is nothing but the

attribute used to specify the type okay

so here I'm using text box so it is

text in the sense okay what kind of

input I'm using for example if I'm using

text text box or text Area radio button

checkbox I want to specify that one what

kind kind of control I'm using then name

okay I want to give the name so I'll

write first name okay it is compulsory I

want to provide the input compulsory so

I'll write required then in the next

field okay next line what I want to get

I want to get the last name okay to

enter the last name once again I'm

considering the text box okay so what is

the name of the text box that nothing

but the last name

then okay I want to get the address

address so it is multi-line right so

input type text

area name what I'm going to give the

address okay fine then email

address so what kind of control I can

have the control is email see

here in my HTML 5 I can have the email

even I can have the controls like

password so what's my input type here

email okay so what is the name of the

control mail

address next what is my input type

password okay so what is the type of

input it is password what is the name of

the input it is password okay then I

want to have the button so it is nothing

but the type so what kind of input type

okay what kind of input here submit so

it is a button okay and what is the

value I must have on my button that's

nothing but the submit now what I'm

going to do here I'm going to close the

form now I'm going to close the body and

I'm going to close the HTML and if I see

the output how it's it's going to look

first name I'll write F

name colon okay you're going to get the

text box then L

Name colon text box after that

address okay once again text

box next

email uh address once again text box

then your

password once again text box and the

button it is submit okay this is the

expected output now see here I'm going

to use HTTP get and post method in my

form so what are the two methods I can

have in my form either get or post now

the hypertext transfer protocol what do

HTTP stands for hypertext transfer

protocol used to enable communication

between client and server

when I want to enable the connection

between client and server what I will do

I'll go with the

HTTP so that is nothing but the

hypertext transfer protocol now HTTP

works as a request response

protocol between client and server when

I use

HTTP okay it act as a

request and response so request in the

sense what client is going to do the

request okay who is going to provide the

response that is none other than server

for that reason HTTP work as a request

response protocol between client and

server so a web page that is a web

browser what is web browser it's a

application s software where we get our

output on the browser and example for

browser Mozilla Opera Chrome okay these

are the example for the browser okay a

web browser may be the

client and an application on a computer

that host a website maybe a server my

browser is nothing but the client okay

application is nothing but the server so

a client that is none other than browser

okay submits and

HTTP request who is going to submit

client is going to submit the request

and who is going to provide the response

that none other than the server okay

fine the response contain status

information about the request okay and

may also contain in the requested

content in the sense what client is

responsible for requesting the resource

and who is going to responsible for

providing the response that is none

other than server so client sends the

request now the server is responsible

for accepting the request process the

request and send the response back to

the client okay and if I consider HTT p

p what are the two commonly used methods

that is get method and post method if I

use get method okay what is the job of

the get method request data from a

specific source so I'm going to request

the data from this specific Source in

the sense what from where I want to get

the data okay I'm going to request by

using get and what about

post I'm going to submit the data data

okay submit the data to the processed to

a specified Source in the sense what to

whom I want to submit okay that is done

by using post okay fine let me to

consider the simple example here okay

how we can able to use the get method so

it is my HTML code what is the title of

the form get form okay now I have the

body so I'm getting the mage say get

form and I have the form in my form I'm

using the method called get and I'm

going to specify the action from where I

want to get the data or form so that's

nothing but the process

form.php

now okay I'm going to have the label

okay what I'm going to give name I want

to have the name in my label okay fine

then in front of of label what I must

have I must have the text box for that

I'm going to have the input type called

text okay and I I'm going to specify the

name of the text box at the same time

okay I'm going to provide the ID of the

text box okay now see here I I must have

the email so for that what I will do I'm

going to use the input type called email

if I want to have the message okay then

what I will do I'll take the text area

when I take text area when I want to

read multiple line input when I want to

have multiple line input then I'll go

with the text area okay fine then at the

end I must have the button okay for that

I'm going to consider the type button

button is nothing but the submit and

what is on my button I must have the

value or text on the button that is

nothing but the submit and I'm going to

close the form I'm going to close the

body I'm going to close the HTML this is

the way I can able to use get method in

my HTML okay in my PHP as well as in my

HTML anyway dear student in my today's

session I started with what is form

forms are nothing but the way used to

collect the input from the user okay so

how we are going to collect the input

from the user is nothing but the form

now okay along with that I have

discussed what is get method what is

post method how to use get method and

how to use post method anyway this is

all about how we can able to handle

forms in HTML anyway dear student let's

meet in the next chapter that is nothing

but the database handling using PHP with

my SQL anyway dear student let's meet in

the next session with the new chapter

that is nothing but how we can able to

handle database in PHP anyway dear

student thank you for watching my

session and let's meet in the next

session with more information about PHP

thank you